Lennox iComfort S30 Installation And Setup Manual page 66

Table 1 Alert Codes and Troubleshooting
Applicable
Alert Priority
System
Code Condition
Component(s)
Inverter Controlled
439 Moderate
Outdoor unit
Inverter Controlled
440 Moderate
Outdoor unit
Inverter Controlled
441 Moderate
Outdoor unit
442 Critical Outdoor unit
Critical alerts are displayed on the Home screen, in the Homeowner alert button, and in the Installer alert button.
Minor and moderate alerts are found only in the Installer alert button.
Actual Displayed Alert
Component or System Operational State and Troubleshooting Tip
Text
Compressor slowdown due to high input current.
√ Input current is approaching a high limit.
√ Compressor speed will automatically slow down. The outdoor control will
continue sending the inverter speed demanded by the thermostat.
OD Inverter Compressor
Slowdown - High Input
√ The outdoor control will set indoor CFM and outdoor RPM to values accord­
Current
ing to demand percentage rather than the actual Hz.
√ Inverter LEDs will blink code 12.
√ Refer to the unit service documentation for detailed troubleshooting proce­
dures.
Compressor slowdown due to high heat sink temperature.
√ Heat sink temperature is approaching limit.
√ The compressor speed automatically slows to reduce heat sink tempera­
ture.
√ The control sets indoor CFM and outdoor RPM to values according to de­
mand percentage rather than the actual Hz.
√ Feedback from supplier tear down of inverter indicates that the screws that
OD Inverter Compressor
Slowdown - High
hold the inverter to the inverter board were loose causing poor contact be­
Heat-Sink temperature
tween 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 blink code 13.
√ Refer to the unit service documentation for detailed troubleshooting proce­
dures.
Compressor slowdown due to high compressor current.
√ Compressor slowdown due to high compressor current.
√ Compressor current is approaching limit.
√ The compressor speed automatically slows.
√ The control sets indoor CFM and outdoor RPM to values according to de­
OD Inverter Compressor
mand percentage rather than the actual Hz.
Slowdown - High
√ Possible issue is system running at high pressures.
Compressor Current
√ Check for high pressure trips or other alert codes in iComfort
door control.
√ Inverter LEDs will blink code 14.
√ Refer to the unit service documentation for detailed troubleshooting proce­
dures.
The top cap switch has opened five times within one hour. As a result, the
outdoor unit is locked out
Compressor Top Cap
√ This condition occurs when compressor thermal protection sensor opens
Switch Strike Lockout
five times within one hour.
√ Outdoor unit will stop.
.
66
How to clear alert code
Automatically clears when the
condition no longer exists.
Automatically clears when the
condition no longer exists.
Automatically clears when the
condition no longer exists.
®
S30 and out­
To clear, disconnect power to out­
door unit and restart.