Service Manual -
HRG18xxS1P
508206-01
Issue 2140
Page 79 of 83
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
438
73
7
flashes
3
flashes
Service
Urgent
OD Inverter PFC
Input Over-current
The inverter has detected a power factor correction (PFC) circuit
over-current condition.
• The inverter has detected an PFC over current condition. This may
be caused by a high load condition, high pressure, or outdoor fan
failure.
• Outdoor control will display the code when the inverter has detected
the error – moderate condition.
• After three minutes, the inverter will reset and the compressor will
resume operation.
• If the error condition occurs 10 times within a 60 minute rolling time
period, the outdoor unit control will lock out operation of the outdoor
unit – critical condition.
• Possible issue is system running at high pressures.
• Check for high pressure trips or other alert codes in thermostat and
outdoor control.
• Inverter LEDs will flash code 73.
• Refer to the unit service documentation for detailed troubleshooting
procedures.
Inverter flash code 73.
The sequence is:
•
Red LED: Seven Flashes
•
Green LED: Three Flashes
NOTE:
Inverter normal operations with no error code present is as
follows. Red LED is ON and Green LED is OFF.
Moderate priority
condition is
automatically cleared
when the inverter
sends a clear
message.
Critical priority
condition will
automatically clear
when inverter is
power cycled.
Table 24. Outdoor Control 7-Segment Display Alert Codes and Inverter LED Flash Codes