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SM Series Heat Pump
Status LED
YELLOW "ALERT"
Short Cycling
FLASH CODE 3
Compressor is running
only briefly
YELLOW "ALERT"
Locked Rotor
FLASH CODE 4
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 Control
FLASH CODE 9
circuit < 17VAC
Revised 07-17
Comfort Alert Module -Flash Codes
Status LED
Description
1.
Thermostat demand signal is intermittent
2.
Time delay relay or control board defective
3.
If high pressure switch present go to Flash Code 2 information
4.
If low pressure switch present go to Flash Code 1 information
1.
Run capacitor has failed (may not be bad, verify)
2.
Low line voltage (contact utility if voltage at disconnect is low)
•
3.
Excessive liquid refrigerant in compressor
4.
Compressor bearings are seized
•
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)
•
Status LED Troubleshooting Information Solution
Check wiring connections
Measure compressor oil level
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
Troubleshooting | 39
8733942411 (2017/06)
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