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28 | Troubleshooting
Status LED
YELLOW "ALERT"
Open Circuit
FLASH CODE 5
YELLOW "ALERT"
Open Start Circuit
FLASH CODE 6
Current only in run
circuit
YELLOW "ALERT"
Open Run Circuit
FLASH CODE 7
Current only in start
circuit
YELLOW "ALERT"
Welded Contactor
FLASH CODE 8
Compressor always
runs
YELLOW "ALERT"
Low Voltage
FLASH CODE 9
Control circuit <
17VAC
8 733 905 315 (2013/9)
Comfort Alert Module -Flash Codes
Status LED
Description
1. Outdoor unit power disconnect is open
2. Compressor circuit breaker or fuse(s) is open
3. Compressor contactor has failed open
•
•
•
•
4. High pressure switch is open and requires manual reset
5. Open circuit in compressor supply wiring or
connections
6. Unusually long compressor protector reset time due to
extreme ambient temperature
7. Compressor windings are damaged
•
1. Run capacitor has failed (may not be bad, verify)
2. Open circuit in compressor start wiring or connections
•
3. Compressor start winding is damaged
•
1. Open circuit in compressor run wiring or connections
•
2. Compressor run winding is damaged
•
1. Compressor contactor has failed closed
2. Thermostat demand signal not connected to module
1. Control circuit transformer is overloaded
2. Low line voltage (contact utility if voltage at disconnect
is low)
•
Subject to change without prior notice
Status LED Troubleshooting Information Solution
Check compressor contactor wiring and connectors
Check for compressor contactor failure (burned,
pitted or open)
Check wiring and connectors between supply and
compressor
Check for low pilot voltage at compressor contactor
coil
Check compressor motor winding resistance
Check wiring and connectors between supply and
the compressor "S'" terminal
Check compressor motor winding resistance
Check wiring and connectors between supply and
the compressor "R" terminal
Check compressor motor winding resistance
Check wiring connections Flash Code number
corresponds to a number of LED flashes, followed
by a pause and then repeated. TRIP and ALERT LEDs
flashing at same time means control circuit voltage
is too low for operation
LM Series Heat Pump
LM Series Heat Pump
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