Lennox iComfort S30 Installation And Setup Manual page 64

Table 1 Alert Codes and Troubleshooting
Applicable
Alert Priority
System
Code Condition
Component(s)
Moderate /
Inverter Controlled
432
Outdoor unit
Critical
Moderate /
Inverter Controlled
433
Outdoor unit
Critical
Moderate /
Inverter Controlled
434
Outdoor unit
Critical
Moderate /
Inverter Controlled
435
Outdoor unit
Critical
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
The inverter has detected a DC link high voltage condition.
√ Error occurs when the DC link capacitor voltage is greater than 480VDC.
√ If condition is detected, outdoor unit will stop (compressor and fan) – mod­
erate condition.
√ Anti-short cycle timer is initiated.
OD Inverter DC Link High
Voltage
√ If condition occurs 10 times within an hour, system will lockout – critical
condition.
√ Inverter LEDs will blink code 28.
√ Refer to the unit service documentation for detailed troubleshooting proce­
dures.
Compressor phase current is too high.
√ Error occurs when compressor peak phase current is greater than 28A.
√ Inverter will issue 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.
OD Inverter Compressor
√ Anti­short cycle timer is initiated.
Overcurrent
√ If condition occurs five times within an hour, system will lockout – critical
condition.
√ Inverter LEDs will blink code 29.
√ Refer to the unit service documentation for detailed troubleshooting proce­
dures.
Outdoor control has lost communications with the inverter for greater than
three minutes.
√ Outdoor control has lost communications with the inverter for greater than
three minutes.
√ Outdoor control will stop all compressor demands – moderate condition.
√ Recycle power to the inverter by de-energizing the contactor for two min­
utes.
OD Inverter Comm Error
to Main Control
√ If this occurs three times in one thermostat call, the outdoor unit will lock out
and display alert code 434 – critical condition.
√ Check for loose or disconnected electrical connections.
√ Interruption of main power to inverter.
√ Inverter LEDs will blink code 53.
√ Refer to the unit service documentation for detailed troubleshooting proce­
dures.
Inverter internal error.
√ When this error occurs, the outdoor control will cycle power to the inverter
by opening the contactor for two minutes – moderate condition.
√ Outdoor control will cycle power to the inverter three times and then outdoor
OD Inverter EEPROM
Checksum fault
unit is locked out – critical condition.
√ Inverter LEDs will blink code 60.
√ Refer to the unit service documentation for detailed troubleshooting proce­
dures.
64
How to clear alert code
To clear, disconnect power to out­
door unit and restart.
To clear alert code disconnect
power to outdoor unit and restart.
Automatically clears when the
system detects that the issue no
longer exists.
To clear alert code disconnect
power to outdoor unit and restart.