Trouble Shooting Guide
TheguidebelowisintendedtoaidanInstallerorServiceTechnicianinresolvingsimpleproblems.
CAUTION: To prevent electrical shock and/or damage to the equipment, disconnect electrical power to the system at the main fuse or
circuit breaker before opening the appliance control box, and leave disconnected until after the lid has been shut and secured.
CAUTION: Any testing performed on live conductors must be carried out by qualied personnel only.
Observation Possible Cause Remedial Action
Coolerdoesnot
work/NoLCD
displayonthe
WallControl
Incorrectconnectionofwiring
betweenWallControlandAppliance
ControlBoard
CheckthecorrectconnectionofthethreewiresattheApplianceControlBoard
andWallControl.Ensurethecorrectwiringorderatbothends,andthatthe
terminalsarecorrectlyttedandsecured
PowerSupplyCircuitBreakerOffor
ApplianceControlBoxnotconnected
tothePowerSupply.
ChecktheconditionofPowerSupplyCircuitBreaker.Verifythatthecircuit
BreakerSwitchisOn.
SupplyVoltageshouldbepresentbetweenSupplyL1andSupplyNterminals
ontheApplianceControlBoard.
BlownFuseintheApplianceControl
Box.
ChecktheconditionofFuselocatedontheApplianceControlBoard.Check
forincorrectwiring.Replaceblownfusewiththecorrecttype.
ApplianceControlBoardorWall
Controlfaulty.
SwitchonthePowersupplytotheApplianceControlBox.
MeasuretheDCVoltageattheWallControlbetweentheBlackandRedtermi-
nalswiththeWallControlstillconnected.Ifthemeasuredvoltageisgreater
than3.0VDCandtheLCDremainsblank,theWallControlisatfault.
Ifthevoltageislessthan3.0VDC,disconnecttheredwireandmeasurethe
voltagebetweentheblackandredwire.Ifthemeasuredvoltagerisesto
3.0VDC,theWallControlisfaulty.Ifthemeasuredvoltageremainslow,the
ApplianceControlBoardisatfault.
Water/Purge
Pumpdoesnot
work.LCDon
WallControl
indicatesitis
on.(*)
PoorconnectionofWaterPumptermi-
nalsontheApplianceControlBoard.
VerifythatWaterPumpleadsarecorrectlyconnectedtotheWaterPumpcon-
nectionscrewterminalsontheApplianceControlBoard.
Incorrectconnectionofwiring
betweenWallControlandAppliance
ControlBoard.
VerifythatcolorsofthermostatcablematchthecolordescriptiononAppliance
ControlBoard.Checkthatallwiresarermandsecure.
FanMotor
doesnotwork
/NoFanHigh
and/orFanLow
operation(*)
Pre-Wetcycleisactive CheckLCDdisplayforashingPre-Wetindicatingthefanisturnedoffuntil
pre-wetcycleiscomplete.
PoorconnectiontoFanMotortermi-
nalsontheApplianceControlBoard.
VerifythatFanMotorleadsarecorrectlyconnectedtotheFanHi,FanLo,and
NconnectionscrewterminalsontheApplianceControlBoard.
Incorrectconnectionofwiring
betweenWallControlandAppliance
ControlBoard.
VerifythatcolorsofthermostatcablematchthecolordescriptiononAppliance
ControlBoard.Checkthatallwiresarermandsecure.
PoorconnectionbetweenLinkand
Nlink
Verifythatthejumperwireacross“Link”and“Nlink”isconnectedproperly.
Warning: Use the jumper wire only when fan and pump voltages are
the same.
*Appliance
ControlBoard
DiagnosticTest
TheControlBoardcontainsdiagnosticbuttonsintheupperleftrecessedsection.Followtheinstructionsofthelabello-
catedontheinsideboxcovertodiagnosethedifferentfunctionsoftheboard.Pressingthebuttonswilltesteachfunction
oftheboard.IfallLED’slightduringthetest,thecontrolboardisworkingproperly.Ifnotthecontrolboardisfaulty.