Midmark PowerVac G Parts Manual

Category
Vacuum cleaner supplies
Type
Parts Manual
FOR USE BY MIDMARK TRAINED TECHNICIANS ONLY
Model Numbers:
Service and
Parts Manual
PowerVac
®
G
G3
G5
G7
004-0790-00 Rev. AA7 (1/20/20)
Single Vac Units
G6
G10
G14
Twin Vac Units
© 2018 Midmark Corp. | 60 Vista Drive Versailles, OH 45380 USA | 1-800-643-6275 | 1-937-526-3662 |
BackBack
NextNext
Go to Table of ContentsGo to Table of Contents
midmark.com
ii[Revised: 11/27/17]
Table of ContentsTable of Contents
GENERAL INFORMATION
Symbols .................................................................iii
Ordering Parts & SN location .............................iii
Specications ....................................................... iv
Model Identication & Compliance Chart .......... v
Warranty ............................................................... vi
TROUBLESHOOTING
Vacuum System Operation ............................. A-2
Electrical System Operation ........................... A-3
Troubleshooting Chart ..................................... A-4
VFD Error Codes ......................................... A-6
TESTING & ADJUSTMENTS
Door Limit Switch & On/O Switch ................ B-2
Float ................................................................... B-5
Check Valve ...................................................... B-8
Motor & Pump ................................................. B-10
Master Control Panel ..................................... B-15
VFD (Variable Frequency Drive) .................. B-18
Line Filter ......................................................... B-20
Fuse & Transformer ....................................... B-22
PC Board ......................................................... B-25
Contactor ......................................................... B-28
Pressure Sensor ............................................. B-30
Fan ................................................................... B-32
Gauge .............................................................. B-34
Separator Tank ............................................... B-35
Vacuum Adjustment ................................... B-36
VRV ........................................................... B-37
General InfoSection A
Section E
Section B
Section CSection D
(*) Indicates multiple pages due to model / serial number break(s).
ACCESS PROCEDURES
Front Cover ....................................................... C-2
Top Plate ............................................................ C-3
Electrical Cover ................................................. C-4
Back Cover ........................................................ C-5
VFD Covers ......................................................... C-6
WIRING DIAGRAMS
PowerVac G (Electrical Box) ......................... D-2
VFD (Variable Frequency Drive) .................... D-5
Motor Connections ...................................... D-6
PC Board ........................................................... D-7
EXPLODED VIEWS
Single Models ................................................... E-2
Twin Models ...................................................... E-3
NextNext
BackBack
Go to Table of ContentsGo to Table of Contents
iii[Revised: 1/20/20]
General InformationGeneral Information
WARNING
Indicates a potentially hazardous situation which
could result in serious injury if not avoided.
Equipment Alert
Indicates a potentially hazardous situation which
could result in equipment damage 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
Symbols
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 is not working at all, or that the
component is faulty.
Ordering Parts
The following information is required when ordering parts:
• Serialnumber&modelnumber
• Partnumberfordesiredpart
(Refer to Section E: Exploded Views & Parts Lists)
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 to 5:00 p.m. EST (Monday thru Friday)
Phone:1-800-Midmark(1-800-643-6275)
Serial Number Location
Note
Used for special instructions or additional information.
Tank Serial
Number Label
Base Serial
Number Label
NextNext
BackBack
Go to Table of ContentsGo to Table of Contents
iv[Revised: mo/dd/yr]
Model Max
Users
Base Unit
HxWxD
Separator
HxWxD
Actual Weight
(LBS.)
Total
HP
Voltage Amps Hertz Recommended
Breaker Size
(Amps)
Inlet
Connection
Size (IN.)
Fuses Drain
Connection
Size (IN.)
G3 3-5 25 x 22 x 20
Each
34 x 22 x 22
Each
Base Unit - 375
Separator - 49
3 230 20 60 30 1 1/2” 1/8 A, 250V
Type T
1 1/2”
G5 5-7 25 x 22 x 20
Each
34 x 22 x 22
Each
Base Unit - 375
Separator - 49
3 230 20 60 30 1 1/2” 1/8 A, 250V
Type T
1 1/2”
G7 7-10 25 x 22 x 20
Each
34 x 22 x 22
Each
Base Unit - 375
Separator - 49
3 230 20 60 30 1 1/2” 1/8 A, 250V
Type T
1 1/2”
G6 6 25 x 22 x 20
Each
34 x 22 x 22
Each
Base Unit - 375
Separator - 49
6 230 40 60 2 x 30 2” 1/8 A, 250V
Type T
1 1/2”
G10 10 25 x 22 x 20
Each
34 x 22 x 22
Each
Base Unit - 375
Separator - 49
6 230 40 60 2 x 30 2” 1/8 A, 250V
Type T
1 1/2”
G14 14 25 x 22 x 20
Each
34 x 22 x 22
Each
Base Unit - 375
Separator - 49
6 230 40 60 2 x 30 2” 1/8 A, 250V
Type T
1 1/2”
PowerVac
®
G Speci cations
Classi cations: Class 1, Type B Applied Part
Specications
NextNext
BackBack
Go to Table of ContentsGo to Table of Contents
v[Revised: mo/dd/yr]
Model Identication / Compliance Chart - PowerVac
®
G
Model Description
Complies To: Electrical Ratings:
UL
60601-1
CAN / CSA
22.2,
#601.1-M90
EN
60601-1-2
(EMC)
VAC
+/- 10%
Amps Cycles (Hz)
G3 PowerVac
®
G Dry Vacuum System - Single - 3 to 5 User
230 20 60
G5 PowerVac
®
G Dry Vacuum System - Single - 5 to 7 User
230 20 60
G7 PowerVac
®
G Dry Vacuum System - Single - 7 to 10 User
230 20 60
G6 PowerVac
®
G Dry Vacuum System - Twin - 6 to 10 User
230 40 60
G10 PowerVac
®
G Dry Vacuum System - Twin - 10 to 14 User
230 40 60
G14 PowerVac
®
G Dry Vacuum System - Twin - 14 to 20 User
230 40 60
NextNext
BackBack
Go to Table of ContentsGo to Table of Contents
vi[Revised: mo/dd/yr]
Warranty
MidmarkCorporation(“Midmark”)warrantstotheoriginalpurchaseritsnewPowerVac
®
G products and components (except for components not warranted under “Exclusions”) manufac-
tured 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(5)yearsor10,000usagehours(whichevercomesrst)forallwarrantedproductsand
components.Ten(10)yearsor20,000usagehours(whichevercomesrst)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
®
G 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 conse-
quentialdamagesordelay,including,butnotlimitedto,damagesforlossofprotsorlossofuse.
No Authorization
Nopersonorrm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 NOT IMPLIED WARRANTIES OF ANY KIND
INCLUDING ANY WARRANTIES OF MECHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE. THIS WARRANTY IS LIMITED TO THE REPAIR OR REPLACEMENT OF DEFECTIVE
PARTS.
NextNext
BackBack
Go to Table of ContentsGo to Table of Contents
A-1[Revised: mo/dd/yr]
Section ASection A
Operation &
Troubleshooting
Vacuum System Operation .................A2
Electrical System Operation ..............A3
Troubleshooting ..................................A4
VFD Covers .......................................C-6
NextNext
BackBack
Go to Table of ContentsGo to Table of Contents
A-2 Always verify model & serial number
Models:
Serial Numbers:
[Revised: 9/20/11]
All
all
Vacuum System Operation
Air, water, and solids from the operatory are
pulled into the separator. Air is expelled out
through the pump exhaust while water and
solids fall to the bottom of the tank. The
vacuum in the separator keeps the check
valve to the drain closed and the tank
graduallylls.
Therisinguidleveleventuallyclosesthetop
oatswitch,whichturnsthepumpo.Since
vacuum is no longer being maintained, the
check valve opens allowing water and solids
to drain from the separator. The upper and
lowerreedswitchoatsinteractasalatching
circuit with the internal relay to release upon
drainbelowthebottomoat.
Note:Ifthepowerisshuto,theunitwilldrain
automatically due to a loss of vacuum
regardless of the water level in the tank.
When the tank drains enough to open the
bottomoatswitch,thepumpstartsrunning
again. This restores vacuum and closes the
checkvalve.Note:ifthepoweristurnedo,
tank will drain completely.
When no instruments (suction tips) are being
used(HVEsshutofor5secondsormore)
the system goes into sleep mode to save
energy. Sleep mode pressure is set to 6”Hg.
Vacuum pressure will ramp down from its
normal operating pressure to sleep mode
pressure when the unit goes to sleep. The
sleep mode pressure is maintained at 6”Hg
until the variable frequency drive (VFD)
senses an increase in vacuum pressure is
required when an instrument (suction tip) has
been opened. The VFD will then speed up
the motor to increase vacuum pressure to the
normal operating pressure.
AA2267
Pump Operating
(Sleep Mode)
Check Valve
(Closed)
Check Valve
(Closed)
Check Valve
(Open)
From
Operatory
Pump Operating
Exhaust
Exhaust
Drain
Drain
Drain
Pump
Stopped
Water and Solids
Air (Atmospheric
Pressure)
Vacuum
Note
Earlier production units
had three reed switch
floats. The middle float
was not used and is
not installed in current
production units.
Electrical Operation...............A3
Troubleshooting.....................A4
NextNext
BackBack
Go to Table of ContentsGo to Table of Contents
A-3[Revised: 11/2/15]
Electrical System Operation
When Main input power supply (230V) is on, it is
supplying line voltage to the vacuum pump electrical
system.
The Main input power supply (230V) is supplied to
the contactor, thermostat, fans, transformer, variable
frequencydrive(VFD),andthelinelter.Whenthe
On/Oswitchormastercontrolswitchareintheiro
state or the front panel is removed from the unit, the
contactor will remain open and the input power will be
connected to the input side of the contactor, thermo-
stat, fans, and the transformer only.
When the contactor is energized, it closes and con-
nectsthemaininputpowersupplytothelinelter.
Main input power supply is then applied to the VFD
through RL1 and SR2 (single phase).
Thetransformer’soutputsends24voltsACtothePC
board. 24 volts AC power is used to control the door
limitswitch,hourmeter,andoats.Theelectronicson
thePCboardconvert24VACto24VDCforthepres-
sure sensor though the means of a connector.
When instruments (suction tips) are in use, the vacu-
um pump is running and claws are turning to build up
vacuum pressure. The pressure sensor is constantly
measuring the amount of vacuum pressure. When
the pressure level drops below the vacuum set point
(12”Hg – factory setting), the pressure measure-
ment initiates the VFD to speed up the motor. When
pressure is above set point the VFD slows the motor
down.
Whenthevacuumisshutofromtheremoteswitch
the timer starts and will turn on the vacuum for one
minute every two hours. (Standard on new units,
older units can be upgraded)
Vacuum Operation.................A2
Troubleshooting.....................A4
Note
On twin units a parallel cable (4-pin Master / 6-pin Slave) connects the two base units on the side of the electrical box. The plumbing is connected using a tee assembly.
The parallel connection is controlled between variable frequency drives in a twin configuration. Twin units run the same as a single unit. Keypad, hour meter and fans are
located on the outside of the base unit. Pressure sensor and float are located on the separator tank.
AA2486i
VFD
Box
Parallel
Connection
Fans
Themostat
230 VAC
Line Voltage
Line Filter
Contactor
Pressure
Sensor
Transformer
YL
YL
3
2
1
ON
CTS
Note
Timer Bd. Std. after SN: V1648735 units prior to this can be updated
NextNext
BackBack
Go to Table of ContentsGo to Table of Contents
A-4
Troubleshooting Chart
Problem Display/Symptom Cause Check Action
Motor not running
Or Breaker keeps
tripping.
NOTE:
When working on
twin unit unplug
parallel harness
NA
No power. Checkon/oswitchonfrontofthebase. Verifyon/oswitchisintheonpostion.
Check disconnect box/ circuit breaker (Main). Verify disconnect box/circuit breaker (Main) is in the on
postion.
Low Voltage Harness
disconnected/loose.
Checkdoorlimitswitch,on/oswitchand
master control panel harness.
Secure/Replace harness connections.
Faulty Switch
Check LED light “D4”, if “ON” only check “Low Volt-
age”. If LED light is not on, preform checks on Door
Limitswitch,On/Oswitch,andmastercontrolpanel.
Refer to: Section B PCBoard” to check LED light,
“Door Limit Switch”, “On/OSwitch”and “Master
ControlPanel”.
Replace Switch
Separator tank not drain-
ing.
"PossibleClogintank.Removelidtoseeiftankis
full.
Remove clog.
Check valve is stuck closed. Refer to section B check
valve.
Repair/ Replace check valve
Turnpoweroandunplugoatharnessfrombase
unit. Turn unit back on, if the unit runs check Section
B: Float
Replace Float Assembly
Wire harness between
VFDandPCboardloose
or broken.
Check for loose or broken wire harness between
VFDandPCboard.
EnsuregreycableispluggedintoVFDandPC
board.
Secure/Replace harness connections.
Pumpislockedup.
Feel for pump pulley drag or sticking. Refer to sec-
tion B pump.
Contact Midmark Technical Service.
1-800-643-6275
PCboard
Malfunctioning.
Turnmainpowersupplyon.(Keepunitturnedo.)
UnplugwireharnessfromJ6onPCboard.
Testresistance.SetmetertoΏ.MeterReading>1
ΏRefertoSectionBPCBoard
ReplaceMainPCBoard
Check Daughter Card. Refer to Section B Daughter
Card
ReplaceMainPCBoard
Contactor not working
properly.
Check Contactor. Refer to: Section B Contactor Replace Contactor.
[Revised: 2/25/19]
NextNext
BackBack
Go to Table of ContentsGo to Table of Contents
NextNext
BackBack
Go to Table of ContentsGo to Table of Contents
A-5
Troubleshooting Chart
Problem Display/Symptom Cause Check Action
Motor not running
Or Breaker keeps
tripping.
-Continued-
NOTE:
When working on
twin unit unplug
parallel harness
VFD not working properly. Check if there is an error code displayed. Refer to:
Section A VFD Error Code Chart
Follow required actions in testing.
LightsnotworkingonPCboardcheckFuse.
Refer to: Section B Fuse and Transformer.
Replace Fuse
Lights not working on VFD, check Line Filter. Refer
to: Section B Line Filter
Secure/Replace harness connections.
Lights not working on VFD, check Contactor. Refer
to: Section B Contactor
Replace Contactor
LightsnotworkingonPCboardchecktransformer
Refer to: Section B Fuse and Transformer.
Replace Transformer
Lights not working on VFD. Check Ohms at J6
terminal. Greater than 5 ohm. Refer to Section
BPCBoard(main power on, unit power on, J 6
Unplugged)
ReplacePCBoard
Lights not working on VFD. Disconnect drive harness
at J6 Location to check for 24V DC. If Voltage is not
present Ohm out drive harness. Refer to section B
VFD Variable Frequency Test.
Replace Drive Harness
Lights not working on VFD. Check for line Voltage
(208-230V) at incoming terminal strip on VFD. If
Line voltage is present. Refer to section D Variable
Frequency Drive
Replace VFD
Motor bad.
Preformallmotorchecks.Referto:Section B Motor
&Pump
Replace Motor
Operatory has low
or no suction.
NA
Motor not running. See“Problem”,motornotrunningor
breaker keeps tripping
See “Action” , motor not running or
breaker keeps tripping.
Leaking or loose
connection.
Checkhosesandbulkheadttings. Secure/Replace hoses or bulkhead connections.
Check Separator lid gasket. Replace Separator Lid Gasket
Check drain line check valve. Refer to: Section B
Check Valve
Replace Check Valve.
Pumppulleynotspinning
freely.
Moisture in the pump. Ptrapnotinstalledproperly. Drain,releasepump,installmissing“P”trapper
instructions.
Ptrapdrainsystemclogged. Drain,releasepump,removeclogfrom“P”trapdrain.
Incorrect line cleaners. Customer should be using non sudsing line cleaners. Release pump, refer customer to user’s manual.
Incorrect line cleaning
process.
How customer is cleaning lines. Release pump, refer customer to user’s manual.
Suds from ultrasonic cleaner
getting into pump.
Suctionlineclosetoultrasonic,Inquirewithsta. Release pump, advise customer not to use product to
drain ultrasonic cleaner.
[Revised: 2/25/19]
NextNext
BackBack
Go to Table of ContentsGo to Table of Contents
NextNext
BackBack
Go to Table of ContentsGo to Table of Contents
A-6
Troubleshooting Chart
Problem Display/Symptom Cause Check Action
Operatory has low
or no suction.
-Continued-
Pumppulleynotspinning
freely.
-Continued-
Timer Kit not installed properly. Installation of kit. Release pump, correct or install timer kit.
Timer kit faulty Check dip switch location on timer board dip switches
are to be in down position or timer is malfunctioning
Release pump, repair replace timer kit.
No power to timer kit. Ifpowerisbeingturnedotovacuumsystem.Vacuum
system must be powered for timer to function correctly.
Release pump, continual power needed for timer
kit.
NA
Exhaust Hose Clogged Remove exhaust hose to see if suction increases. if
suction increased check for clog.
Unclog or replace
exhaust line
Pressuresensornot
working properly.
Check pressure sensor. Referto:SectionBPressure
Sensor
Replace pressure sensor.
Motor cutting out
or running at a
reduced speed.
N/A
Ambient temperature too high. Check Equipment Room Temperature should be 40° to
104 ° degrees Fahrenheit or
4 - 37 Celsius.
Refer to installation manual site requirements
Contactor not working properly.
Check Contactor. Refer to: Section B Contactor Replace Contactor
Pumpislockedup.
Referto:SectionBPump Contact Midmark Technical Service. 1-800-643-
6275
Exhaust Hose Clogged Remove exhaust hose to see if suction increases. if
suction increased check for clog.
Unclog or replace exhaust line
Motor not running. See“Problem”,motornotrunningor
breaker keeps tripping.
See “Action” , motor not running or
breaker keeps tripping.
Motor running at
top speed all the
time.
NA
Pressuresensornot
working properly.
Check pressure sensor. Referto:SectionBPressure
Sensor
ReplacePressuresensor
Plumbinglinesleaking. Checkoceplumbingsystemforleaks. Repair/ReplacePlumbingLines
VRV Malfunctioning Check VRV. Refer to: Section B VRV Adjust/Replace VRV
Oil Leak
Leaking Oil
OilReservoirisoverlled. Check site glass.RefertosectionBPump Drain Oil
Pumpisoverheating Check ambient temperature in the room. Temperature
should be 40° to 104° F or 4° to 40° C
Contactacertiedspecialisttoadjusttempera-
ture.
Check Clearance around unit. Allow 12inch on the front
and right side and allow 6 inches on the left side and
back
Adjustbaseunittoclearancespecications.
Check if fans are working. Refer to section B Fans Replace fans
Minor Oil leak Minimal oil leakage may occur with no harm to the vacu-
um.Refertotheoilsiteglasslllevelrequirements.
Monitoroillevelsandllasneeded.
Replace absorbent pad if required.
[Revised: 2/25/19]
NextNext
BackBack
Go to Table of ContentsGo to Table of Contents
NextNext
BackBack
Go to Table of ContentsGo to Table of Contents
A-7
VFD (Variable Frequency Drive)
Error Codes
Problem Display/Symptom Cause Check Action
VFD Error Code
oL1 Motor Overload Pumpislockedup. Referto:SectionBPump Contact Midmark Technical Service.
1-800-643-6275
oL2 Drive Overload Pumpislockedup.
Referto:SectionBPump Contact Midmark Technical Service.
1-800-643-6275
oL3 Over torque
Detection 1
Pumpislockedup.
Referto:SectionBPump Contact Midmark Technical Service.
1-800-643-6275
oL4 Over torque
Detection 2
Pumpislockedup.
Referto:SectionBPump Contact Midmark Technical Service.
1-800-643-6275
FbHExcessivePressure
(Feedback Sensor)
Pressuresensorfailure.
Referto:SectionBPressureSensor Replace pressure sensor.
FbL Feedback Loss
(Feedback Sensor)
PlumbingSystemisnot
Complete
Check unit/units are hooked up in the operatory
j-box.
Secure Connections at J-Box
Check HVE, saliva ejector tips are closed Close Tips
Check clean outs are closed Close Clean Outs
Checkhosesandbulkheadttings. Secure/Replace hoses or bulkhead
connections.
Check Separator lid gasket. Replace Separator Lid Gasket
Check drain line check valve. Refer to: Section B
Check Valve
Replace Check Valve.
Harness not properly con-
nected to base unit or
pressure sensor on tank.
Referto:SectionBPressureSensor Replace pressure sensor.
There is a broken wire in
one of the harnesses.
CheckPCBoardPressureSensorHarnessat
J13.
Repair/ReplacePCboardpressureharness.
The 24V power supply on
thecontrolPCBdaughter
card has failed.
Check Daughter Card. Refer to Section B
Daughter Card
ReplaceMainPCBoard
Pressuresensorfailure.
Referto:SectionBPressureSensor Replace pressure sensor.
GF (Ground Fault) One of the wires in the
motor harness is creating a
short circuit.
Refer to Section D: Motor Connections Replace motor harness
The motor insulation is
damaged.
Refer to Section D: Motor Connections Replace Motor
[Revised: 11/2/16]
NextNext
BackBack
Go to Table of ContentsGo to Table of Contents
NextNext
BackBack
Go to Table of ContentsGo to Table of Contents
A-8
VFD (Variable Frequency Drive)
Error Codes
Problem Display/Symptom Cause Check Action
VFD Error Code
-Continued-
LF OutputPhaseLoss VFD has loose connec-
tions.
Checkred(V/T2),blue(W/T3)&black(U/T1)wire
connections on the VFD and the motor. Refer to
Section D VFD
Secure/Replace motor harness
Damaged Motor
Refer to Section D: Motor Connections Replace Motor
Bad drive transistor Contact Midmark Technical Service Replace VFD
LF2 Output Current
Imbalance
VFD has loose
connections.
Checkred(V/T2),blue(W/T3)&black(U/T1)wire
connections on the VFD and the motor. Refer to
Section D VFD
Secure/Replace motor harness
Damaged Motor
Refer to Section D: Motor Connections Replace Motor
Bad drive transistor Contact Midmark Technical Service.
1-800-643-6275
Replace VFD
oC Overcurrent One of the wires in the
motor harness is creating a
short circuit.
Refer to Section D: Motor Connections Replace motor harness
The motor overheated
repeatedly causing
insulation to be damaged
Refer to Section D: Motor Connections Replace motor
Pumplockedup
RefertoSectionB:Pump Contact Midmark Technical Service.
1-800-643-6275
Uu1 or Uu Undervoltage The power has been
momentarily interrupted.
Checkifunitwaspoweredo. Turn unit back on.
Incoming voltage is low. Check incoming voltage. (208-230) Contactacertiedelectrician.
Faulty Switch
CheckOn/Oswitch.Referto:SectionBOn/O
Switch
ReplaceON/Oswitch.
Check Door Limit switch. Refer to: Section B
Door Limit Switch
Replace Door Limit Switch
Check Master control panel. Refer to: Section B:
MasterControlPanel
ReplaceMasterControlPanel
Output connections from
the contactor are loose.
Check wire connections on contactor. Secure Connections.
Input power connections to
the VFD are loose
Check wire connections on VFD Secure Connections.
The internal VFD circuitry
has worn out.
Refer to section B VFD Variable Frequency Test. Replace VFD
[Revised: 11/2/16]
NextNext
BackBack
Go to Table of ContentsGo to Table of Contents
NextNext
BackBack
Go to Table of ContentsGo to Table of Contents
A-9
VFD (Variable Frequency Drive)
Error Codes
Problem Display/Symptom Cause Check Action
VFD Error Code
-Continued-
ou Overvoltage Incoming voltage high Check incoming voltage. Contactacertiedelectrician.
Powersurge.
Check incoming voltage. Refer to Section B
Contactor
Cycle power to unit.
Ground fault in the VFD
circuit causing the
capacitors to overcharge.
Performcontinuitycheckon
motor harness for shorts. Refer to section D: Mo-
tor Connections
Replace Motor Harness
Performcontinuitycheck
on the motor windings for shorts. Refer to section
D: Motor Connections
Replace Motor
oH or oH1 Heatsink
Overheat
Ambient temperature is too
high.
Check room temperature. Refer to Installation
Manual-Specications
Allow room to cool or add ventilation fan to
room.
Pumplockedup
RefertosectionBPump Contact Midmark Technical Service.
1-800-643-6275
VFD Cooling Fan has
malfunction.
Check VFD Fan. Replace VFD.
SC Communication Error Front display board not
communicating.
Remove Ethernet cable from back of front display.
Re power. If no error code on main drive
controller.
Replace front display board.
Main drive controller not
communicating
Remove Ethernet cable from back of front display.
Re power. If error code remains on main drive
controller.
Replace VFD
[Revised: 11/2/16]
NextNext
BackBack
Go to Table of ContentsGo to Table of Contents
NextNext
BackBack
Go to Table of ContentsGo to Table of Contents
B-1[Revised: mo/dd/yr]
Section BSection B
Testing &
Adjustments
Door Limit Switch & On/O Switch ...................... B-2
Float .................................................................... B-5
Check Valve ........................................................ B-8
Motor & Pump .....................................................B10
Master Control Panel ........................................ B-15
Low Voltage ....................................................... B-17
VFD (Variable Frequency Drive) ....................... B-19
Line Filter .......................................................... B-20
Fuse & Transformer ........................................... B-22
PC Board ........................................................... B-25
Contactor ........................................................... B-28
Pressure Sensor ............................................... B-30
Fan .................................................................... B-32
Gauge ............................................................... B-34
Separator Tank .................................................. B-35
Vacuum Adjustment .......................................... B-36
VRV .................................................................. B-37
NextNext
BackBack
Go to Table of ContentsGo to Table of Contents
B-2 Always verify model & serial number
Models:
Serial Numbers:
[Revised: mo/dd/yr]
Door Limit Switch & On/O Switch
(Circuit Breaker)
Location & Function
With facility power (230 VAC) supplied to the system...
The transformer continuously supplies 24 VAC to the normally-open
door limit switch.
With the front access cover in place...
The plastic bumper on the top right side of the access cover, trips
the door limit switch causing it to close.
Whenthelimitswitchisclosed,24VACowsthrutheswitchtothe
PowerVacGcircuitbreaker(On/O)switch.Withthecircuitbreaker
switch ON, current is supplied to the remote wall switch (if appli-
cable).
When the front access cover is removed...
ThedoorlimitswitchopensandstopscurrentowtothePowerVac
circuit breaker. This is a safety feature that prevents the system from
operating with the cover removed.
All
all
Door Limit Switch
Note
If the facility does not have a remote wall switch, the PowerVac
G circuit breaker serves as the On/Off switch for the system.
On/O Switch
(Circuit Breaker )
Door Limit Switch Test .......................B-3
On/O Switch Test ............................. B-4
NextNext
BackBack
Go to Table of ContentsGo to Table of Contents
B-3 Always verify model & serial number
Models:
Serial Numbers:
[Revised: 2/17/11]
All
all
With switch “untripped”...
Meter Reading Required Action
OL Limit switch - OK
less than 5 ohms Replace limit switch
With switch “tripped”...
Meter Reading Required Action
OL Replace limit switch
less than 5 ohms Limit switch - OK
Door Limit Switch
Test
Door Limit Switch Function ................ B-2
On./O Switch Testing .......................B-4
Front Cover Access ...........................C-2
Caution
When testing components with power on
use care to prevent electrical shock.
Caution
Door Limit Switch is a safety device.
If switch is not working, do not bypass. warranty will be
void if switch is bypassed. If both tests fail, it must be replaced.
Caution
During this step, the motor belt and
pulley may spin with front cover off. Stay clear
and keep everything out of the vacuum base!
Step 3: Turn power on and depress
activation button with a
screwdriver.
Note: If motor starts up, quickly take pressure off
switch. Plastic bumper may be obstructed or
damaged. Check plastic bumper on door for
damage. If damaged, switch it with plastic
bumper on opposite side of door until a
replacement can be ordered. If motor doesn’t
start, continue to step 4.
Step 4: Turn power off.
Step 5: Remove mounting screw for door limit switch.
Disconnect electrical leads.
Step 6: Testcontinuity.SetmetertoΏ.
PlacemeterprobesonCOMandNOterminals.
Note: Check switch “tripped” and “untripped”.
Step 7: Install front cover.
COM
NC
NO
AA2290
Activation Button
Mounting Screw
Step 1: Turn power off at on/off switch and
main power supply box.
Remove electrical cover.
Turn power on at on/off switch and
main power supply box.
Check to see if D4 LED light is on.
If light is on, door limit switch is ok.
If light is off, continue with step 2.
Note: Refer to Section C Electrical Cover
Step 2: Turn power off.
Remove front cover.
Note: Refer to Section C: Front Cover.
Note
When working on Twin units,
unplug parallel harness.
NextNext
BackBack
Go to Table of ContentsGo to Table of Contents
B-4 Always verify model & serial number
Models:
Serial Numbers:
[Revised: 2/17/11]
AA165501i
On/O Switch (Circuit Breaker)
Test
All
all
Step 2: Remove front cover.
Note: Refer to Section C: Front Cover.
Step 3: Testcontinuity.SetmetertoΏ.
Disconnect leads from switch terminals.
PlacemeterprobesonCOMandNOterminals.
Note: Check switch “tripped” and “untripped”.
Caution
When testing components with power on
use care to prevent electrical shock.
Door Limit Switch Function ................ B-2
Door Limit Switch Testing ..................B-3
Front Cover Access ...........................C-2
Step 4: Connect switch leads and install front cover.
With switch “untripped”...
Meter Reading Required Action
OL Switch - OK
less than 5 ohms Replace Switch
With switch “tripped”...
Meter Reading Required Action
OL Replace Switch
less than 5 ohms Switch - OK
Step 1: Turn power off at on/off switch and
main power supply box.
Remove electrical cover.
Turn power on.
Check to see if D4 LED light is on.
If light is on, on/off switch is ok.
If light is off, continue with step 2.
Note: Refer to Section C Electrical Cover
Note
When working on Twin units,
unplug parallel harness.
NextNext
BackBack
Go to Table of ContentsGo to Table of Contents
B-5 Always verify model & serial number
Models:
Serial Numbers:
[Revised: 11/2/16]
All
all
Float Assembly
Location & Function
Onearlierproductionunitstheoatassembly
containedthreeoat(reed)switchesmountedon
abracketatdierentintervals.Currentunitsonly
havetwooatswitches.
The reed switch has contacts that remain open
until the liquid in the separator rises, causing the
oattoriseuntilthemagnetcontactsthereed
switch.
When the magnet contacts the reed switch, the
open contacts inside the reed closes.
Whenthetopoatswitchcloses,thevacuum
pumpstoprunninguntilthebottomoatopens
and the cycle starts again.
Theupperandloweroatsinteractasalatching
circuit with the internal relay to release upon drain
belowthebottomoat.Themagnetintheoatis
to activate the reed switch within the stem.
Check Float .......................................B-6
Reed Switch
Contacts are
Open Until
Magnet Closes
Float
Magnet
Float
Note
Earlier production units
had three reed switch
floats. The middle float
was not used and is
not installed in current
production units.
Check
Result
Required
Action
Float connection
removed from
base
Pump starts
running
Troubleshoot
oats
Pump still
not running
Troubleshoot
Pump
To check if float switches are preventing pump from running...
A) Turn power off at on/off switch.
B) Remove float wire connection from rear of base by un-threading connector and removing.
C) Turn power back on at on/off switch.
D) If pump runs the tank is either full (not draining) or there is a issue with the floats proceed
to next page.
E) If the pump doesn’t run proceed with troubleshooting the pump base.
Equipment Alert
Running pump with float wire connection removed from base other than to briefly troubleshoot
can cause damage to the pump.
Float Wire
Connection
NextNext
BackBack
Go to Table of ContentsGo to Table of Contents
  • Page 1 1
  • Page 2 2
  • Page 3 3
  • Page 4 4
  • Page 5 5
  • Page 6 6
  • Page 7 7
  • Page 8 8
  • Page 9 9
  • Page 10 10
  • Page 11 11
  • Page 12 12
  • Page 13 13
  • Page 14 14
  • Page 15 15
  • Page 16 16
  • Page 17 17
  • Page 18 18
  • Page 19 19
  • Page 20 20
  • Page 21 21
  • Page 22 22
  • Page 23 23
  • Page 24 24
  • Page 25 25
  • Page 26 26
  • Page 27 27
  • Page 28 28
  • Page 29 29
  • Page 30 30
  • Page 31 31
  • Page 32 32
  • Page 33 33
  • Page 34 34
  • Page 35 35
  • Page 36 36
  • Page 37 37
  • Page 38 38
  • Page 39 39
  • Page 40 40
  • Page 41 41
  • Page 42 42
  • Page 43 43
  • Page 44 44
  • Page 45 45
  • Page 46 46
  • Page 47 47
  • Page 48 48
  • Page 49 49
  • Page 50 50
  • Page 51 51
  • Page 52 52
  • Page 53 53
  • Page 54 54
  • Page 55 55
  • Page 56 56
  • Page 57 57
  • Page 58 58
  • Page 59 59
  • Page 60 60
  • Page 61 61
  • Page 62 62
  • Page 63 63
  • Page 64 64
  • Page 65 65
  • Page 66 66
  • Page 67 67
  • Page 68 68
  • Page 69 69
  • Page 70 70
  • Page 71 71
  • Page 72 72
  • Page 73 73
  • Page 74 74
  • Page 75 75
  • Page 76 76
  • Page 77 77
  • Page 78 78
  • Page 79 79
  • Page 80 80
  • Page 81 81
  • Page 82 82
  • Page 83 83
  • Page 84 84
  • Page 85 85
  • Page 86 86
  • Page 87 87
  • Page 88 88
  • Page 89 89
  • Page 90 90

Midmark PowerVac G Parts Manual

Category
Vacuum cleaner supplies
Type
Parts Manual

Ask a question and I''ll find the answer in the document

Finding information in a document is now easier with AI