Service Manual -
HRG18xxS1P
508206-01
Issue 2140
Page 38 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
436
62
6
flashes
2
flashes
Service
Soon/
Service
Urgent
OD Inverter
High Heat-Sink
Temperature
Inverter heat sink temperature exceeded limit.
• This occurs when the heat sink temperature exceeds the inverter limit.
Inverter will issue inverter alert code 13 first and slow down to try to cool
the heat sink.
• If temperature remains high, outdoor unit will stop both compressor and
fan – moderate condition.
• Anti- short cycle is initiated.
• If condition occurs five times within an hour, system will lockout – critical
condition.
• The screws that hold the inverter to the inverter board were loose causing
poor contact between these two components.
• Tighten screws that hold the heat sink to the inverter control board.
NOTE:
Wait five minutes for all capacitors to discharge before checking
screws.
• Inverter LEDs will flash code 62.
• Refer to the unit service documentation for detailed troubleshooting
procedures.
Inverter flash code 62.
The sequence is:
•
Red LED: Six Flashes
•
Green LED: Two Flashes
NOTE:
Inverter normal operations with no error code present is as
follows. Red LED is ON and Green LED is OFF.
Moderate condition
will automatically
clear when the
inverter sends an
alert code clear
message.
Critical condition
is cleared by
disconnecting power
to the outdoor unit
and restart.
437
65
6
flashes
5
flashes
Service
Soon/
Service
Urgent
OD Inverter Heat-
Sink temp Sensor
Fault
Heat sink temperature sensor fault has occurred (temperature less than
4ºF or greater than 264ºF after 10 minutes of operation).
• When the temperature sensor detects a temperature less than 4ºF or
greater than 264ºF after 10 minutes of operation.
• Outdoor unit will stop both compressor and fan – moderate condition.
• Anti-short cycle is initiated.
• If condition occurs five times within an hour, system will lockout – critical
condition.
• Inverter LEDs will flash code 65.
• Refer to the unit service documentation for detailed troubleshooting
procedures.
Inverter flash code 65.
The sequence is:
•
Red LED: Six Flashes
•
Green LED: Five 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 will
automatically clear
when the inverter
sends an alert code
clear message.
Critical priority
condition can
be cleared by
disconnecting and
reconnecting power
to outdoor unit to
restart.
Table 12. Alert Codes and Troubleshooting