SERVICING
65
Symptoms of
Abnormal Operati
on
Diagnostic/Status LED Codes
Fault Descrip
-
tion
Possible Causes
Corr
ective
Actions
Notes & Cautions
Green
Yellow
Red
Red Y1
•
Very long run time.
•
Four consecutive compressor protector trips with average run time between trips greater than 3 hours.
•
Compressor operating at high speed and outdoor fan operating at low speed
•
Integrated control module diagnostic/status LED’
s display the indicated code.
OFF
1 Flash
OFF
ON if call present;
OFF if no call
•
Low Side Fault.
•
Low refrigerant char
ge.
•
Restriction in liquid line.
•
Indoor blower motor failure.
•
Indoor thermostat set extremely low
.
•
Verify refrigerant char
ge; adjust as
needed.
•
Check for restricted liquid line; repair/replace as needed.
•
Check indoor blower motor; repair/ replace as needed.
•
Check indoor thermostat setting.
•
Turn power OFF prior to repair
.
•
Fault will clear after 30 consecutive normal cycles.
•
Fault may be cleared by cycling 24V
AC to control.
•
Replace with correct replacement part(s).
•
Compressor and outdoor fan are off.
•
Thermostat demand is present.
•
Integrated control module diagnostic/status LED’
s display the indicated code.
ON
1 Flash
OFF
ON if call present;
OFF if no call
•
Low Pressure CO T
rip.
•
Low refrigerant char
ge.
•
Restriction in liquid line.
•
Indoor blower motor failure.
•
Indoor thermostat set extremely low
.
•
Verify refrigerant char
ge; adjust as
needed.
•
Check for restricted liquid line; repair/replace as needed.
•
Check indoor blower motor; repair/ replace as needed.
•
Check low pressure switch; repair/ replace as needed.
•
Check indoor thermostat setting.
•
Turn power OFF prior to repair
.
•
Replace with correct replacement part(s).
•
Compressor and outdoor fan are off.
•
Low pressure switch trip 3 times
within same
thermostat demand.
•
Thermostat demand is present.
•
Integrated control module diagnostic/status LED’
s display the indicated code.
ON
1 Flash
ON
ON if call present;
OFF if no call
•
LPCO Lockout (3 T
rips).
•
Low refrigerant char
ge.
•
Restriction in liquid line.
•
Indoor blower motor failure.
•
Indoor thermostat set extremely low
.
•
Verify refrigerant char
ge; adjust as
needed.
•
Check for restricted liquid line; repair/replace as needed.
•
Check indoor blower motor; repair/ replace as needed.
•
Check low pressure switch; repair/ replace as needed.
•
Check indoor thermostat setting.
•
Turn power OFF prior to repair
.
•
Must clear fault by cycling 24V
AC
to control.
•
Replace with correct replacement part(s).
PCBHR101-103
PBBGR101-102
Summary of Contents for ASXC16
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