Lennox iComfort S30 Installation And Setup Manual page 63

Table 1 Alert Codes and Troubleshooting
Applicable
Alert Priority
System
Code Condition
Component(s)
Moderate /
Inverter Controlled
428
Outdoor unit
Critical
Moderate /
Inverter Controlled
429
Outdoor unit
Critical
Moderate / Inverter Controlled
430
Outdoor unit
Critical
Moderate / Inverter Controlled
431
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 high main input current condition
√ If condition is detected, outdoor unit will stop (compressor and fan) – mod­
erate condition.
√ Anti-short cycle is initiated.
OD Inverter High Main
√ If condition occurs 10 times within an hour, system will lockout – critical
Input Current
condition.
√ Inverter LEDs will blink code 22.
√ Refer to the unit service documentation for detailed troubleshooting proce­
dures.
The inverter has detected a DC link low voltage condition
√ On a call for compressor operation, if DC link power in inverter does not rise
above 180 VDC for 2- and 3 -ton models, 250 VDC for 4- and 5-ton models
within 30 seconds, the control will display a moderate code.
√ If condition is detected, outdoor unit will stop (compressor and fan) – mod­
erate condition.
√ An anti-short cycle timer is initiated. If condition occurs 10 times within a 60
OD Inverter DC Link Low
minute rolling time period, system will lock out and display alert code 429
Voltage
– critical condition.
√ The outdoor control anti-short cycle timer will time out and the unit will recy­
cle the demand.
√ Replace outdoor inverter.
√ Inverter LEDs will blink code 23.
√ Refer to the unit service documentation for detailed troubleshooting proce­
dures.
Compressor start-up failure.
√ If condition is detected, outdoor unit will stop (compressor and fan) – mod­
erate condition.
√ Anti-short cycle is initiated.
OD Inverter Compressor
√ If condition occurs 10 times within an hour, system will lockout – critical
Startup Fail
condition.
√ Inverter LEDs will blink code 26.
√ Refer to the unit service documentation for detailed troubleshooting proce­
dures.
The inverter has detected a PFC circuit over-current condition
√ Error occurs when PFC detects an over current condition of 100A peak.
√ If condition is detected, outdoor unit will stop (compressor and fan) – mod­
erate condition.
√ Anti-short cycle timer is initiated.
OD Inverter PFC Fault
√ If condition occurs 10 times within an hour, system will lockout – critical
condition.
√ Inverter LEDs will blink code 27.
√ Refer to the unit service documentation for detailed troubleshooting proce­
dures.
.
63
How to clear alert code
.
To clear, disconnect power to out­
door unit and restart.
Automatically clears when the
system detects that the issue no
longer exists.
To clear, disconnect power to out­
door unit and restart.
.
To clear, disconnect power to out­
door unit and restart.