GOODMAN MBVC1200AA-1 Installation guide

Brand
GOODMAN
Model
MBVC1200AA-1
Category
Split-system air conditioners
Type
Installation guide

This manual is also suitable for

THIS PRODUCT CONTAINS ELECTRONIC COMPONENTS WHICH REQUIRE A DEFI-
NITE GROUND. PROVISIONS ARE MADE FOR CONNECTION OF THE GROUND. A
DEDICATED GROUND FROM THE MAIN POWER SUPPLY OR AN EARTH GROUND
MUST BE PROVIDED.
II
II
I
NTRNTR
NTRNTR
NTRODUCTIONODUCTION
ODUCTIONODUCTION
ODUCTION
This booklet contains the installation and operating instructions
for your modular blower cabinet. All warnings and precautions
within this booklet must be observed. Improper installation can
result in unsatisfactory operation or dangerous conditions and
void the warranty. Read this booklet and any instructions pack-
aged with accessories prior to installation. Give this booklet to
the user and explain its provisions. The user should retain this
booklet for future reference.
II
II
IMPORTANTMPORTANT
MPORTANTMPORTANT
MPORTANT N N
N N
NOTEOTE
OTEOTE
OTE TOTO
TOTO
TO THETHE
THETHE
THE O O
O O
OWNERWNER
WNERWNER
WNER REGARDINGREGARDING
REGARDINGREGARDING
REGARDING P P
P P
PRODUCTRODUCT
RODUCTRODUCT
RODUCT W W
W W
WARAR
ARAR
AR--
--
-
RANTYRANTY
RANTYRANTY
RANTY
Your warranty certificate is supplied as a separate document with
the unit installed by your contractor. Read the limited warranty
certificate carefully to determine what is and is not covered and
keep the warranty certificate in a safe place. If you are unable to
locate the warranty certificate please contact your installing con-
tractor or contact customer service (877-254-4729) to obtain a
copy.
IMPORIMPOR
IMPORIMPOR
IMPORTT
TT
TANTANT
ANTANT
ANT: :
: :
: To register your Goodman brand unit, go to
www.goodmanmfg.com. Click on the word “Warranty” located
on the left side of the home page. Next, click on the word “Prod-
uct Registration” located on the left side of the Warranty page
and complete the forms in the manner indicated on the Product
Registration page.
To register your Amana brand unit, go to www.amana-hac.com.
Click on the word “Warranty ” located on the top right of the home
page. Next, click on the word “Product Registration” located on
the left side of the Warranty page and complete the forms in the
manner indicated on the Product Registration page.
Product limited warranty certificates can be viewed at
www.goodmanmfg.com or www.amana-hac.com. Each product
overview page contains a Product Warranty link; by clicking on it
you will be able to view the limited warranty coverage for that
specific product. To view warranty registration information, click
on the Product Warranty text on the left navigation panel on the
home page of each website. The Online Product Registration
pages are located in this same section.
CC
CC
C
HECKINGHECKING
HECKINGHECKING
HECKING
P P
P P
P
RR
RR
RODUCTODUCT
ODUCTODUCT
ODUCT
R R
R R
R
ECEIVEDECEIVED
ECEIVEDECEIVED
ECEIVED
Upon receiving the unit, inspect it for damage from shipment.
Claims for damage, either shipping or concealed, should be filed
immediately with the shipping company. Check the unit model
number, specifications, electrical characteristics and accessories
MBVC
BLOWER CABINET
INSTALLATION INSTRUCTIONS
© 2009 G© 2009 G
© 2009 G© 2009 G
© 2009 Goodman Moodman M
oodman Moodman M
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to determine if they are correct. In the event an incorrect unit is
shipped, it must be returned to the supplier and must NOT be
installed. The manufacturer assumes no responsibility for instal-
lation of incorrectly shipped units.
RR
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EPLEPL
EPLEPL
EPLAA
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ACEMENTCEMENT
CEMENTCEMENT
CEMENT
P P
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ARAR
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ORDERINGRDERING
RDERINGRDERING
RDERING P P
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PARTSARTS
ARTSARTS
ARTS
When reporting shortages or damages, or ordering repair parts,
give the complete unit model and serial numbers as stamped on
the unit’s nameplate.
Replacement parts for this appliance are available through your
contractor or local distributor. For the location of your nearest
distributor, consult the white business pages, the yellow page
section of the local telephone book or contact:
SERVICE PARTS DEPARTMENT
GOODMAN MANUFACTURING COMPANY, L.P.
5151 SAN FELIPE, SUITE 500
HOUSTON, TEXAS 77056
(713) 861 – 2500
II
II
I
MPORMPOR
MPORMPOR
MPORTT
TT
TANTANT
ANTANT
ANT
S S
S S
S
AFETAFET
AFETAFET
AFETYY
YY
Y
I I
I I
I
NSTRNSTR
NSTRNSTR
NSTRUCTIONSUCTIONS
UCTIONSUCTIONS
UCTIONS
RR
RR
RECOGNIZEECOGNIZE
ECOGNIZEECOGNIZE
ECOGNIZE S S
S S
SAFETYAFETY
AFETYAFETY
AFETY S S
S S
SYMBOLSYMBOLS
YMBOLSYMBOLS
YMBOLS, W, W
, W, W
, WORDSORDS
ORDSORDS
ORDS, ,
, ,
, ANDAND
ANDAND
AND L L
L L
LABELSABELS
ABELSABELS
ABELS
The following symbols and labels are used throughout this
manual to indicate immediate or potential hazards. It is the
owner’s responsibility to read and comply with all safety infor-
mation and instructions accompanying these symbols. Failure
to heed safety information increases the risk of property dam-
age, product damage, personal injury or death.
HIGHVOLTAGE!
D
ISCONNECT
ALL
POWER
BEFORE
SERVICING
.
M
ULTIPLE
POWER
SOURCES
MAY
BE
PRESENT
.F
AILURE
TO
DO
SO
MAY
CAUSE
PROPERTY
DAMAGE
,
PERSONAL
INJURY
OR
DEATH
.
WARNING
ONLY
INDIVIDUALS
MEETING
THE
REQUIREMENTS
OF
AN
“E
NTRY
L
EVEL
T
ECHNICIAN
”
AS
SPECIFIED
BY
THE
A
IR
C
ONDITIONING
AND
R
EFRIGERATION
I
NSTITUTE
(ARI)
MAY
USE
THIS
INFORMATION
.
A
TTEMPTING
TO
INSTALL
OR
REPAIR
THIS
UNIT
WITHOUT
SUCH
BACKGROUND
MAY
RESULT
IN
PRODUCT
DAMAGE
,
PERSONAL
INJURY
,
OR
DEATH
.
WARNING
2
CARBON MONOXIDE POISONING HAZARD
-
Special Warning for Installation of Furnace or Air Handling Units in
Enclosed Areas such as Garages, Utility Rooms or Parking Areas
Carbon monoxide producing devices (such as an automobile, space
heater, gas water heater, etc.) should not be operated in enclosed areas
such as unventilated garages, utility rooms or parking areas because of
the danger of carbon monoxide (CO) poisoning resulting from the exhaust
emissions. If a furnace or air handler is installed in an enclosed area such
as a garage, utility room or parking area and a carbon monoxide producing
device is operated therein, there must be adequate, direct outside
ventilation.
This ventilation is necessary to avoid the danger of CO poisoning which
can occur if a carbon monoxide producing device continues to operate in
the enclosed area. Carbon monoxide emissions can be (re)circulated
throughout the structure if the furnace or air handler is operating in any
mode.
CO can cause serious illness including permanent brain damage or death.
B10259-216
GG
GG
G
ENERENER
ENERENER
ENERALAL
ALAL
AL
I I
I I
I
NFNF
NFNF
NFORMAORMA
ORMAORMA
ORMA
TIONTION
TIONTION
TION
The MBVC Blower Cabinets are used in combination with a cased
evaporator coil. This combination of blower and coil functions
as the indoor part of a split air-conditioning system, and may be
matched with a remote condensing or heat pump unit. The
blower cabinet can also function as an electric furnace when used
with an electric heater.
NONO
NONO
NOTE:TE:
TE:TE:
TE: The electric heating elements for electric furnace
installation are not shipped with the cabinet and are field-
installed.
Systems should be properly sized by heat gain and loss calcula-
tions made according to methods of the Air Conditioning Con-
tractors Association (ACCA) or equivalent. It is the contractor’s
responsibility to ensure the system has adequate capacity to heat
or cool the conditioned space.
FF
FF
FEATURESEATURES
EATURESEATURES
EATURES
This modular blower is a part of the ComfortNet™ family of prod-
ucts. It may be installed as part of a “legacy” system using a stan-
dard 24 VAC thermostat. However, with the CTK01AA
ComfortNet™ thermostat kit, this modular blower may be in-
stalled as part of a digitally communicating system. The
ComfortNet™ system provides automatic airflow configuration,
enhanced setup features, and enhanced diagnostics. It also re-
duces the number of thermostat wires to a maximum of four.
CC
CC
CLEARANCESLEARANCES
LEARANCESLEARANCES
LEARANCES A A
A A
ANDND
NDND
ND A A
A A
ACCESSIBILITYCCESSIBILITY
CCESSIBILITYCCESSIBILITY
CCESSIBILITY
The unit can be positioned for upflow, counterflow, horizontal
right or horizontal left operation. Zero clearance is allowed on
all sides for combustible materials. Thirty-six inches should be
allotted on the door side for maintenance and service.
To reduce risk of rusting, do not install the unit directly on the
ground or on a floor that is likely to be wet. In such environ-
ments, the unit must be elevated by use of a sturdy, nonporous
material.
II
II
INSULATIONNSULATION
NSULATIONNSULATION
NSULATION
To ensure efficient operation, review the following precautions.
• If the unit is located in an area with high ambient
temperature and/or high humidity, the air handler may
be subject to nuisance sweating of the casing. On these
installations, a wrap of 2” fiberglass insulation with a
vapor barrier is recommended.
• The factory recommends insulating the duct running
through any unconditioned spaces.
To reduce operating sound and vibration transmission use flex-
ible canvas duct connections at the cabinet.
II
II
I
NSTNST
NSTNST
NST
ALLALL
ALLALL
ALLAA
AA
ATIONTION
TIONTION
TION
I I
I I
I
NSTRNSTR
NSTRNSTR
NSTRUCTIONSUCTIONS
UCTIONSUCTIONS
UCTIONS
BB
BB
BLOWERLOWER
LOWERLOWER
LOWER WITHWITH
WITHWITH
WITH C C
C C
CASEDASED
ASEDASED
ASED E E
E E
EVAPORATORVAPORATOR
VAPORATORVAPORATOR
VAPORATOR C C
C C
COILOIL
OILOIL
OIL I I
I I
INSTALLATIONNSTALLATION
NSTALLATIONNSTALLATION
NSTALLATION
TOP CABINET
BOTTOM CABINET
Figure 1 - Coil and Blower Connection
Secure the coil and blower together with the two connector
plates and screws supplied in the blower bag assembly. Use one
connector plate and six screws on each side of the unit.
If accessory electric heat is to be added, install now per the in-
structions shipped with the heater kit.
UU
UU
UPFLOWPFLOW
PFLOWPFLOW
PFLOW I I
I I
INSTALLATIONNSTALLATION
NSTALLATIONNSTALLATION
NSTALLATION
For upflow installations, the blower cabinet must sit on top of
the coil cabinet (Figure 2). NONO
NONO
NOTE:TE:
TE:TE:
TE: All panels should be in place
before installing the cabinet.
1. Place the blower and coil cabinet assembly upright on the
return duct or duct opening. Ensure that there is ample
support for the cabinet assembly and all attached
ductwork.
2. Connect refrigerant and condensate drain connections
per the evaporator coil installation instructions. Ensure
refrigerant and drain lines do not interfere with service
access to the unit.
3. Attach supply ductwork. Seal connections between unit
and ductwork as required to reduce/eliminate air leakage.
4. Make electrical connections as specified in Electrical
Connections section of this manual.
3
Air Flow
Figure 2 - Upflow Application
CC
CC
COUNTERFLOWOUNTERFLOW
OUNTERFLOWOUNTERFLOW
OUNTERFLOW I I
I I
INSTALLATIONNSTALLATION
NSTALLATIONNSTALLATION
NSTALLATION
For counterflow installations, the evaporator coil cabinet must
sit on top of the blower cabinet (Figure 3). NONO
NONO
NOTE:TE:
TE:TE:
TE: All panels
should be in place when installing the unit.
Air Flow
Figure 3 - Counterflow Application
NONO
NONO
NOTE:TE:
TE:TE:
TE: Supply ductwork for counterflow applications, must be
Class I. However, if combustible ductwork is used, sheet metal
protection is required.
1. Place the blower and coil cabinet assembly supply outlet
on the supply duct or duct opening. Ensure there is ample
support for the unit and all attached ductwork.
2. Connect refrigerant and condensate drain connections
per the evaporator coil installation instructions. Ensure
refrigerant and drain lines do not interfere with service
access to the unit.
3. Attach return ductwork. Seal connections between unit
and ductwork as required to reduce/eliminate air leakage.
4. Make electrical connections as specified in Electrical
Connections section of this manual.
HH
HH
HORIZONTALORIZONTAL
ORIZONTALORIZONTAL
ORIZONTAL I I
I I
INSTALLATIONNSTALLATION
NSTALLATIONNSTALLATION
NSTALLATION
For horizontal installations, the coil cabinet must be upstream of
the blower cabinet (Figures 4 and 5). NONO
NONO
NOTE:TE:
TE:TE:
TE: All panels should be
in place when installing the unit.
1. Set the unit near its final installation place. The unit must be
supported along the entire length of the unit. Rubber isola-
tion pads may be used to reduce sound and vibration trans-
mission. Ensure there is ample support for the unit and all
attached ductwork.
Air Flow
Blower Cabinet
Support
Figure 4 - Attic Installation
Air Flow
Rods
Support
Figure 5 - Hanging Installation
2. If installed above a finished ceiling or living space, be sure
to put a secondary drain pan under the entire unit, and
pipe the drain separately from the main condensate drain.
3. Connect refrigerant and condensate drain connections
per the coil section installation instructions. Ensure
refrigerant and drain lines do not interfere with service
access to the unit.
4. Attach return and supply ductwork. Seal connections.
5. Make electrical connections as specified in Electrical
Connections section of this manual.
COUNTERFLOW AND HORIZONTAL APPLICATIONS
Loosen motor mount and rotate motor (See Figure 6). Be sure
motor is oriented with the female connections on the casing
pointing down. If the motor is not oriented with the connec-
tions pointing down, water will collect in the motor and cause
premature failure.
NONO
NONO
NOTE: TE:
TE: TE:
TE: After rotating motor, tighten motor mount to secure
motor. Be sure that the gap between the motor and the insulation
is the same as it was before loosening the motor mount. This will
ensure that the blower wheel is properly spaced inside the blower
housing.
FEMALE CONNECTIONS
SIDE VIEW
W
A
RNING
SOFTW
A
RE VER.
TOP
FRONT VIEW
Figure 6- MBVC Motor Orientation
4
EE
EE
E
LECTRICLECTRIC
LECTRICLECTRIC
LECTRICALAL
ALAL
AL
C C
C C
C
ONNECTIONSONNECTIONS
ONNECTIONSONNECTIONS
ONNECTIONS
Consult the local power company and local codes before install-
ing this unit. All wiring must be in accordance with the National
Electrical Code as well as all local codes. Knockouts have been
provided on side and top of the cabinet for the installation of the
electrical conduit. If the knockouts on the cabinet sides are used
for electrical conduit, an adapter ring must be used in order to
meet UL1995 safety requirements. Use Minimum Circuit Ampac-
ity and type of wire to determine proper wire size. The unit MUST
be properly grounded. A ground lug is provided in the unit.
Check all factory connections before connecting electrical power
to unit to ensure none were loosened or disconnected during
shipping and handling.
HIGHVOLTAGE!
T
O
PREVENT
PERSONAL
INJURY
OR
DEATH
DUE
TO
ELECTRICAL
SHOCK
,
DISCONNECT
THE
ELECTRICAL
POWER
BEFORE
ELECTRICALLY
CONNECTING
THE
UNIT
.
WARNING
T
O
AVOID
THE
RISK
OF
FIRE
OR
EQUIPMENT
DAMAGE
,
USE
COPPER
CONDUCTORS
.
WARNING
T
O
AVOID
THE
RISK
OF
PERSONAL
INJURY
,
WIRING
TO
THE
UNIT
MUST
BE
PROPERLY
POLARIZED
AND
GROUNDED
.
CAUTION
A
LL
WIRING
MUST
COMPLY
WITH
APPLICABLE
LOCAL
AND
NATIONAL
CODES
.T
YPE
AND
LOCATION
OF
FUSED
DISCONNECT
SWITCH
(
ES
)
MUST
COMPLY
WITH
ALL
APPLICABLE
CODES
AND
PROVIDE
OVERCURRENT
PROTECTION
AS
SHOWN
ON
THE
NAMEPLATE
.
WARNING
208/230 V208/230 V
208/230 V208/230 V
208/230 VOLTOLT
OLTOLT
OLT L L
L L
LINEINE
INEINE
INE C C
C C
CONNECTIONSONNECTIONS
ONNECTIONSONNECTIONS
ONNECTIONS
If heater kits will not be installed, remove the proper size knock-
out for the electrical conduit connection. Connect electrical con-
duit to the unit using two washers to make an approved connec-
tion.
The power supply wires must be connected to the red and black
power wiring. Two wire nuts are provided in the bag assembly
for this connection. Wrap the wire nuts with electrical tape. (In-
sulated crimp type connectors, field supplied, may be substituted
for the wire nuts and electrical tape provided proper size con-
nectors are used.) A ground wire MUST be connected to the
ground lug inside the unit.
LL
LL
LOWOW
OWOW
OW V V
V V
VOLTAGEOLTAGE
OLTAGEOLTAGE
OLTAGE W W
W W
WIRINGIRING
IRINGIRING
IRING
Low voltage wiring connections are made at the top of the cabi-
net. See the 24 Volt Thermostat Wiring section of this manual for
typical low voltage wiring connections. A minimum 18 AWG wire
must be used for installations up to 50 feet and 16 AWG wire for
installations over 50 feet.
OO
OO
OPERATIONPERATION
PERATIONPERATION
PERATION ONON
ONON
ON 208 V 208 V
208 V 208 V
208 VOLTOLT
OLTOLT
OLT S S
S S
SUPPLYUPPLY
UPPLYUPPLY
UPPLY
The unit transformer is factory connected for 230 V operation. If
unit is to operate on 208 V, disconnect the red wire from terminal
3 of the unit transformer and connect them to terminal 2 of the
unit transformer.
24 V24 V
24 V24 V
24 VOLTOLT
OLTOLT
OLT T T
T T
THERMOSTATHERMOSTAT
HERMOSTATHERMOSTAT
HERMOSTAT W W
W W
WIRINGIRING
IRINGIRING
IRING
NONO
NONO
NOTE:TE:
TE:TE:
TE: Wire routing must not interfere with the circulator
blower operation or routine maintenance.
The modular blower’s integrated control module provides ter-
minals for “Y1” and “Y2” and “W1” and “W2” thermostat connec-
tions. This allows the modular blower to support the systems
shown in the table below. Refer to the following figures for typi-
cal connections to the integrated control module. Thermostat
wiring entrance holes are located in the top of the blower. Wire
routing must not interfere with circulator blower operation or
routine maintenance.
COOLING HEAT PUMP HEATING ELECTRIC HEATING
1-STAGE ------ 1- or 2-STAGE
2-STAGE ------ 1- or 2-STAGE
1-STAGE 1-STAGE ------
2-STAGE 2-STAGE ------
1-STAGE 1-STAGE 1- or 2-STAGE
2-STAGE 2-STAGE 1- or 2-STAGE
NONO
NONO
NOTE:TE:
TE:TE:
TE: A removable plug connector is provided with the control
to make thermostat wire connections. This plug may be removed,
wire connections made to the plug, and replaced. It is strstr
strstr
stronglyongly
onglyongly
ongly
recommended that multiple wires into a single terminal be
twisted together prior to inserting into the plug connector.
Failure to do so may result in intermittent operation.
Y1
12RC
C
Modular Blower
Integrated Control Module
Typical Two-Stage Cool, Two-Stage Heat
Thermostat
Dehumidistat
[Optional]
G
W1 W2 Y1 Y2
O
Y2
W1 W2
Y1 Y2
Remote Condensing Unit
(Two-Stage AC)
NEU
HOT
DEHUM
CR
G
Figure 7-Typical Two-Stage Cooling with Two-Stage Heating
5
Y1
12RC
C
Modular Blower
Integrated Control Module
Typical Two-Stage Cool,
Two-Stage Heat
Heat Pump Thermostat
Dehumidistat
[Optional]
G
W1 W2 Y1 Y2
O
DEHUM
RY2
W2
Y1 Y2
Remote Condensing Unit
(Two-Stage HP)
NEU
HOT
O
EMR
W1
O
C
G
Figure 8-Typical Two Stage Heat Pump heating and Auxiliary/
Emergency Heating
24 V24 V
24 V24 V
24 VOLTOLT
OLTOLT
OLT D D
D D
DEHUMIDISTATEHUMIDISTAT
EHUMIDISTATEHUMIDISTAT
EHUMIDISTAT W W
W W
WIRINGIRING
IRINGIRING
IRING
The optional usage of a dehumidistat allows the modular blower’s
circulator blower to operate at a slightly lower speed during a
combined thermostat call for cooling and dehumidistat call for
dehumidification. This lower blower speed enhances dehumidi-
fication of the conditioned air as it passes through the AC coil.
For proper function, a dehumidistat applied to this modular
blower must operate on 24 VAC and utilize a switch which opens
on humidity rise.
To install/connect a dehumidistat:
1. Turn OFF power to modular blower.
2. Secure the dehumidistat neutral wire (typically the white
lead) to the screw terminal marked “DEHUM” on the
modular blower’s integrated control module.
3. Secure the dehumidistat hot wire (typically the black lead)
to the screw terminal marked “R” on the modular blower’s
integrated control module.
4. Secure the dehumidistat ground wire (typically the green
lead) to the ground screw on the modular blower. NONO
NONO
NOTE:TE:
TE:TE:
TE:
Ground wire may not be present on all dehumidistats.
5. Turn ON power to modular blower.
To enable the dehumidification function, move the dehumidifi-
cation dipswitch from OFF to ON.
7
8
ON OFF
DEHUM
Unused
Move to the ON position
to enable dehumidification
CC
CC
CIRCULATORIRCULATOR
IRCULATORIRCULATOR
IRCULATOR B B
B B
BLOWERLOWER
LOWERLOWER
LOWER
This modular blower is equipped with a multi-speed circulator
blower. This blower provides ease in adjusting blower speeds.
The Specification Sheet applicable to your model provides an air-
flow table, showing the relationship between airflow (CFM) and
external static pressure (E.S.P.), for the proper selection of heat-
ing and cooling speeds. The heating blower speed is shipped set
at “21 kW”, and the cooling blower speed is set at “D”. These blower
speeds should be adjusted by the installer to match the installa-
tion requirements so as to provide the correct electric heating
CFM and correct cooling CFM.
Use the CFM LED (green), adjacent to the integrated control mod-
ule electric heat connector to obtain an approximate airflow
quantity. The green CFM LED blinks once for each 100 CFM of
airflow.
1. Determine the tonnage of the cooling system installed
with the modular blower. If the cooling capacity is in BTU/
hr divide it by 12,000 to convert capacity to TONs.
Example:Example:
Example:Example:
Example: Cooling Capacity of 30,000 BTU/hr.
30,000/12,000 = 2.5 Tons
2. Determine the proper air flow for the cooling system. Most
cooling systems are designed to work with air flows
between 350 and 450 CFM per ton. Most manufacturers
recommend an air flow of about 400 CFM per ton.
Example:Example:
Example:Example:
Example: 2.5 tons X 400 CFM per ton = 1000 CFM
The cooling system manufacturer’s instructions must be checked
for required air flow. Any electronic air cleaners or other devices
may require a specific airflow; consult installation instructions of
those devices for requirements.
3. Knowing the modular blower model, locate the high stage
cooling air flow charts in the Specification Sheet applicable
to your model. Look up the cooling air flow determined
in step 2 and find the required cooling speed and
adjustment setting.
Example:Example:
Example:Example:
Example: A MBVC1200 modular blower installed with a
2.5 ton air conditioning system. The air flow needed is
1000 CFM. Looking at the cooling speed chart for
MBVC1200, find the air flow closest to 1000 CFM. A cooling
airflow of 1000 CFM can be attained by setting the cooling
speed to “C” and the adjustment to “0” (no adjustment).
4. Locate the blower speed selection DIP switches on the
integrated control module. Select the desired “cooling”
speed tap by positioning switches 1 and 2 appropriately.
Select the desired “adjust” tap by positioning switches 3
and 4 appropriately. Refer to the following figure for
switch positions and their corresponding taps. Verify CFM
by counting the number of times the green CFM LED
blinks.
5. Continuous fan speed is 30% of the modular blower’s
maximum airflow capability.
Example:Example:
Example:Example:
Example: If the modular blower’s maximum airflow
capability is 2000 CFM, the continuous fan speed will be
0.30 x 2000 CFM = 600 CFM.
6
1
2
1
2
1
2
1
2
OFF OFF OFF OFFON ON ON ON
Tap A Tap B
Cooling Air flow Speed Tap (*indicates factory setting)
Tap C Tap D*
3
4
Normal* +10%
Air flow Adjust Taps (*indicates factory setting)
-10% Normal
OFF OFF OFF OFFON ON ON ON
3
4
3
4
3
4
6. The multi-speed circulator blower also offers several
custom ON/OFF ramping profiles. These profiles may be
used to enhance cooling performance and increase
comfort level. The ramping profiles are selected using DIP
switches 5 and 6. Refer to the following figure for switch
positions and their corresponding taps. Refer to the bullet
points below for a description of each ramping profile.
Verify profile selection by counting the green CFM LED
blinks and timing each step of the ramping profile.
• Profile A provides only an OFF delay of one (1) minute at
100% of the cooling demand airflow.
OFF
100% CFM 100% CFM
1 min
OFF
• Profile B ramps up to full cooling demand airflow by first
stepping up to 50% of the full demand for 30 seconds.
The motor then ramps to 100% of the required airflow. A
one (1) minute OFF delay at 100% of the cooling airflow.
50% CFM
1/2 min
100% CFM 100% CFM
1 min
OFF OFF
• Profile C ramps up to 82% of the full cooling demand
airflow and operates there for approximately 7 1/2
minutes. The motor then steps up to the full demand
airflow. Profile C also has a one (1) minute 100% OFF
delay.
100% CFM
OFF OFF
• Profile D ramps up to 50% of the demand for 1/2 minute,
then ramps to 82% of the full cooling demand airflow
and operates there for approximately 7 1/2 minutes. The
motor then steps up to the full demand airflow. Profile
D has a 1/2 minute at 50% airflow OFF delay.
OFF
OFF
5
6
5
6
5
6
5
6
OFF OFF OFF OFFON ON ON ON
Tap A Tap B Tap C Tap D*
7. If an electric heater kit has been installed, determine the
heater kilowatt (kW) rating. Find the heater size in the
table below. Set dipswitches 9, 10, and 11 for the installed
heater as shown in the table below. The adjust setting
(already established by the cooling speed selection) also
applies to the electric heater kit airflow. Thus, the electric
heater airflow is adjusted by the same amount. Verify
selected CFM by counting the green CFM LED blinks.
9
10
OFF OFF OFF OFFON ON ON ON
21 kW* 20 kW
Electric Heating Air Flow (*indicates factory setting)
15 kW 10 kW
OFF OFF OFF OFFON ON ON ON
8 kW 6 kW 5 kW 3 kW
11
9
10
11
9
10
11
9
10
11
9
10
11
9
10
11
9
10
11
9
10
11
7
Cool Adjust Profile
Selection Selection Selection
Switches Switches Switches
D ON ON ON ON ON ON
C OFF ON OFF ON OFF ON
(1) Select model and desired
high stage cooling airflow. Determine the corresponding tap
( A, B, C, or D ). Set dip switches 1 and 2 to the appropriate
ON / OFF positions. (2) Select model and installed electric
heater size. Set switches 9, 10, and 11 to the appropriate
ON/OFF positions. (3) Select the airflow adjustment factor tap
A and D are 0%; Tap B is +10%; Tap C -10%. Set dip switches 3
and 4 to the appropriate ON / OFF positions.
Select desired Comfort Mode profile
(see profiles above). Set switches 5 and 6 to the appropriate
ON / OFF positions.
A ------- -------- 60 sec/100%
B ON OFF ON OFF ON OFF
TAP 1 2 3 4 5 6
To set airflow:
D 30 sec/50% 7.5 min/82% 30 sec/50%
A OFF OFF OFF OFF OFF OFF
0140A00045
Speed Selection Dip Switches
B ------- 30 sec/50% 60 sec/100%
To set Comfort Mode:
Profiles Pre-Run Short-Run OFF Delay
C ------- 7.5 min/82% 60 sec/100%
Model Tap Low Stage High Stage
Cool Cool
MBVC1200
*
A 400 600
B 540 800
C 670 1000
D 800 1200
MBVC1600
*
A 670 1000
B 800 1200
C 940 1400
D 1070 1600
*
MBVC2000
A 800 1200
B 1070 1600
C 1200 1800
D 1340 2000
Htr Kw 9 10 11 MBVC1200* MBVC1600* MBVC2000*
3 ON ON ON 600 800 800
5 ON ON OFF 600 800 800
6 ON OFF ON 635 800 800
8 ON OFF OFF 740 1000 1000
10 OFF ON ON 1000 1000 1200
15 OFF ON OFF 1400 1500 1500
20 OFF OFF ON NR NR 2000
Air Flow Table
TT
TT
T
RR
RR
ROUBLESHOOOUBLESHOO
OUBLESHOOOUBLESHOO
OUBLESHOOTINGTING
TINGTING
TING
EE
EE
ELECTROSTATICLECTROSTATIC
LECTROSTATICLECTROSTATIC
LECTROSTATIC D D
D D
DISCHARGEISCHARGE
ISCHARGEISCHARGE
ISCHARGE (ESD) P (ESD) P
(ESD) P (ESD) P
(ESD) PRECAUTIONSRECAUTIONS
RECAUTIONSRECAUTIONS
RECAUTIONS E E
E E
ELECTROSTATICLECTROSTATIC
LECTROSTATICLECTROSTATIC
LECTROSTATIC
DD
DD
DISCHARGEISCHARGE
ISCHARGEISCHARGE
ISCHARGE (ESD) P (ESD) P
(ESD) P (ESD) P
(ESD) PRECAUTIONSRECAUTIONS
RECAUTIONSRECAUTIONS
RECAUTIONS
NONO
NONO
NOTE:TE:
TE:TE:
TE: Discharge body’s static electricity before touching unit.
An electrostatic discharge can adversely affect electrical
components.
Use the following precautions during modular blower installa-
tion and servicing to protect the integrated control module from
damage. By putting the modular blower, the control, and the
person at the same electrostatic potential, these steps will help
avoid exposing the integrated control module to electrostatic dis-
charge. This procedure is applicable to both installed and unin-
stalled (ungrounded) blowers.
1. Disconnect all power to the blower. Do not touch the
integrated control module or any wire connected to the
control prior to discharging your body’s electrostatic
charge to ground.
2. Firmly touch a clean, unpainted, metal surface of the
modular blower near the control. Any tools held in a
person’s hand during grounding will be discharged.
3. Service integrated control module or connecting wiring
following the discharge process in step 2. Use caution not
to recharge your body with static electricity; (i.e., do not
move or shuffle your feet, do not touch ungrounded
objects, etc.). If you come in contact with an ungrounded
object, repeat step 2 before touching control or wires.
4. Discharge your body to ground before removing a new
control from its container. Follow steps 1 through 3 if
installing the control on a blower. Return any old or new
controls to their containers before touching any
ungrounded object.
DD
DD
DIAGNOSTICIAGNOSTIC
IAGNOSTICIAGNOSTIC
IAGNOSTIC C C
C C
CHARTHART
HARTHART
HART
HIGHVOLTAGE!
T
O
AVOID
PERSONAL
INJURY
OR
DEATH
DUE
TO
ELECTRICAL
SHOCK
,
DISCONNECT
ELECTRICAL
POWER
BEFORE
PERFORMING
ANY
SERVICE
OR
MAINTENANCE
.
WARNING
Refer to the Troubleshooting Chart at the end of this manual for
assistance in determining the source of unit operational prob-
lems. The red diagnostic LED blinks to assist in troubleshooting
the unit. The number of blinks refers to a specific fault code.
FAULT RECALL
The integrated control module is equipped with a momentary
push-button switch that can be used to display the last six faults
on the red diagnostic LED. The control must be in Standby Mode
(no thermostat inputs) to use the feature. Depress the push-but-
ton for approximately two seconds and less than five seconds.
The LED display will then display the six most recent faults be-
ginning with the most recent fault and decrementing to the least
recent fault. The faults may be cleared by depressing the button
for greater than five seconds.
NONO
NONO
NOTE:TE:
TE:TE:
TE: Consecutively repeated faults are displayed a maximum
of three times.
CC
CC
C
OMFOMF
OMFOMF
OMFOROR
OROR
ORTT
TT
T
NN
NN
N
ETET
ETET
ET
™ S™ S
™ S™ S
™ S
YY
YY
YSTEMSTEM
STEMSTEM
STEM
OO
OO
OVERVIEWVERVIEW
VERVIEWVERVIEW
VERVIEW
The ComfortNet™ system (or CT™ system) is a system that includes
a ComfortNet™ compatible modular blower and air conditioner
or heat pump with a CTK01AA thermostat. Any other system con-
figurations are considered invalid ComfortNet™ systems and must
be connected as a traditional (or legacy) system (see Electrical
8
Connections - 24 Volt Thermostat Wiring for wiring connections).
The table below compares the valid CT™ systems.
CT™ compatible
Modular Blower CT™ compatible
Air Conditioner Full CT™ system
benefits & features
CT™ compatible
Modular Blower CT™ compatible
Heat Pump Full CT™ system
benefits & features
A ComfortNet™ heating/air conditioning system differs from a
legacy/traditional system in the manner in which the indoor unit,
outdoor unit and thermostat interact with one another. In a tra-
ditional system, the thermostat sends commands to the indoor
and outdoor units via analog 24 VAC signals. It is a one-way com-
munication path in that the indoor and outdoor units typically
do not return information to the thermostat.
On the other hand, the indoor unit, outdoor unit, and thermostat
comprising a ComfortNet™ system “communicate” digitally with
one another. It is now a two-way communications path. The ther-
mostat still sends commands to the indoor and outdoor units.
However, the thermostat may also request and receive informa-
tion from both the indoor and outdoor units. This information
may be displayed on the CT™ thermostat. The indoor and out-
door units also interact with one another. The outdoor unit may
send commands to or request information from the indoor unit.
This two-way digital communications between the thermostat
and subsystems (indoor/outdoor unit) and between subsystems
is the key to unlocking the benefits and features of the
ComfortNet™ system.
Two-way digital communications is accomplished using only two
wires. The thermostat and subsystem controls are powered with
24 VAC Thus, a maximum of 4 wires between the equipment and
thermostat is all that is required to operate the system.
CTK01AA WCTK01AA W
CTK01AA WCTK01AA W
CTK01AA WIRINGIRING
IRINGIRING
IRING
NONO
NONO
NOTE:TE:
TE:TE:
TE: Refer to section Electrical Connections for 208/230 volt
line connections to the modular blower.
NONO
NONO
NOTE:TE:
TE:TE:
TE: A removable plug connector is provided with the control
to make thermostat wire connections. This plug may be removed,
wire connections made to the plug, and replaced. It is strstr
strstr
stronglyongly
onglyongly
ongly
recommended that multiple wires into a single terminal be
twisted together prior to inserting into the plug connector. Failure
to do so may result in intermittent operation.
Typical 18 AWG thermostat wire may be used to wire the system
components. However, communications reliability may be im-
proved by using a high quality, shielded, twisted pair cable for
the data transmission lines. In either case, 100 feet is the maxi-
mum length of wire between indoor unit and outdoor unit, or
between indoor unit and thermostat.
FOUR-WIRE INDOOR AND OUTDOOR WIRING
Typical wiring will consist of four wires between the indoor unit
and outdoor unit and between the indoor unit and thermostat.
The required wires are: (a) data lines, 1 and 2; (b) thermostat “R”
(24 VAC hot) and “C” (24 VAC common).
12RC
12RC
12RC
CTK01AA
Thermostat
CT™ Compatible
Modular Blower
Integrated Control Module
CT™ Compatible AC/HP
Integrated Control Module
System Wiring Using Four-Wires
TWO-WIRE OUTDOOR, FOUR-WIRE INDOOR WIRING
Two wires only may be utilized between the indoor and outdoor
units. For this wiring scheme, only the data lines, 1 and 2, are
required between the indoor and outdoor units. A 40VA,
208/230 VAC to 24 VAC transformer must be installed in the out-
door unit to provide 24 VAC power to the outdoor unit’s elec-
tronic control. The transformer is included with the CTK01AA kit.
See kit instructions for mounting and wiring instructions. Four
wires are required between the indoor unit and thermostat.
12RC
12RC
12
RC
CTK01AA
Thermostat
CT™ Compatible
Modular Blower
Integrated Control Module
CT™ Compatible
AC/HP Integrated
Control Module
40VA Transformer (included in
CTK01AA kit)
208/230 VAC 24 VAC
System Wiring using Two-Wires between Furnace and AC/HP
and Four-Wires between Furnace and Thermostat
CC
CC
COMFORTOMFORT
OMFORTOMFORT
OMFORTNN
NN
NETET
ETET
ET™ S™ S
™ S™ S
™ SYSTEMYSTEM
YSTEMYSTEM
YSTEM A A
A A
ADVANCEDDVANCED
DVANCEDDVANCED
DVANCED F F
F F
FEATURESEATURES
EATURESEATURES
EATURES
The ComfortNet™ system permits access to additional system
information, advanced setup features, and advanced diagnostic/
troubleshooting features. These advanced features are organized
into a menu structure. The menus are accessed and navigated as
described below.
9
ACCESSING AND NAVIGATING THE ADVANCED FEATURES
MENUS
The advanced system features are accessed using the
ComfortNet™ thermostat. These advanced features are accessed
as follows:
• On the CT™ thermostat Home Screen Display, touch the
MM
MM
Menuenu
enuenu
enu key to display additional key choices.
• Touch and hold the II
II
Installer Cnstaller C
nstaller Cnstaller C
nstaller Configonfig
onfigonfig
onfig key for
approximately 3 seconds to enter the Thermostat
Options Configuration menu.
• Touch and hold the II
II
Installer Cnstaller C
nstaller Cnstaller C
nstaller Configonfig
onfigonfig
onfig key again for
approximately 3 seconds to enter the Advanced Installer
Configuration menu.
Clean Display Installer
Config
Set Time Set
Schedule
Run
Schedule
Upon entering the advanced menus, the Advanced Fault Menu
is displayed. The display will change to the Fault Screen and indi-
cate any faults that may be present in the indoor or outdoor
equipment. If a fault is present, the Fault Screen will show the
equipment and an error code with a description of the fault.
Touch
_
or
+
keys to view the fault status of any remaining
equipment. The text “NO F“NO F
“NO F“NO F
“NO FAA
AA
AULUL
ULUL
UL
TT
TT
TSS
SS
S””
””
” will be scrolled if no errors are
present.
Menu
Run
Schedule
Call for Service
Advanced
Menu
Run
Schedule
Call for Service
Advanced
Touch the
+
or
_
to step through the list of installed equip-
ment, including the thermostat. Touch the II
II
Installer Cnstaller C
nstaller Cnstaller C
nstaller Configonfig
onfigonfig
onfig key
to enter the submenus for the equipment displayed. The text
““
““
“WORKINGWORKING
WORKINGWORKING
WORKING””
””
” will be displayed in the scrolling display area while
the data is being retrieved. The first sub-menu is then displayed.
See tables below for listing of modular blower submenus.
Touch the
+
or
_
to step through the list of submenus and
view settings. If a setting can be adjusted,
_
and
+
keys will
appear. Use the
_
or
+
keys to adjust the setting to the desired
value. Touch the
+
or
_
to step to the next item. ““
““
“WORKINGWORKING
WORKINGWORKING
WORKING””
””
”
will appear as the settings are being updated. “DONE”“DONE”
“DONE”“DONE”
“DONE” will ap-
pear to indicate the change was accepted. If the change is not
accepted, the display will show “F“F
“F“F
“F
AILAIL
AILAIL
AIL
””
””
” then revert to the Fault
Screen.
Some parameters being displayed switch between the item name
and the item value. Touch the HoldHold
HoldHold
Hold key to momentarily stop the
display from switching.
To exit an equipment submenu and revert back to the equipment
menus, touch the MM
MM
Menuenu
enuenu
enu key. Touch Menu again to revert back to
the Thermostat Options Menu. Touch the Run SRun S
Run SRun S
Run Schedulechedule
chedulechedule
chedule key to
step out of all menus and back to the CT™ thermostat Home
Screen Display.
10
MODULAR BLOWER ADVANCED FEATURES MENUS
Submenu Item Indication (for Display Only; not User Modifiable)
Electric Heat Size (HTR KW) Displays the size in kW of the selected electric heaters.
Motor HP (1/2, 3/4, or 1 MTR HP) Displays the modular blower indoor blower motor horsepower.
Heat ON Delay (HT ON) Displays the electric heat indoor blower ON delay.
Heat OFF Delay (HT OFF) Displays the electric heat indoor blower OFF delay.
CONFIGURATION
Submenu Item Indication/User Modifiable Options Comments
Fault 1 (FAULT #1) Most recent fault For display only
Fault 2 (FAULT #2) Next most recent fault For display only
Fault 3 (FAULT #3) Next most recent fault For display only
Fault 4 (FAULT #4) Next most recent fault For display only
Fault 5 (FAULT #5) Next most recent fault For display only
Fault 6 (FAULT #6) Least recent fault For display only
Clear Fault History (CLEAR) NO or YES Selecting “YES” clears the fault
history
NOTE: Consecutively repeated faults are shown a maximum of 3 times
DIAGNOSTICS
Submenu Item Indication (for Display Only; not User Modifiable)
Model Number (MOD NUM) Displays the modular blower model number
Serial Number (SER NUM) Displays the modular blower serial number (Optional)
Software (SOFTWARE) Displays the application software revision
IDENTIFICATION
Submenu Item User Modifiable Options Comments
Heat Airflow Trim (HT
TRM
)
-10% to +10% in 2% increments,
default is 0% Trims the electric heating airflow by the
selected amount.
SET-UP
Submenu Item Indication (for Display Only; not User Modifiable)
Mode (MODE) Displays the current modular blower operating mode
CFM (CFM) Displays the airflow for the current operating mode
STATUS
11
THERMOSTAT MENU
If this modular blower is installed with a CT™ compatible heat
pump, the system is recognized as a heat pump system. The elec-
tric heat disabled temperature and heat pump disabled tempera-
ture must be set via the thermostat advanced menu. Navigate to
the THERMOSTTHERMOST
THERMOSTTHERMOST
THERMOSTAA
AA
ATT
TT
T menu. Press the INSTINST
INSTINST
INSTALLER CALLER C
ALLER CALLER C
ALLER CONFIGONFIG
ONFIGONFIG
ONFIG key. Navi-
gate to the SESE
SESE
SETUPTUP
TUPTUP
TUP menu and press the INSTINST
INSTINST
INSTALLER CALLER C
ALLER CALLER C
ALLER CONFIGONFIG
ONFIGONFIG
ONFIG but-
ton. Navigate to AA
AA
AUX HT LUX HT L
UX HT LUX HT L
UX HT LOCKOCK
OCKOCK
OCKOUTOUT
OUTOUT
OUT. Adjust the electric heat dis-
abled temperature to the desired setting using the back/forward
arrows. Navigate to HP BAL PNTHP BAL PNT
HP BAL PNTHP BAL PNT
HP BAL PNT. Adjust the heat pump disabled
temperature to the desired setting using the back/forward ar-
rows.
DIAGNOSTICS
Accessing the modular blower’s diagnostics menu provides ready
access to the last six faults detected by the modular blower. Faults
are stored most recent to least recent. Any consecutively repeated
fault is stored a maximum of three times. Example: A clogged
return air filter causes the modular blower’s motor to repeatedly
enter a limiting condition. The control will only store this fault
the first three consecutive times the fault occurs. Navigate to the
diagnostics menu as described above in Accessing and Navigat-
ing the Advanced Features Menus.
NONO
NONO
NOTE:TE:
TE:TE:
TE: It is highly recommended that the fault history be cleared
when performing maintenance or servicing the modular blower.
NN
NN
NETWORKETWORK
ETWORKETWORK
ETWORK TROUBLESHOOTINGTROUBLESHOOTING
TROUBLESHOOTINGTROUBLESHOOTING
TROUBLESHOOTING
Communications is achieved by taking the difference between a
positive dc signal and a negative dc signal. The positive dc signal
is termed “data 1” or “1”. Data 1 is positive with respect to ground
(or common). The negative dc signal is termed “data 2” or “2”.
Data 2 is negative with respect to ground (or common).
Data 1 should be approximately 2.8 volts dc. Data 2 should be
approximately 2.2 volts dc. The voltage difference between data
1 and data 2 should be approximately 0.6 volts dc.
Verify that the bus BIAS and TERM dipswitches are in the ON po-
sition. See below.
1
2
ON OFF
3
BIAS
BIAS
TERM
The ComfortNet™ system is a fully communicating system, and
thus, constitutes a network. Occasionally the need to trouble-
shoot the network may arise. The integrated control has some
on-board tools that may be used to troubleshoot the network.
These tools are: red communications LED, green receive (Rx) LED,
and LEARN button.
• Red communications LED – Indicates the status of the
network. The table below indicates the LED status and
the corresponding potential problem.
• Green receive LED – Indicates network traffic. The table
below indicates the LED status and the corresponding
potential problem.
• Learn button – Used to reset the network. Depress the
button for approximately 2 seconds to reset the
network.
SS
SS
SYSTEMYSTEM
YSTEMYSTEM
YSTEM T T
T T
TROUBLESHOOTINGROUBLESHOOTING
ROUBLESHOOTINGROUBLESHOOTING
ROUBLESHOOTING
NONO
NONO
NOTE:TE:
TE:TE:
TE: Refer to the instructions accompanying the CT™
compatible outdoor AC/HP unit for troubleshooting information.
Refer to the Troubleshooting Chart in the Appendix for a listing
of possible modular blower error codes, possible causes and cor-
rective actions.
12
LED LED Status Indication Possible Causes Corrective Action(s) Notes & Cautions
Off x Normal condition x None x None x None
1 Flash x Communications
Failure
x Communications Failure x Depress Learn Button
x Verify that bus BIAS
and TERM dipswitches
are in the ON position.
x Depress once quickly
for a power-up reset
x Depress and hold for 2
seconds for an out-of-
box reset
Red
Communications
LED
2 Flashes x Out-of-box reset x Control power up
x Learn button depressed
x None x None
Off x No power
x Communications error
x No power to modular
blower
x Open fuse
x Communications error
x Check fuses and circuit
breakers; replace/reset
x Replace blown fuse
x Check for shorts in low
voltage wiring in
modular blower/system
x Reset network by
depressing learn button
x Check data 1/ data 2
voltages
x Turn power OFF prior
to repair.
x See Network
Troubleshooting
section.
1 Steady
Flash
x No network found x Broken/ disconnected
data wire(s)
x Modular blower is
installed as a legacy/
traditional system
x Check communications
wiring (data 1/ data 2
wires)
x Check wire connections
at terminal block
x Verify modular blower
installation type
(legacy/ traditional or
communicating)
x Check data 1/ data 2
voltages
x Turn power OFF prior
to repair
x Verify wires at
terminal blocks are
securely twisted
together prior to
inserting into terminal
block
x See Network
Troubleshooting
section
Rapid
Flashing
x Normal network
traffic
x Control is “talking” on
network as expected
x None x None
Green Receive
LED
On Solid x Data 1/ Data 2 miss-
wire
x Data 1 and data 2 wires
reversed at modular
blower, thermostat, or
CT™ compatible
outdoor AC/HP
x Short between data 1
and data 2 wires
x Short between data 1 or
data 2 wires and R
(24VAC) or C (24VAC
common)
x Check communications
wiring (data 1/ data 2
wires)
x Check wire connections
at terminal block
x Check data 1/ data 2
voltages
x Turn power OFF prior
to repair
x Verify wires at
terminal blocks are
securely twisted
together prior to
inserting into terminal
block
x See Network
Troubleshooting
section
13
APPENDIX A
14
TROUBLESHOOTING INFORMATION: UNITARY DIAGNOSTIC CODES
ComfortNet™
Thermostat Only
Symptoms of Abnormal Operation (Legacy
& ComfortNet™ Thermostat)
Diagnostic/Status
LED Codes
Fault Description
Message Code
Possible Causes
Corrective Actions
Notes & Cautions
x LED display is ON continuously ON
x Normal operation None None
x Normal operation x None x Normal operation
x Electric heaters fail to energize on a call for
W1 or Auxiliary/Emergency heat
x Integrated control module LED display
provides the indicated error code.
x ComfortNet™ thermostat “Call for
Service” icon illuminated
x ComfortNet™ thermostat scrolls “Check
Air Handler” message
1 Flash x Heater kit selected via
dipswitches is too large
for heater kits specified
in shared data set
HTR TOO
LARGE
Ec x Heater kit selected via
dipswitches is too large for heater
kits in shared data set
x Verify electric heat dipswitch
settings
x Verify the installed electric
heater is valid for the modular
blower. Check nameplate or
Specification Sheet applicable to
your model* for allowable heater
kit(s).
x Verify shared data set is correct
for the specific model. Re-
populate data using correct
memory card if required.
x Turn power OFF prior to
repair.
x Use memory card for the
specific model.
x Insert memory card
BEFORE turning power
ON. Memory card may be
removed after data is
loaded.
x Electric heat airflow is higher than
expected on a call for W1 or
Auxiliary/Emergency heat
x Integrated control module LED display
provides the indicated error code.
1 Flash x Heater kit selected via
dipswitches is too small
for heater kits specified
in shared data set
HTR TOO
SMALL
Ec x Heater kit selected via
dipswitches is too small for heater
kits in shared data set
x Verify electric heat dipswitch
settings
x Verify the installed electric
heater is valid for the modular
blower. Check nameplate or
Specification Sheet applicable to
your model* for allowable heater
kit(s).
x Verify shared data set is correct
for the specific model. Re-
populate data using correct
memory card if required.
x Turn power OFF prior to
repair.
x Use memory card for the
specific model.
x Insert memory card
BEFORE turning power
ON. Memory card may be
removed after data is
loaded.
x Electric heat airflow is higher than
expected on a call for W1 or
Auxiliary/Emergency heat
x Integrated control module LED display
provides the indicated error code.
1 Flash x Heater kit selected via
dipswitches does not
heater kits specified in
shared data set
NO HTR
MATCH
Ec x Heater kit selected via
dipswitches is doesn’t match
heater kits in shared data set
x Verify electric heat dipswitch
settings
x Verify the installed electric
heater is valid for the modular
blower. Check nameplate or
Specification Sheet applicable to
your model* for allowable heater
kit(s).
x Verify shared data set is correct
for the specific model. Re-
populate data using correct
memory card if required.
x Turn power OFF prior to
repair.
x Use memory card for the
specific model.
x Insert memory card
BEFORE turning power
ON. Memory card may be
removed after data is
loaded.
x No modular blower operation.
x Integrated control module LED display
provides the indicated error code.
x ComfortNet™ thermostat displays “Battery
Power”
5 Flashes x Open Fuse Not
Displayed
Not
Displayed
x Short in low voltage wiring x Locate and correct short in low
voltage wiring
x Turn power OFF prior to
repair.
x Replace fuse with 3-amp
automotive type
x Modular blower fails to operate
x Integrated control module LED display
provides no signal.
x ComfortNet™ thermostat “Call for
Service” icon illuminated
x ComfortNet™ thermostat scrolls “Check
Air Handler” message
None x No 208/230 volt power
to modular blower or no
24 volt power to
integrated control
module
x Blown fuse or circuit
breaker
x Integrated control
module has an internal
fault.
INTERNAL
FAULT
EE x Manual disconnect switch OFF or
24 volt wire improperly
connected or loose
x Blown fuse or circuit breaker
x Integrated control module has an
internal fault
x Assure 208/230 volt and 24 volt
power to modular blower and
integrated control module.
x Check integrated control module
fuse (3A). Replace if necessary.
x Check for possible shorts in
208/230 volt and 24 volt circuits.
Repair as necessary.
x Replace bad integrated control
module.
x Turn power OFF prior to
repair.
x Replace integrated control
module fuse with 3A
automotive fuse.
x Replace integrated control
module with correct
replacement part
x Read precautions in
“Electrostatic Discharge”
section of manual.
15
TROUBLESHOOTING INFORMATION: UNITARY DIAGNOSTIC CODES
ComfortNet™
Thermostat Only
Symptoms of Abnormal Operation
(Legacy & ComfortNet™ Thermostat) Diagnostic/Status
LED Codes Fault Description
Message Code
Possible Causes Corrective Actions Notes & Cautions
x Modular blower fails to operate.
x Integrated control module LED display
provides indicated error code.
x ComfortNet™ thermostat “Call for
Service” icon illuminated.
x ComfortNet™ thermostat scrolls
“Check Air Handler” message.
9 Flashes x Data not yet on
network.
NO NET
DATA
d0 x Modular blower does not
contain any shared data.
x Populate shared data set
using memory card.
x Turn power OFF prior to
repair
x Use memory card for
the specific model.
x Insert memory card
BEFORE turning power
ON. Memory card may
be removed after data is
loaded.
x Error code will be
cleared once data is
loaded.
x Operation different than expected or no
operation.
x Integrated control module LED display
provides indicated error code.
x ComfortNet™ thermostat “Call for
Service” icon illuminated.
x ComfortNet™ thermostat scrolls
“Check Air Handler” message.
11 Flashes x Invalid memory card
data.
INVALID
MC DATA
d4 x Shared data set on memory
card has been rejected by
integrated control module
x Verify shared data set is
correct for the specific model.
Re-populate data using
correct memory card if
required.
x Turn power OFF prior to
repair
x Use memory card for
the specific model.
x Insert memory card
BEFORE turning power
ON. Memory card may
be removed after data is
loaded.
x Error code will be
cleared once data is
loaded.
16
TROUBLESHOOTING INFORMATION: UNITARY DIAGNOSTIC CODES
ComfortNet™
Thermostat Only
Symptoms of Abnormal Operation
(Legacy & ComfortNet™ Thermostat)
Diagnostic/Status
LED Codes
Fault Description
Message Code
Possible Causes
Corrective Actions
Notes & Cautions
x Modular blower fails to operate.
x Integrated control module LED display
provides indicated error code.
x ComfortNet™ thermostat “Call for
Service” icon illuminated.
x ComfortNet™ thermostat scrolls
“Check Air Handler” message.
6 Flashes x Circulator blower
motor is not running
when it should be
running.
MOTOR
NOT RUN
b0 x Loose wiring connection at
circulator motor power leads
or circulator motor power
leads disconnected.
x Failed circulator blower motor.
x Tighten or correct wiring
connection.
x Check circulator blower
motor. Replace if necessary.
x Turn power OFF prior to
repair
x Replace circulator motor
with correct
replacement part.
x Modular blower fails to operate.
x Integrated control module LED display
provides indicated error code.
x ComfortNet™ thermostat “Call for
Service” icon illuminated.
x ComfortNet™ thermostat scrolls
“Check Air Handler” message.
6 Flashes x Integrated control
module has lost
communications with
circulator blower
motor.
MOTOR
COMM
b1 x Loose wiring connection at
circulator motor control leads.
x Failed circulator blower motor.
x Failed integrated control
module.
x Tighten or correct wiring
connection.
x Check circulator blower
motor. Replace if necessary.
x Check integrated control
module. Replace if
necessary.
x Turn power OFF prior to
repair
x Replace circulator motor
with correct
replacement part.
x Replace integrated
control module with
correct replacement
part.
x Modular blower fails to operate.
x Integrated control module LED display
provides indicated error code.
x ComfortNet™ thermostat “Call for
Service” icon illuminated.
x ComfortNet™ thermostat scrolls
“Check Air Handler” message.
6 Flashes x Circulator blower
motor horse power in
shared data set does
not match circulator
blower motor horse
power.
MOTOR
MISMATCH
b2 x Incorrect circulator blower
motor in modular blower.
x Incorrect shared data set in
integrated control module.
x Verify circulator blower motor
horse power is the same
specified for the specific
modular blower model.
Replace if necessary.
x Verify shared data set is
correct for the specific model.
Re-populate data using
correct memory card if
required.
x Turn power OFF prior to
repair
x Replace motor with
correct replacement
part.
x Use memory card for
the specific model
x Insert memory card
BEFORE turning power
ON. Memory card may
be removed after data is
loaded. Turn power off
before removing
memory card.
x Error code will be
cleared once shared
data and motor horse
power match.
x Modular blower operates at reduced
performance.
x Airflow delivered is less than expected.
x Integrated control module LED display
provides indicated error code.
6 Flashes x Circulator blower
motor is operating in a
power, temperature, or
speed limiting
condition.
MOTOR
LIMITS
b3 x Blocked filters.
x Restrictive ductwork.
x Undersized ductwork.
x High ambient temperatures.
x Check filters for blockage.
Clean filters or remove
obstruction.
x Check ductwork for blockage.
Remove obstruction. Verify
all registers are fully open.
x Verify ductwork is
appropriately sized for
system. Resize/replace
ductwork if necessary.
x See "Installation Instructions"
for installation requirements.
x Turn power OFF prior to
repair.
x Modular blower fails to operate.
x Integrated control module LED display
provides indicated error code.
x ComfortNet™ thermostat “Call for
Service” icon illuminated.
x ComfortNet™ thermostat scrolls
“Check Air Handler” message.
6 Flashes x Circulator blower
motor senses a loss of
rotor control.
x Circulator blower
motor senses high
current.
MOTOR
TRIPS
b4 x Abnormal motor loading,
sudden change in speed or
torque, sudden blockage of
modular blower/coil air inlet or
outlet.
x High loading conditions,
blocked filters, very restrictive
ductwork, blockage of modular
blower/coil air inlet or outlet.
x Check filters, filter
grills/registers, duct system,
and modular blower/coil air
inlet/outlet for blockages.
x Turn power OFF prior to
repair.
17
TROUBLESHOOTING INFORMATION: UNITARY DIAGNOSTIC CODES
ComfortNet™
Thermostat Only
Symptoms of Abnormal Operation
(Legacy & ComfortNet™ Thermostat)
Diagnostic/Status
LED Codes
Fault Description
Message Code
Possible Causes
Corrective Actions
Notes & Cautions
x Modular blower fails to operate.
x Integrated control module LED display
provides indiacted error code.
x ComfortNet™ thermostat “Call for
Service” icon illuminated.
x ComfortNet™ thermostat scrolls
“Check Air Handler” message.
6 Flashes x Circulator blower
motor fails to start 10
consecutive times.
MTR
LCKD
ROTOR
b5 x Obstruction in circulator
blower housing.
x Seized circulator blower motor
bearings.
x Failed circulator blower motor.
x Check circulator blower for
obstructions. Remove and
repair/replace wheel/motor if
necessary.
x Check circulator blower motor
shaft rotation and motor.
Replace motor if necessary.
x Turn power OFF prior to
repair
x Replace motor with
correct replacement
part.
x Replace wheel with
correct replacement
part.
x Modular blower fails to operate.
x Integrated control module LED display
provides indicated error code.
x ComfortNet™ thermostat “Call for
Service” icon illuminated.
x ComfortNet™ thermostat scrolls
“Check Air Handler” message.
6 Flashes x Circulator blower
motor shuts down for
over or under voltage
condition.
x Circulator blower
motor shuts down due
to over temperature
condition on power
module.
MOTOR
VOLTS
b6 x High AC line voltage to
modular blower.
x Low AC line voltage to
modular blower.
x High ambient temperatures.
x Check power to modular
blower. Verify line voltage to
blower is within the range
specified on the modular
blower rating plate.
x See "Installation Instructions"
for installation requirements.
x Turn power OFF prior to
repair.
x Modular blower fails to operate.
x Integrated control module LED display
provides indicated error code.
x ComfortNet™ thermostat “Call for
Service” icon illuminated.
x ComfortNet™ thermostat scrolls
“Check Air Handler” message.
6 Flashes x Circulator blower
motor does not have
enough information to
operate properly.
x Motor fails to start 40
consecutive times.
MOTOR
PARAMS
b7 x Error with integrated control
module.
x Motor has a locked rotor
condition.
x Check integrated control
module. Verify control is
populated with correct shared
data set. See data errors
above for details.
x Check for locked rotor
condition (see error code
above for details).
x Turn power OFF prior to
repair.
x Replace with correct
replacement part(s).
x Use memory card for
the specific model.
x Insert memory card
BEFORE turning power
ON. Memory card may
be removed after data is
loaded. Turn power OFF
before removing
memory card.
x Modular blower operates at reduced
performance or operates on low stage
when high stage is expected.
x Integrated control module LED display
provides indicated error code.
6 Flashes x Airflow is lower than
demanded.
LOW ID
AIRFLOW
b9 x Blocked filters.
x Restrictive ductwork.
x Undersized ductwork.
x Check filters for blockage.
Clean filters or remove
obstruction.
x Check ductwork for blockage.
Remove obstruction. Verify
all registers are fully open.
x Verify ductwork is
appropriately sized for
system. Resize/replace
ductwork if necessary.
x Turn power OFF prior to
repair.
18
Wiring is subject to change, always refer to the wiring diagram on the unit for the most up-to-date wiring.
HIGH VOLTAGE!
DISCONNECT ALL POWER BEFORE SERVICING.
MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO DO SO
MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.
WARNING
2
7
GN
COOL
DELAY
RD
TERM
3
BL
R
D
8
GN
RD
B
K
ELEC
RD
9
2
3
BK BL
SEE NOTE 6
1
BK
BIAS UNUSED
BR
6
6
PL2
BL
5
BK
4
BIAS
7
9
8
3
ADJUST
5
LEARN
-
4
RD
DEHUM
SEE
NOTE
7
24
PL1
WH RD
SEE
NOTE 5
11
HEAT
AF
YL BK
BK
HTR1
8
L2
FL FL
RD
BK
WH
2
M7
YL
FL
RD
6
R
BL
HTR2
NOTE: WHEN INSTALLING HEATER KIT, ENSURE SPEED TAP DOES NOT EXCEED MINIMUM BLOWER SPEED (MBS) SPECIFIED FOR THE AIRHANDLER/HEATER
TL TL
TWO (2) ELEMENT ROWS
8
L1
BK
M4
M2
HTR2
R2
9
L2
RD
M1
3
BK
1
BK
M1
BK
BL
ONE (1) ELEMENT ROWS
TL
HTR3
TL
M2
M3
YL
HTR2
RD
FL
BL
L1
TL
L1
4
R2
HTR3
9
RD
8
RD
M4
R1
BK
M3
9
WH
BK
BL
M3
6
BK
RD
BK
PU
RD
6
4
BK
KIT COMBINATION ON THIS UNIT'S S&R PLATE. AFTER INSTALLING OPTIONAL HEAT KIT, MARK AN "X" IN THE PROVIDED ABOVE.
FL
M2
PU
R1
HTR4
TL
HTR1
FL
BK
M6
PU
HTR1
M1
2
WH
M1
5
PLM
BK
TL
BR
RD
BK
MARK ACCORDING TO NUMBER OF HEATER ELEMENT ROWS INSTALLED. NO MARK INDICATES NO HEAT KIT INSTALLED.
6
WH
7
M1
BK
9
TL
FL
YL
BR
1
PU
YL
BK
BL
BK
PLM
7
5
RD 7
M8
RD
2
BL
BL
L2
TL
THREE (3) ELEMENT ROWS
RD
7
3
1
FL
L2
BL
RD
4
L1
L1
L2
R
M2
PLM
2
M5
5
1
4
HTR1
M2
FOUR (4) ELEMENT ROWS
TL
FL
BK
5
RD
RD
L1
PLM
3
RD
BK
8
YL
RD
L2
BK
BK
3
RD
BL
FL
M4
RD
0140A00039 REV. A
BLWR
OVERCURRENT
TR
HEAT SEQUENCER R1
24 V THERMOSTAT CONNECTIONS
GN GREEN
TRANSFORMER
HEAT SEQUENCER R2
GND
FIELD GND
INTERNAL TO
TWO-STAGE INTEGRATED CONTROL MODULE TX (3)
DEHUM
C
W1 (1)
5
FIELD SPLICE
W1
CFM LED
R
Y1
NOTES:
LOW VOLTAGE (24V)
4
GND
W1
24 V
3 A
4
RX (2)
COLOR CODES:
Y2
TH
STATUS
LED
5. TO RECALL THE LAST 6 FAULTS, MOST RECENT TO LEAST RECENT,
DEPRESS SWITCH FOR MORE THAN 2 SECONDS WHILE IN STANDBY (N
THERMOSTAT INPUTS).
208 VAC
Y1
+VDC (1)
TH
INTEGRATED CONTROL
INDOOR
PROT. DEVICE
2GND (4)
1
CTR
RESISTER
Y2
2
BR BROWN
DISCONNECT
L2
W2
YL YELLOW
1. PLACE RED WIRE ON TRANSFORMER TERMINAL 2 FOR 208 VAC
OPERATION.
7. DISCARD CONNECTOR PL1 WHEN INSTALLING OPTIONAL HEAT KIT.
COM
24V THERMOSTAT CONNECTIONS
4
RX LED
3. IF ANY OF THE ORIGINAL WIRE AS SUPPLIED WITH THE BLOWER MUST
BE REPLACED, IT MUST BE REPLACED WITH WIRING MATERIAL HAVING A
TEMPERATURE RATING OF AT LEAST 105°C. USE COPPER CONDUCTORS
ONLY.
HI VOLTAGE (230V)
3
6. BIAS AND TERM DIPSWITCHES MUST BE IN "ON" POSITION. RED
STATUS LED PROVIDES NETWORK STATUS. GREEN RX LED INDICATES
NETWORK TRAFFIC. USE LEARN BUTTON TO RESET NETWORK.
W2
2
1
O
INTEGRATED CONTROL MODULE
G
VT VIOLET
G
COM
L1
L2
GND
ECM MOTOR
HARNESS
JUNCTION
GND
208/230 VAC
FUSE 3 A
WH WHITE
1
4. UNIT MUST BE PERMANENTLY GROUNDED AND CONFORM TO N.E.C. AND
LOCAL CODES.
24 VAC
INDOOR
L1
40 VA TRANSFORMER, SEE NOTE 1
HI VOLTAGE FIELD
3
1
LOW VOLTAGE FIELD
3
2
40 VA
AIR
DIP SWITCHES
BLWR
FUSE
24 VAC
RD RED
DEHUM
PLUG CONNECTION
O
GY GRAY
TERMINAL
EQUIPMENT GND
PK PINK
BL BLUE
DIAGNOSTIC
LED
230 VAC
AIR
W2 (2)
RTO
MICRO
CIRCULATOR
CIRCULATOR
OR ORANGE
BK BLACK
2. MANUFACTURER'S SPECIFIED REPLACEMENT PARTS MUST BE USED
WHEN SERVICING.
CIRCULATOR BLOWER
COM
4 CIRCUIT HEATER
CONNECTOR
BL
GY
BKRD
GND
19
20
Quality Makes the Difference!
All of our systems are designed and manufactured with the same high quality standards regardless of size or efficiency. We
have designed these units to significantly reduce the most frequent causes of product failure. They are simple to service and
forgiving to operate. We use quality materials and components. Finally, every unit is run tested before it leaves the factory.
That’s why we know . . . TT
TT
Therher
herher
heree
ee
e’’’’’s No Bs No B
s No Bs No B
s No Bettett
ettett
etter Qer Q
er Qer Q
er Qualitualit
ualitualit
ualityy
yy
y.....
Visit our websites at www.goodmanmfg.com or www.amana-hac.com for information on:
•Products
•Warranties
•Customer Services
•Parts
•Contractor Programs and Training
•Financing Options
© 2009 Goodman Manufacturing Company, L.P.
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GOODMAN MBVC1200AA-1 Installation guide

Brand
GOODMAN
Model
MBVC1200AA-1
Category
Split-system air conditioners
Type
Installation guide
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