Goodman CONDENSING UNITAIR CONDITIONING - Page 21

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TROUBLESHOOTING INFORMATION: UNITARY DIAGNOSTIC CODES
Diagnostic/Status LED Codes
ComfortNet™
Thermostat Only
Symptoms of Abnormal
Operation (Legacy &
ComfortNet™ Thermostat)
Green Yellow Red Red Y1
Fault
Description
Message Code
Possible Causes
Corrective Actions Notes & Cautions
x Compressor and outdoor fan are
off.
x Low pressure and high pressure
switches are closed.
x Integrated control module
diagnostic/status LED’s display the indicated code.
x ComfortNet™ thermostat “Call for
Service” icon illuminated.
x ComfortNet™ thermostat scrolls
“Check Air Conditioner” or “Check Heat Pump” message.
OFF 7 Flashes OFF ON if call
present;
OFF if no
call
x Open Run
Circuit
OPEN RUN 07
x Compressor run
winding is open.
x Compressor not
properly wired to control.
x Faulty compressor
wiring.
x Check compressor;
repair/replace as needed.
x Check wiring;
repair/replace as needed.
x Turn power OFF
prior to repair.
x Fault will clear after
1 normal cycle.
x Fault may be
cleared by cycling 24VAC to control.
x Replace with correct
replacement part(s).
x Compressor and outdoor fan are
off.
x Low pressure and high pressure
switches are closed.
x Open run circuit has been
detected 4 times with 5 minute delay between each detection.
x Integrated control module
diagnostic/status LED’s display the indicated code.
x ComfortNet™ thermostat “Call for
Service” icon illuminated.
x ComfortNet™ thermostat scrolls
“Check Air Conditioner” or “Check Heat Pump” message.
OFF 7 Flashes ON ON if call
present;
OFF if no
call
x Open Run
Circuit Lockout
OPEN RUN
LOCK
07
x Compressor run
winding is open.
x Compressor not
properly wired to control.
x Faulty compressor
wiring.
x Check compressor;
repair/replace as needed.
x Check wiring;
repair/replace as needed.
x Turn power OFF
prior to repair.
x Must clear fault by
cycling 24VAC to control.
x Replace with correct
replacement part(s).
x Air conditioner/heat pump may
appear to be operating normally.
x Compressor protector may be
open (compressor and outdoor fan off).
x Integrated control module
diagnostic/status LED’s display the indicated code.
OFF 8 Flashes OFF ON if call
present;
OFF if no
call
x Low Line
Voltage
LOW LINE
VOLT
08
x Low line voltage. x Check circuit
breakers and fuses.
x Verify unit is
connected to power supply as specified on rating plate.
x Correct low line
voltage condition; contact local utility if needed.
x Turn power OFF
prior to repair.
x Control detects line
voltage less than 185 VAC.
x Fault will clear if line
voltage increases above 185 VAC.
x Air conditioner/heat pump may
appear to be operating normally.
x Compressor protector may be
open (compressor and outdoor fan off).
x Integrated control module
diagnostic/status LED’s display the indicated code.
ON 8 Flashes OFF ON if call
present;
OFF if no
call
x High Line
Voltage
HIGH LINE
VOLT
08
x High line voltage. x Correct high line
voltage condition; contact local utility if needed.
x Verify unit is
connected to power supply as specified on rating plate.
x Correct low line
voltage condition; contact local utility if needed.
x Turn power OFF
prior to repair.
x Control detects line
voltage greater than 255 VAC.
x Fault will clear if line
voltage decreases below 255 VAC.