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Service Manual -
HRG18xxS1P
508206-01
Issue 2140
Page 61 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
441
14
1 flash
4
flashes
Information
Only-Dealer
OD Inverter Com-
pressor Slowdown
- High Compres-
sor Current
This alert code is for more information than an issue with the system.
• When the inverter gets close to the current or heat sink temperature
limit, it will limit the ramp rate. Instead of changing compressor
speed at 1 hz/second, it changes to 5 hz/20 seconds.
• Compressor slowdown due to high compressor current.
• Compressor current is approaching limit.
• The compressor speed automatically slows.
• This error code is primarily for informational purposes as the inverter
controls the compressor to operate within design parameters. Alert
code 441 typically occurs at startup as the compressor current
increases rapidly during startup.
• The inverter will reduce the compressor speed by 4 Hz and slow the
compressor ramp up speed to the requested compressor demand
speed (capacity). This is normal and expected operation of the
inverter to control the inverter within design parameters. In most
cases the alert code 441 notification does not require any additional
service or diagnostic procedures.
• The control sets indoor CFM and outdoor RPM to values according
to demand percentage rather than the actual Hz.
• 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 14.
• Refer to the unit service documentation for detailed troubleshooting
procedures.
Inverter flash code 14.
The sequence is:
•
Red LED: One Flash
•
Green LED: Four Flashes
NOTE:
Inverter normal operations with no error code present is as
follows. Red LED is ON and green LED is OFF.
Automatically clears
when the condition
no longer exists.
600
Information
Only-Dealer
Load Shed Event
Compressor has been cycled OFF on utility load shedding.
• Load shedding function provides a method for a local utility company
to limit the maximum power level usage of the outdoor unit.
• The feature is activated by applying 24VAC power across the
L
and
C
terminals on the outdoor control
Automatically clears
when L terminal is
inactive.
Table 19. Outdoor Control 7-Segment Display Alert Codes - Compressor