Service Manual -
HRG18xxS1P
508206-01
Issue 2140
Page 59 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
430
26
2
flashes
6
flashes
Service Soon/
Service
Urgent
OD Inverter
Compressor
Startup Fail
Compressor start-up failure.
• If condition is detected, outdoor unit will stop (compressor and fan)
– moderate condition.
• Anti-short cycle is initiated.
• If condition occurs 10 times within 60 consecutive minutes, the
system will lockout – critical condition.
• Inverter LEDs will flash code 26.
• Refer to the unit service documentation for detailed troubleshooting
procedures.
Inverter flash code 26.
The sequence is:
•
Red LED: Two Flashes
•
Green LED: Six Flashes
NOTE:
Inverter normal operations with no error code present is as
follows. Red LED is ON and Green LED is OFF.
•
Check refrigerant
•
Replace outdoor control board
•
Replace inverter.
To clear, disconnect
power to outdoor unit
and restart.
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 pow-
er. Restart system.
Table 19. Outdoor Control 7-Segment Display Alert Codes - Compressor