40
Table12 – LED Sta tus Codes
StatusLED StatusLED Descr iption StatusLED TroubleshootingInformation
Green“POW ER” Module has power Supplyvoltage ispresent at module terminals
Red“TRIP”
LEDOn Solid
Thermostat demand signal
Yis present, but the com-
pressoris not running.
1. Compressorprotector is open
2. Condensingunit power disconnect is open
3. Compressorcircuitbreakerorfuse(s)isopen
4. Brokensup ply wires or connector is not making contact
5. Compressorpower wires not routed through C omfortAlert
6. Compressor contactor has failed open
Red“TRIP” L ED
Flashing
Theanti-short cycle timer (3minutes) in module is preventing compressorrestart.
Modulelocks out compressorwhen compressor damagingALERT code appears.
LockoutALERT codes are noted in the Status LED Description.
Duringa compressor lock out,24VAC power must be removed from moduleto manually reset.
Yellow“ALERT”
LEDOn Solid
Ashort circuit or over cur-
rentcondition exists on
PROTterminal.
1. Compressor contactor coil shorted
2. Electricalload too high for PROT circuit (maximum 1 Amp)
3. 24V AC wir ed directly to PROT terminal
Yellow“ALERT”
FlashCod e 2
SystemP ressure Trip
Dischargepressure out of
limitsor compressor ov er-
load(if no high pressure
switchin sy stem)
LOCKOUT
1. High head pressure
2. Condenser coil poor air circulation (dirty, blocked, damaged)
3. Condenserfan is not running
4. Iflow pressure switch isopen: Refer to C ode 3 for troubleshooting
Yellow“ALERT”
FlashCod e 3
ShortC ycling
Compressoris running only
briefly(four consecutive
cyclesof lessthan three
minuteseach)
LOCKOUT
1. Iflow p ressure switch is open:
a. Lowrefrigerant charge
b. Evaporatorblower is notrunning
c. Evaporator coil is frozen
d. Faultymetering d evice
e. Condenser coilis d irty
f. L iquid line restriction (filter drier blocked if prese nt)
2. Ifhig h pressure switch is open, go to Flash Code 2 information
3. Intermittent thermostat demand signal
4. Systemor contr ol board defective
Yellow“ALERT”
FlashCod e 4
LockedRotor
LOCKOUT
1. Lowline v oltage to compressor
2. Excessive liquid refrigerant in compressor
3. Compressorbearings are seized
Yellow“ALERT”
FlashCod e 5
OpenCircuit 1. Condensingunit power disconnect is open
2. Compressorcircuitbreakerorfusesareopen
3. Compressor contactor has failed open
4. Highpressure switch is open and requires manual reset
5. Brokensup ply wires or connector is not making contact
6. Unusuallylong compressor protectorreset time due to extreme
ambienttemperature
7. Compressorwindings are damaged
Yellow“ALERT”
FlashCod e 6
MissingP hase
LOCKOUT
1. Compressorfuseisopenononephase
2. Brokenwire or con nector on one phase
3. Compressor motor winding is damaged
4. Utilitysupply has droppedone phase
Yellow“ALERT”
FlashCod e 7
ReversePhase
LOCKOUT
1. Compressorrunning backward due to supply phase reversal
Yellow“ALERT”
FlashCod e 8
Welded Contactor
Compressor always runs
1. Compressor contactor has failed closed
2. Thermostatdemand signal not connected tomodule
Yellow“ALERT”
FlashCod e 9
LowVoltage
Control circuit < 18VAC
1. Control circuit transformer is overloaded
2. Lowline v oltage to compressor
569J