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Service Manual -
HRG18xxS1P
508206-01
Issue 2140
Page 36 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
433
29
2
flashes
9
flashes
Service
Soon/
Service
Urgent
OD Inverter
Compressor
Over-current
Compressor phase current is too high.
• During initial startup, a six minute time delay is implement to prevent
the alarm from occurring.
• Error occurs when compressor peak phase current is greater than
28 amps.
• Inverter will issue inverter code 14 first and slow down to try to
reduce the current.
• If the current remains high, outdoor unit will stop (compressor and fan)
– moderate condition.
• Cycle timer is initiated.
• If condition occurs five times within 60 consecutive minutes, the
system will lockout – critical condition.
•
•
This alert code may be triggered by the inverter or the
Comfort-Aire or
Century
variable capacity outdoor (inverter controlled) unit.
Comfort-Aire or Century outdoor control may trigger an this alert
code if the inverter reduces the compressor speed which is identified
as a alert code 441 and the compressor speed (in hz) is below the
minimum speed. This will typically occur at start-up. The inverter
automatically increases the compressor minimum speed below 45ºF in
the heating mode and above 115ºF ensure the compressor capacity is
sufficient for oil return. If alert code 433 occurs and inverter does not
indicate an inverter code 29, the Comfort-Aire or Century
communicating Comfort-Aire or Century outdoor control triggered the
alert code 433.
• Inverter LEDs will flash code 29.
• Refer to the unit service documentation for detailed
troubleshooting procedures.
Inverter flash code 29.
The sequence is:
•
Red LED: Two Flashes
•
Green LED: Nine Flashes
NOTE:
Inverter normal operations with no error code present is as
follows. Red LED is ON and Green LED is OFF.
To clear alert code
disconnect power
to both the indoor
and outdoor units
and then reconnect
power. Restart
system.
Table 12. Alert Codes and Troubleshooting