Page 32
31-5000751 Rev. 0
GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), ZA=Zone system and TS=Thermostat
Alert
Code
Inverter
Code
Inverter Flash
Code
Priority
Condition
Actual Displayed
Alert Text
Component or System Operational State
and Troubleshooting Tip
How to Clear
Alert Code
Red
LED
Green
LED
181
Service
Soon
OD Suction
Pressure
Transducer Fault
•
Suction Pressure Transducer reading above 4.75V or below 0.25V for
24hrs +/- 3hrs. Run on staged operation.
Resets after 3
consecutive readings
that are in range.
182
Service
Soon
OD Suction
Temperature
Sensor Fault
•
Reading below 0.25V or above 4.75V for 24hrs +/- 3hrs. System will
continue to operate normally.
Resets after 3
consecutive readings
that are in range.
183
Service
Soon
OD Liquid
Pressure Sensor
Fault
•
Under 0.25V and above 4.75V readings for 24 hours +/-3hrs or more on
the sensor will cause this error.
•
Continue normal operation, see sections related to low pressure switch
emulation for specific details related to low pressure switch faults.
Resets after 3
consecutive readings
that are in range.
345
Service
Urgent
Relay O Failure
The
O
relay on the system component has failed. Either the pilot relay
contacts did not close or the relay coil did not energize.
•
Possible
O
relay / stage 1 failure.
•
Pilot relay contacts did not close or the relay coil did not energize.
•
Replace system component (device) control.
If error is applicable to any GE Appliances variable capacity outdoor unit,
the outdoor control will need to be replaced.
Automatically
clears after the fault
recovered following
reset.
409
Service
Soon
OD Control Board
Low 24VAC
The secondary voltage for the applicable system component has fallen
below 18VAC. This may be due to:
•
Secondary voltage is below 18VAC.
•
If this continues for 10 minutes, the thermostat will turn off the applicable
system component.
Automatically clears
after voltage is
detected as higher
than 20VAC for two
seconds or after
power reset.
410
Information
Only-Dealer
OD Open Low
Pressure Switch
Unit low pressure is below the required limit.
•
Check operating pressures.
•
Low pressure switch opens at a specific pressure (system shuts down)
and closes at a specific pressure (system restarts).
Automatically clears
when the system
detects that the
issue no longer
exists.
411
Service
Urgent
OD Low Pressure
Switch Strikes
Lockout
The low pressure switch has opened five times during one cooling or
heating demand.
•
Thermostat will shut down the outdoor unit.
•
Open low pressure switch error count reached five strikes.
•
Check system charge using both approach and sub-cooling methods.
•
Reset by putting outdoor unit control in test mode or resetting low voltage
power.
Automatically clears
when the system
detects that the
issue no longer
exists.
412
Information
Only-Dealer
OD Open High
Pressure Switch
The unit high pressure is above the upper limit.
•
System will shut down.
•
Confirm that the system is properly charged with refrigerant.
•
Check condenser fan motor, expansion valve (if installed), indoor unit
blower motor, stuck reversing valve or clogged refrigerant filter.
•
Confirm that the outdoor unit is clean.
Automatically
clears after the high
pressure switch
closes or a power
reset.
413
Service
Urgent
OD High Pressure
Switch Strikes
Lockout
The high pressure switch has opened five times during one cooling
demand.
•
Thermostat will shut down the outdoor unit.
•
Open high pressure switch error count reached five strikes.
•
Check system charge using superheat and sub-cooling temperatures.
•
Check outdoor fan operation.
•
Check for dirt or debris blocking air flow to outdoor unit.
•
Reset by putting outdoor unit control in test mode or resetting low voltage
power.
Automatically clears
when the system
detects that the
issue no longer
exists.
Table 12. Alert Codes and Troubleshooting