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Midmark PowerVac Wiring diagram

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FOR USE BY MIDMARK TRAINED TECHNICIANS ONLY
Service and
Parts Manual
Part No. 004-0494-00 Rev. AB1 (1/20/20)
Model Numbers:
PowerVac
®
P3
P5
P7
Single Vac Units
P6
P10
P14
Twin Vac Units
Earlier Version Current Version
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Style B
FOR USE BY MIDMARK TRAINED TECHNICIANS ONLY
Table Of Contents
GENERAL INFORMATION
Symbols .................................... iii
Ordering Parts ......................... iii
Serial Number Location .......... iii
Specifications ........................... iv
Model Identification /
Compliance Charts: ................. v
Warranty Information............... vi
TROUBLESHOOTING
Vacuum System ....................... A-2
Electrical System Operation
Power to System .................................
A-3
Wall Switch On ................................... A-4
Bottom Float contact Closed .............. A-5
Middle Float Contact Closed ............. A-6
Top Float Contact Closed ................... A-7
Liquid Evacuation Pump
(Accessory) ..............................
A-11
TESTING & REPAIR
Belt ............................................ B-2
Check Valve .............................. B-6
Vacuum Relief Valve................. B-9
Exhaust ..................................... B-12
Float .......................................... B-15
Low Voltage .............................. B-18
Door Limit Switch &
Circuit Breaker (On/Off Switch)
.............................................. B-21
Contactor .................................. B-26
Fuse ........................................... B-28
Relay.......................................... B-31
Transformer .............................. B-34
TESTING & REPAIR - continued
Fan ..........................................B-37
Gauge .....................................B-41
Motor ......................................B-43
Capacitor ................................B-44
Pump ......................................B-50
Liquid Evacuation Pump
(Accessory) ............................
B-53
Separator Tank .......................B-58
ACCESS PROCEDURES
Front Cover ............................ C-2
Top Cover ............................... C-3
Electrical Cover ...................... C-4
Back Cover (Previous Tank)... C-5
Back Cover (Large Tank) ........ C-6
WIRING DIAGRAMS
PowerVac
®
.................................................. D-2*
Liquid Evacuation Pump
(Accessory) ............................
D-4
EXPLODED VIEWS / PARTS LISTS
PowerVac
®
Single Models
(P3, P5, P7) .............................
E-2*
PowerVac
®
Twin Models
(P6, P10, P14) .........................
E-3*
Liquid Evacuation Pump
(Accessory) ...........................
E-4*
Section E
Section A
General Information
Section E
Section B -
cont.
Section D
Section C
Section B
* Indicates multiple pages due to model / serial number break(s)
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© Midmark Corporation 2006 SF-1873
General Information
0
5
1
0
1
5
2
0
2
5
-
3
0
Ordering Parts
The following information is required when ordering parts:
• Serial number & model number
• Part number for desired part.
[Refer to Exploded Views / Parts Lists section]
Non-warranty parts orders may be faxed to Midmark using
the Fax Order Form in the back of this manual.
For warranty parts orders, call Midmark's Technical Service
Department with the required information.
Hours: 8:00 am until 5:00 pm EST [Monday - Friday]
Phone: 1-(800)-Midmark
Model / Serial Number Location
General Information
iii
Symbols
In Section A, test the components in the order indicated.
(ex.
1st
then,
2nd
)
Refer to Section B for component testing procedures.
The symbols below may be used in this manual to represent
the operational status of table functions and components.
Indicates the function / component is working properly.
No action required.
Indicates the function / component is working,
but a problem exists.
Indicates the function / component is not working at all.
Rev 1/20/20
Tank Serial
Number
Base Serial
Number
WARNING
Indicates a potentially hazardous situation which
could result in serious injury if not avoided.
CAUTION
Indicates a potentially hazardous situation which may
result in minor or moderate injury if not avoided. It may also be
used to alert against unsafe practices.
Equipment Alert
Indicates a potentially hazardous situation which
could result in equipment damage if not avoided.
Front Cover
OFF
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© Midmark Corporation 2006 SF-1873
General Information
Weights, Dimensions, Electrical Specifications
Classifications: Class 1, Type B Applied Part
iv
Rev. 9/10/18
Model
P3
Model
P5
Model
P7
Model
P6
Model
P10
Model
P14
Evacuation Control
Box (Optional)
Vac Unit
H x W x D
Separator
H x W x D
Vac Unit - 355
Separator - 47
Vac Unit - 355
Separator - 47
Vac Unit - 355
Separator - 47
Vac Units - 710
Separators - 94
Vac Units - 710
Separators - 94
Vac Units - 710
Separators - 94
Recommended
Breaker Size (Amps)
(Min. 20 Amp ea.)
Inlet Connection Size
(in.)
1/8 A, 250V
Type T
1/8 A, 250V
Type T
1/8 A, 250V
Type T
1/8 A, 250V
Type T
1/8 A, 250V
Type T
1/8 A, 250V
Type T
1/4A, 250V, Type T
3A, 250V, Type T
Drain Connection Size
(in.)
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© Midmark Corporation 2006 SF-1873
General Information
Model Identification / Compliance Chart - PowerVac
®
v
Rev 9/10/18
UL 60601-1
CAN/CSA 22.2,
#601.1-M90
VAC Amps Cycles (Hz)
P3
PowerVac® Dry Vacuum
System - Single - 3 - 5 User
V x x 230 11.4 60
P5
PowerVac® Dry Vacuum
System - Single - 5 - 7 User
V x x 230 11.4 60
P7
PowerVac® Dry Vacuum
System - Single - 7 - 10 User
V x x 230 11.4 60
P6
PowerVac® Dry Vacuum
System - Twin - 6 - 10 User
V x x 230 22.8 60
P10
PowerVac® Dry Vacuum
System -Twin - 10 - 14 User
V x x 230 22.8 60
P14
PowerVac® Dry Vacuum
System - Twin - 14 - 20 User
V x x 230 22.8 60
Complies To:
Model
Description
Serial Number
Prefix
Electrical Supply Requirements:
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Warranty Information
LIMITED WARRANTY
SCOPE OF WARRANTY
Midmark Corporation (“Midmark”) warrants to the original purchaser its new PowerVac
®
products and components (except for components not warranted
under “Exclusions”) manufactured by Midmark to be free from defects in material and workmanship under normal use and service. Midmark’s obligation under
this warranty is limited to the repair or replacement, at Midmark’s option, of the parts or the products the defects of which are reported to Midmark within the
applicable warranty period and which, upon examination by Midmark, prove to be defective.
APPLICABLE WARRANTY PERIOD
The applicable warranty period, measured from the date of installation for the original user, shall be five (5) years or 10,000 usage hours (whichever comes
first) for all warranted products and components and ten (10) years or 20,000 usage hours (whichever comes first) for the pump only.
EXCLUSIONS
This warranty does not cover and Midmark shall not be liable for the following: (1) repairs and replacements because of misuse, abuse, negligence,
alteration, accident, freight damage, or tampering; (2) products which are not installed, used, and properly cleaned as required in the Midmark “Installation”
manual and or PowerVac
®
Care Guide for this applicable product; (3) products considered to be of a consumable nature; (4) accessories or parts not
manufactured by Midmark; (5) charges by anyone for adjustments, repairs, replacement parts, installation, or other work performed upon or in connection
with such products which is not expressly authorized in writing in advance by Midmark.
EXCLUSIVE REMEDY
Midmark’s only obligation under this warranty is the repair or replacement of defective parts. Midmark shall not be liable for any direct, special, indirect,
incidental, exemplary, or consequential damages or delay, including, but not limited to, damages for loss of profits or loss of use.
NO AUTHORIZATION
No person or firm is authorized to create for Midmark any other obligation or liability in connection with the products.
THIS WARRANTY IS MIDMARK’S ONLY WARRANTY AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED. MIDMARK MAKES NO IMPLIED
WARRANTIES OF ANY KIND INCLUDING ANY WARRANTIES OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE. THIS WARRANTY IS LIMITED TO
THE REPAIR OR REPLACEMENT OF DEFECTIVE PARTS.
General Information
vi
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© Midmark Corporation 2006 SF-1873
A-1
Troubleshooting
Models:
Serial Numbers:
Section A
Troubleshooting
Function / System Page
Vacuum System ................................... A-2
Electrical System Operation
Power to System......................... A-3
Wall Switch On ........................... A-4
Bottom Float Contact Closes ...... A-5
Middle Float Contact Closes ....... A-6
Top Float Contact Closes ........... A-7
Liquid Evacuation Pump.......................A-11
Rev 2/08
0
1
5
2
0
2
5
-
3
0
5
1
0
AA220500
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© Midmark Corporation 2006 SF-1873
A-2
Troubleshooting
Models:
Serial Numbers:
All
Vacuum System Operation
Operatory waste (air, solids and liquids) is pulled into the separator
through the inlet hose by the rotary claw pump in the vacuum base unit.
Air is separated from liquids and solids. Air then flows into the pump and
out through the exhaust hose.
Fresh air is pumped in through the Vacuum Relief Valve to the pump and
out through the exhaust. (When ports are opened in the operatories the
VRV closes to compensate.)
The check valve connected below the drain port allows the unit to drain
liquids and solids upon removal of vacuum from the chamber when the
pump / motor shuts off.
The fan(s), hour meter and vacuum pump start to run when power is
supplied by the wall switch. The fan(s) and hour meter then begin to cycle
with the vacuum pump / motor. The float switches control the pump motor
by a 24 vac relay via motor contactor.
The upper and lower reed switch floats interact as a latching circuit with
the internal relay to release upon drain below the bottom float.
Vacuum System
Refer To: Page
Low or No Suction ................................ A-9
Air
Liquids
Fr
Fresh Air
Intake
Rev 9/10
Earlier Version Shown
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© Midmark Corporation 2006 SF-1873
A-3
Troubleshooting
Models:
Serial Numbers:
3
4
2
1
Bottom
Float
Middle
Float
Top
Float
Common
AA160800i
Bottom
Float
Middle
Float
Top
Float
Contacts
Open
Contacts
Open
Contacts
Open
Water Level
AA2480i
CONTACTOR
"C"
FAN
Terminal
Block
Fuse F1
Jumper
HOURS
HOUR
METER
BK
RD
WH
WH
WH
BK
BL
WH
WH
YL
BL
RD
BL
RD
BL
BL
4
1
3
2
WH
RD BK
WH
YL
OR
OR
OR
WH
WH
To J1 or J2 Plug on
Evacuation Board
or
to Float on
Separation Tank
BL
BL
RD
RD
BK
BK BK
BK
BK
RD
RD
BK
BK
GN/YL
BK
GN/YL
Circuit
Breaker
BL
Thermal
Reset
BK
RD
BK
BK
RD
Transformer
Transformer
Energized
Circuit Breaker &
Door Limit Switch
Closed
230 VAC
Power On
Fan
Off
Meter
Stopped
Pump
Stopped
BL
RD
BL
BL
BL
CR1 (Float Switch) RELAY
Coil
WH
RD
BL
Contacts Open
Coil
Coil
3
5
1
6
7
8
2
4
4
1
3
2
WH
RD
Power Removed From
Coil, Contacts Open.
Contacts
Open
Contacts
Open
CR1 Coil Not Energized
Contacts Remain in
Same Position
Light
On
Switch
On
WH
BL
RD
Remote
Wall
Switch
On/Off
Light
RD
RD
BL
RD
WH
WH
RD
BL
Electrical System
Refer To: Page
Motor will not Run ................................. A-10
Motor Cutting Out ................................. A-11
Power to System
• Power (230 VAC) is on supplying Line Voltage to the Vacuum Pump Electrical System.
• 230 V is applied to the 230 V / 24 V Transformer energizing it.
• 24 V is applied from one side of Transformer, to the Terminal Block.
• From the Terminal Block, 24 V is applied to Terminal 6 of CR1 Relay, thru CR1 normally
closed contacts (6 & 2) to one side of the coil on Contactor “C”, also to J1 & J2 Plug
(pin 1), and thru the Timer to one side of the Wall On / Off Light.
• 24 V is also applied thru the closed Door Limit Switch,Circuit Breaker & Timer to one
side of the Wall On/Off Switch.
(Power to System Wall Switch Open All Float Switches Open)
SEPARATOR FLOAT
SWITCH ASSEMBLY
Water Low, All Float Switches Open
VACUUM PUMP ELECTRICAL SYSTEM
All
Rev 11/2/15
NOTE:
Some units have dual fans that are wired in parallel.
NOTE:
Manual reset button on earlier versions,
automatic reset on current versions.
Earlier Version HasThree
Reed Switch Floats.
The Middle Float in
Current Version
is Not Used and
No Longer Installed
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© Midmark Corporation 2006 SF-1873
A-4
Troubleshooting
Models:
Serial Numbers:
3
4
2
1
Bottom
Float
Middle
Float
Top
Float
Common
AA160800i
Bottom
Float
Middle
Float
Top
Float
Contacts
Open
Contacts
Open
Contacts
Open
Water Level
AA2478i
CONTACTOR
"C"
FAN
Terminal
Block
Fuse F1
Jumper
HOURS
HOUR
METER
BK
RD
WH
WH
WH
BK
BL
WH
WH
YL
BL
RD
BL
RD
BL
BL
4
1
3
2
WH
RD BK
WH
YL
OR
OR
OR
WH
WH
To J1 or J2 Plug on
Evacuation Board
or
to Float on
Separation Tank
BL
BL
RD
RD
BK
BK BK
BK
BK
RD
RD
BK
BK
GN/YL
BK
GN/YL
Circuit
Breaker
BL
Thermal
Reset
BK
RD
BK
BK
RD
Contacts
Closed
Contacts
Closed
Transformer
Transformer
Energized
Light
On
Switch
On
Circuit Breaker &
Door Limit Switch
Closed
230 VAC
Power On
Fan
On
Meter
Running
Pump
Running
Coil Energized
Contacts Closed
CR1 Coil Not Energized
Contacts Remain in
Same Position
BL
RD
BL
BL
CR1 (Float Switch) RELAY
Coil
WH
RD
BL
Contacts Open
Coil
Coil
3
5
1
6
7
8
2
4
4
1
3
2
WH
RD
WH
RD
BL
WH
BL
RD
Remote
Wall
Switch
On/Off
Light
RD
RD
BL
RD
WH
Wall Switch On
All
Water Low, All Float Switches Open
• Remote Wall Switch is turned on, the On / Off Light comes on.
• 24 V is applied to the other side of the coil of Contactor “C”, energizing the coil and closing its
contacts.
• The Fan(s), Hour Meter, and Vacuum Pump run.
Electrical System - continued (Wall Switch On, Power to System, All Float Switches Open)
SEPARATOR FLOAT
SWITCH ASSEMBLY
VACUUM PUMP ELECTRICAL SYSTEM
NOTE:
Some units have dual fans that are wired in parallel.
NOTE:
Manual reset button on earlier versions,
automatic reset on current versions.
Earlier Version Shown
Earlier Version HasThree
Reed Switch Floats.
The Middle Float in
Current Version
is Not Used and
No Longer Installed
Electrical System- continued (Wall Switch OFF
,
Power to System, All Float Switches Open, Timer ON)
• Remote Wall Switch is turned off, the Timer turns on and starts to measure two hours.
• The Timer will run the Vacuum for one minute every two hours while the Remote Wall Switch is
turned off by completing the 24 V circuit to the Contactor "C" coil.
Rev 11/2/15
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© Midmark Corporation 2006 SF-1873
A-5
Troubleshooting
Models:
Serial Numbers:
AA2478i
CONTACTOR
"C"
FAN
Terminal
Block
Fuse F1
Jumper
HOURS
HOUR
METER
BK
RD
WH
WH
WH
BK
BL
WH
WH
YL
BL
RD
BL
RD
BL
BL
4
1
3
2
WH
RD BK
WH
YL
OR
OR
OR
WH
WH
To J1 or J2 Plug on
Evacuation Board
or
to Float on
Separation Tank
BL
BL
RD
RD
BK
BK BK
BK
BK
RD
RD
BK
BK
GN/YL
BK
GN/YL
Circuit
Breaker
BL
Thermal
Reset
BK
RD
BK
BK
RD
Contacts
Closed
Contacts
Closed
Transformer
Transformer
Energized
Light
On
Switch
On
Circuit Breaker &
Door Limit Switch
Closed
230 VAC
Power On
Fan
On
Meter
Running
Pump
Running
Coil Energized
Contacts Closed
CR1 Coil Not Energized
Contacts Remain in
Same Position
BL
RD
BL
BL
CR1 (Float Switch) RELAY
Coil
WH
RD
BL
Contacts Open
Coil
Coil
3
5
1
6
7
8
2
4
4
1
3
2
WH
RD
WH
RD
BL
WH
BL
RD
Remote
Wall
Switch
On/Off
Light
RD
RD
BL
RD
WH
• Contactor “C” contacts remain closed.
• The Fan(s), Hour Meter, and Vacuum Pump continue to run.
Electrical System - continued (Water Rises, Bottom Float Switch Closes, Middle and Top Switches Remain Open.)
Bottom Float Switch Closed,
Middle and Top Remain Open.
AA160801i
3
4
2
1
Bottom
Float
Middle
Float
Top
Float
Common
Bottom
Float
Middle
Float
Top
Float
Water Level
Contacts
Closed
Contacts
Open
Contacts
Open
VACUUM PUMP ELECTRICAL SYSTEM
All
Bottom Float
Switch Closed
NOTE:
Some units have dual fans that are wired in parallel.
NOTE:
Manual reset button on earlier versions,
automatic reset on current versions.
Earlier Version Shown
Earlier Version HasThree
Reed Switch Floats.
The Middle Float in
Current Version
is Not Used and
No Longer Installed
SEPARATOR FLOAT
SWITCH ASSEMBLY
Rev 11/2/15
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© Midmark Corporation 2006 SF-1873
A-6
Troubleshooting
Models:
Serial Numbers:
AA2478i
CONTACTOR
"C"
FAN
Terminal
Block
Fuse F1
Jumper
HOURS
HOUR
METER
BK
RD
WH
WH
WH
BK
BL
WH
WH
YL
BL
RD
BL
RD
BL
BL
4
1
3
2
WH
RD BK
WH
YL
OR
OR
OR
WH
WH
To J1 or J2 Plug on
Evacuation Board
or
to Float on
Separation Tank
BL
BL
RD
RD
BK
BK BK
BK
BK
RD
RD
BK
BK
GN/YL
BK
GN/YL
Circuit
Breaker
BL
Thermal
Reset
BK
RD
BK
BK
RD
Contacts
Closed
Contacts
Closed
Transformer
Transformer
Energized
Light
On
Switch
On
Circuit Breaker &
Door Limit Switch
Closed
230 VAC
Power On
Fan
On
Meter
Running
Pump
Running
Coil Energized
Contacts Closed
CR1 Coil Not Energized
Contacts Remain in
Same Position
BL
RD
BL
BL
CR1 (Float Switch) RELAY
Coil
WH
RD
BL
Contacts Open
Coil
Coil
3
5
1
6
7
8
2
4
4
1
3
2
WH
RD
WH
RD
BL
WH
BL
RD
Remote
Wall
Switch
On/Off
Light
RD
RD
BL
RD
WH
3
4
2
1
Bottom
Float
Middle
Float
Top
Float
Common
Bottom
Float
Middle
Float
Top
Float
Contacts
Closed
Contacts
Open
Water Level
AA160802i
Contacts
Closed
• Contactor “C” contacts remain closed.
• The Fans, Hour Meter, and Vacuum Pump continue to run.
Electrical System - continued (Water Reaches Middle Float, Middle and Bottom Float Switches are Closed, Top Switch Remains Open.)
Middle Float
Switch Closed
All
SEPARATOR FLOAT
SWITCH ASSEMBLY
VACUUM PUMP ELECTRICAL SYSTEM
Middle and Bottom Float Switches
are Closed, Top Remains Open.
NOTE:
Some units have dual fans that are wired in parallel.
NOTE:
Manual reset button on earlier versions,
automatic reset on current versions.
Earlier Version Shown
Earlier Version HasThree
Reed Switch Floats.
The Middle Float in
Current Version
is Not Used and
No Longer Installed
Rev 11/2/15
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© Midmark Corporation 2006 SF-1873
A-7
Troubleshooting
Models:
Serial Numbers:
AA2479i
CONTACTOR
"C"
FAN
Terminal
Block
Fuse F1
Jumper
HOURS
HOUR
METER
BK
RD
WH
WH
WH
BK
BL
WH
WH
YL
BL
RD
BL
RD
BL
BL
4
1
3
2
WH
RD BK
WH
YL
OR
OR
OR
WH
WH
To J1 or J2 Plug on
Evacuation Board
or
to Float on
Separation Tank
BL
BL
RD
RD
BK
BK BK
BK
BK
RD
RD
BK
BK
GN/YL
BK
GN/YL
Circuit
Breaker
BL
Thermal
Reset
BK
RD
BK
BK
RD
Transformer
Transformer
Energized
Circuit Breaker &
Door Limit Switch
Closed
230 VAC
Power On
Fan
Off
Meter
Stops
Pump
Stops
BL
RD
BL
BL
BL
CR1 (Float Switch) RELAY
Coil
WH
RD
BL
Contacts Open
Coil
Coil
3
5
1
6
7
8
2
4
4
1
3
2
WH
RD
CR1 Coil
Energizes
Contacts Change
Positions
Power Removed From
Coil, Contacts Open.
Contacts
Open
Contacts
Open
Light
On
Switch
On
WH
BL
RD
Remote
Wall
Switch
On/Off
Light
RD
RD
BL
RD
WH
WH
RD
BL
Top Float
Switch Closed
All
3
4
2
1
Bottom
Float
Middle
Float
Top
Float
Common
Bottom
Float
Middle
Float
Top
Float
Contacts
Closed
Water Level
Contacts
Closed
AA160803i
Contacts
Closed
• The Top Float Switch sends 24v to the coil of CR1 Float Switch Relay changing the contacts position.
• Power is removed from the coil of Contactor “C”, opening its contacts.
• The Fan(s), Hour Meter, and Vacuum Pump stop running.
• CR1 Float Switch Relay remains energized through its own normally closed tips (6&4) and the bottom float
swich (pin 3) of J1& J2
• The Collection tank starts to Drain, Pump remains off until Bottom Float Switch opens interupting 24v to the
CR1 Float Switch Relay coil.
• CR1 Float Switch Relay returns to its nornal state energizing Contactor "C", the Vacuum Pump, Fan(s) Motors,
and Hour Meter restart .
Electrical System
- continued (Water Reaches Top Float, All Float Switches are Closed.)
SEPARATOR FLOAT
SWITCH ASSEMBLY
VACUUM PUMP ELECTRICAL SYSTEM
All Float Switches are Closed.
NOTE:
Manual reset button on earlier versions,
automatic reset on current versions.
Earlier Version Shown
Earlier Version HasThree
Reed Switch Floats.
The Middle Float in
Current Version
is Not Used and
No Longer Installed
NOTE:
Some units have dual fans that are wired in parallel.
Rev 11/2/15
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© Midmark Corporation 2006 SF-1873
A-8
Troubleshooting
Models:
Serial Numbers:
Low or No Suction
All
Vacuum System
Problem: Operatory has low or no suction.
Check Vacuum Relief Valve.
Refer to: Section B - Vacuum Relief Valve.
5th
Check Drain Line for Suction.
Refer to: Section B - Check Valve.
4th
Check Hoses and Bulkhead Fittings.
Check for leaks, kinks and loose connections in the
hoses, bulkhead fittings and separator lid gasket.
3rd
Will the motor start?
If motor runs go to 2nd check.
If not Refer to Section A - Motor will not run.
1st
Check Exhaust.
Remove exhaust line to see if suction increases.
Unclog or replace exhaust line if suction increased when checking.
Refer to: Section B - Exhaust
6th
Refer To: Page
Motor will not Run ................................. A-10
Belt ............................................... B-2
Check Valve ......................................... B-6
Vacuum Relief Valve ............................ B-9
Exhaust ............................................... B-12
Pump pulley will not spin freely ........... A-9
Earlier Version Shown
Rev 5/17/19
Earlier Version Shown
Check Belt Tension.
Refer to: Section B - Belt.
(Earlier Version ONLY)
2nd
Check that Pump Pulley Spins Freely.
If pump pulley does not spin freely Refer to
Section A - Pump Pulley Not Spinning Freely
7th
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© Midmark Corporation 2006 SF-1873
A-9
Troubleshooting
Models:
Serial Numbers:
All
Pump Pulley Not
Spinning Freely
Vacuum System
Problem: Pump pulley not spinning freely.
Earlier Version
Current Version
Refer To: Page
Pump Testing and Repair ..................... B-51
Incorrect vacuum line cleaners.
Non-foaming line cleaners and proper line
cleaning procedures are required.
Draining ultrasonic cleaning solutions with the
vacuum is not recommended.
Refer to: B - Pump Testing and Repair.
Timer working properly?
The timer should run the vacuum for approximately
one minute every two hours and should be installed on
all P series vacuums.
P series vacuums should be turned on/off through the
low voltage circuit. Using the main AC power supply to
turn the vacuum on/off does not allow the timer to
work properly.
Timmer dip switches (S2) should be down/off position.
Refer to: B - Pump Testing and Repair.
Moisture in the pump?
Moisture from the exhaust can get into the pump
and cause it not to spin freely.
Verify the exhaust P-trap is installed properly and
the drain tube is not clogged.
Refer to: B - Pump Testing and Repair.
1st
Rev 5/17/19
2nd
3rd
© Midmark Corporation 2006 SF-1873
A-10
Troubleshooting
Models:
Serial Numbers:
Vacuum System
Problem: Motor will not run.
Check Contactor.
Refer to: Section B - Contactor
8th
Check Fuse.
Refer to: Section B - Fuse
5th
Reset Thermal Overload.
Refer to: Section B - Motor
2nd
Check Relay.
Refer to: Section B - Relay
7th
Check Door Limit Switch.
Refer to: Section B - Door Limit Switch
3rd
Check Low Voltage.
Refer to: Section B - Low Voltage
4th
Check Motor.
Refer to: Section B - Motor
9th
Check Float.
Refer to: Section B - Float
6th
Refer To: Page
Door Limit Switch................................B-20
Float...................................................B-15
Pump .................................................B-49
Low Voltage .......................................... B-18
Motor ..................................................B-42
Contactor .............................................. B-25
Fuse .................................................. B-27
Relay ................................................ B-30
All
Motor Not Running
Rev 9/10/18
Is Pump locked up?
Refer to: Section B - Pump
1st
Earlier Version Shown
Earlier Version Shown
A-11
This page is intentionally blank
Rev 3/26/19
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© Midmark Corporation 2006 SF-1873
A-12
Troubleshooting
Models:
Serial Numbers:
RER
Check Equipment Room Temperature.
Temperature should be - 40° to 104° Fahrenheit
- 4 to 37 Celsius
1st
Check Contactor Voltage.
Refer to: Section B - Contactor
2nd
Is Pump locked up?
Refer to: Section B - Pump
3rd
Check Exhaust line and valve.
Refer to: Section B - Exhaust
4th
Check Motor.
Refer to: Section B - Motor
5th
Motor Cutting Out
All
Refer To: Page
Contactor .............................................. B-25
Pump ....................................................B-44
Exhaust ............................................... B-12
Motor ..................................................B-42
Vacuum System
Problem: Motor cutting out or running at a reduced speed.
Earlier Version Shown
Rev 9/10/18
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© Midmark Corporation 2006 SF-1873
A-13
Troubleshooting
Models:
Serial Numbers:
Liquid Evacuation Pump Electrical System shown when the Bottom & Middle Float Switches are Closed and Pump is running.
(Liquid Evac Pump is Optional)
AA158503i
HIGH
VOLTAGE
LOW
VOLTAGE
K4
C1
115
VAC
115
VAC
J4
F3 FUSE
F2 FUSE
F1 FUSE
115 VAC
Supply
Neutral
(Blue)
Line
(Black)
J7
J6
BK
GN
RD
WH
POWER
ON
LIGHT
BL
WH
WH
WH
BK
BL
YL
BK
BK
BR
GN/YL
WH
BK
BL
YL
GN/YL
Grd
J5
PLUG
4
1
2
3
4
3
2
1
K1
RELAY
VACUUM PUMP #1
Top
Float Swt.
Bottom
Float Swt.
RELAY
Contacts
Open
LED
OFF
RELAY
K2
K3
RELAY
Neutral
(Wht)
Line
(Blk)
EVAC.
PUMP
J8
J9
1
4
2
3
Middle
Float Swt.
Common
Top
Float Swt.
Bottom
Float Swt.
To
Separator
Float Assy.
1
4
2
3
BK
GN
RD
WH
Com.
Bottom
Middle
Top
WH
BK
RD
WH
BK
RD
J2
PLUG
2
3
1
1
4
2
3
BK
RD
WH
To Motor Control
(CR1 Relay)
System #2
(Same As
Above J1)
1
4
2
3
Coil (7)
N/O (4)
1
4
2
3
BK
RD
WH
To Motor Control
(CR1 Relay)
System #1
N/O
Com. (6)
WH
RD
BK
J3
Plug
1
2
J1
PLUG
2
3
1
Light
On
115 VAC
Power On
Transformer
Energized
24 VAC
On
115 VAC
Power On
Contacts
Closed
VACUUM PUMP #2
Contacts
Closed
FLOATS
Contacts
Closed
EVAC. PUMP
LED
ON
Evac.
Pump
Swt.
LED
ON
115 VAC
Power On
LIQUID
EVACUATION
PUMP
Pump
On
115 VAC
Power On
NOTE:
The Liquid Evacuation Pump will continue to run until the water
level drops below the
Bottom
float switch, opening K3 & K4 relay
contacts.
If the
Top
float closes, K1 relay contacts close, and its LED is on,
a problem is occurring with the system.
Check for a restriction in the lines, pump not functioning, or PC
board problem.
All
Liquid Evac Pump
Electrical
The Liquid Evacuation Pump is an optional accessory for the PowerVac
®
.
• 115 VAC is applied to the 115V / 24V Transformer energizing it.
• 24 VAC is applied from one side of the Transformer to the J3 plug.
• When the water level reaches the
Bottom
float switch, K3 relay contact closes.
• When the water level reaches the
Middle
float switch, K2 & K4 relay contact close.
Power is supplied to J8 and J9 terminals, energizing the Liquid Evacuation Pump.
Electrical System for Accessory - Liquid Evacuation Pump
Refer To: Page
Evacuation Pump Will Not Run............. A-12
Pump Runs But Will Not Pump ............. A-13
Pump tripping Thermal Overload .......... A-14
Rev 9/10/18
Optional Liquid Evac Pump Must use a Three Float Assembly
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© Midmark Corporation 2006 SF-1873
A-14
Troubleshooting
Models:
Serial Numbers:
Evacuation Pump System
Problem: Evacuation Pump will not run.
Check Low Voltage
to PC Board
Refer to: Section B - Liquid
Evacuation Pump
2nd
Check Supply Voltage
to PC Board
Refer to: Section B - Liquid
Evacuation Pump
1st
Check Float Assembly
Refer to: Section B - Float
Assembly
3rd
Check Thermal Motor
Protector
Refer to: Section B - Liquid
Evacuation Pump
4th
Check PC Board
Refer to: Section B - Liquid
Evacuation Pump
5th
Check Pump Motor
Refer to: Section B - Liquid
Evacuation Pump
6th
All
Evacuation Pump
Will Not Run
Refer To: Page
Liquid Evacuation Pump
Check Supply Voltage ...............B-53-B-56
Check Low Voltage....................B-53-B56
Check Float Assembly....................... B-15
Check Thermal Motor Protector...B-53-B-56
Check PC Board........................B-53-B-56
Check Pump Motor....................B-53-B-56
Earlier Version Shown
Earlier Version Shown
Rev 9/10/18
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