GSX14 Service Manual

SERVICING
87
Diagnostic/Status LED Codes
Com f o r tNet™
Thermostat Only
Symptoms of Abnormal Operation
(Legacy & ComfortNet™ Thermostat)
Green Yell ow Red Red Y1
Fault
Description
Mess a ge Code
Possi ble Causes
Corrective Actions Not es & Cauti ons
• Air co nditi oner/ heat pump may appear
to be operating normally.
• Integrated control module
diagnostic/status LED’s display the indicated code.
OFF 9
Fl ash e s
OFF ON if call
present;
OFF i f no
call
• Low Pilot
Voltage
LOW
SECOND
VOLT
09 • Control detects secondary
voltage less than 18 VAC.
• Transformer overloaded. • Low line vol tage.
• Check fuse. • Correct low secondary
voltage condition.
• Check transformer;
replace if needed.
• Turn power OFF prior
to repair.
• Fault will clear if
secondary voltage rises above 21VAC.
• Replace with correct
replacement part(s).
• Compressor is off.
• Integrated control module
diagnostic/status LED’s display the indicated code.
OFF ON ON ON if call
present;
OFF i f no
call
• Comp Protector
Open
Not di sp layed
Not
displ aye d
• No current through run or
start wi ndings.
• Compressor run wi ndi ng
is ope n.
• Compressor not properl y
wired to control.
• Faulty compressor wiring. • Failed compressor run
capacitor.
• Faulty run capacitor
wir i n g.
• Check compressor;
repair/replace as needed.
• Check wiring;
repair/replace as needed.
• Check run capacitor;
replace as needed.
• Turn power OFF prior
to repair.
• Fault will clear after 1
no r mal cycle.
• Fault may be cleared by
cycling 24VAC to control.
• Replace with correct
replacement part(s).