Manual

10
Green"POWER"
Red"TRIP"
Yellow"ALERT"
FlashCode1
Yellow"ALERT"
FlashCode2
Yellow"ALERT"
FlashCode3
Yellow"ALERT"
FlashCode5
Yellow"ALERT"
FlashCode6
Yellow"ALERT"
FlashCode7
YeIIow"ALERT" WeldedContoctor
FlashCede8 Compressoralwaysruns
Yellow"ALERT" LewVoltage
FlashCede9 Controlcircuit<17VAC
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Modulehaspower
Thermostatdemandsignal
Yispresent,butthe 2.
compressorisnot 3.
running 4.
5.
6.
LongRnnTime 1.
Compressoris 2.
runningextremely 3.
longruncycles 4.
5.
6.
7.
8.
9.
SystemPressureTrip 1.
Dischargeorsuction 2.
pressureoutoflimitsor 3.
compressoroverloaded 4.
5.
ShortCycling
Compressorisrunning
onlybriefly
LockedRotor
OpenCircuit
4.
5.
6.
7.
OpenStartCircuit 1.
Currentonlyinruncircuit 2.
3.
OpenRanCircuit 1.
Currentonlyinstartcircuit
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Supplyvoltageis presentatmoduleterminals
1. Compressorprotectorisopen
Outdoorunitpowerdisconnectisopen
Compressorcircuitbreakerorfuse(s)isopen
Brokenwireorconnectorisnotmakingcontact
Lowpressureswitchopenifpresentinsystem
Compressorcontactorhasfailedopen
Lowrefrigerantcharge
Evaporatorblowerisnotrunning
Evaporatorcoilisfrozen
Faultymeteringdevice
Condensercoilisdirty
Liquidlinerestriction(filterdrierblockedifpresentinsystem)
Thermostatismalfunctioning
ComfortAlertFailure
ComfortAlertFailure
Highheadpressure
Condensercoil poorair circulation(dirty, blocked,damaged)
Condenserfanisnotrunning
Returnairducthassubstantialleakage
Iflowpressureswitchpresentinsystem,checkFlash
Code1information
1.Thermostatdemandsignalisintermittent
2.Timedelayrelayorcontrolboarddefective
3. IfhighpressureswitchpresentgotoFlashCode2information
4. IflowpressureswitchpresentgotoFlashCode1information
1. Runcapacitorhasfailed
2. Lowlinevoltage(contactutilityifvoltageatdisconnectislow)
,, Checkwiringconnections
3. Excessiveliquidrefrigerantincompressor
4. Compressorbearingsareseized
,, Measurecompressoroillevel
1. Outdoorunitpowerdisconnectisopen
2. Compressorcircuitbreakerorfuse(s)isopen
3.Compressorcontactorhasfailedopen
* Checkcompressorcontactorwiringandconnectors
o Checkforcompressorcontactorfailure(burned,pittedor
open)
,, Checkwiringandconnectorsbetweensupplyand
compressor
,, Checkforlowpilotvoltageatcompressorcontactorcoil
Highpressureswitchis openandrequiresmanualreset
Opencircuitincompressorsupplywiringorconnections
Unusuallylongcompressorprotectorresettimedueto
extremeambienttemperature
Compressorwindingsaredamaged
,, Checkcompressormotorwindingresistance
Runcapacitorhasfailed
Opencircuitincompressorstartwiringorconnections
o Checkwiringandconnectorsbetweensupplyandthe
compressor"S"terminal
Compressorstartwindingisdamaged
* Checkcompressormotorwindingresistance
Opencircuitincompressorrunwiringorconnections
,, Checkwiringandconnectorsbetweensupplyandthe
compressor"R'terminal
2. Compressorrunwindingisdamaged
,, Checkcompressormotorwindingresistance
1. Compressorcontactorhasfailedclosed
2. Thermostatdemandsignalnotconnectedto module
1. Controlcircuittransformerisoverloaded
2. Lowlinevoltage(contactutilityifvoltageatdisconnectis low)
,, Checkwiringconnections
Flash Code number corresponds to a number of LED flashes followed by a pause and then repeated
TRIP and ALERTLFDe flashing at same time means control circuit vollage is too low for operation
Table 1. interpreting the Diagnostic LEDS