Fault Code 21 – Inverter Current Sensor Fault; Fault Code 22 – Heat Exchanger Sensors Te/Ts; Fault Code 23 – Discharge Temperature Sensor - Carrier 30AWH004HB Service Manual

Fault code 21 – Inverter current sensor fault
Is the power supply cabling and sensor
cabling correct? (See Wiring Diagrams)
Fault code 22 – Heat exchanger Sensors TE/TS
Are the sensors correctly connected?
(See Wiring Diagrams)
Are the resistance characteristics of the
temperature sensors normal?*
Check Inverter board - replace if defective
Fault code 23 – Discharge Temperature Sensor
Is the sensor correctly connected?
(See Wiring Diagrams)
Are the resistance characteristics of the
temperature sensor normal?*
Check Inverter board - replace if defective
SM_30AW.indd 82
YES
Check inverter board
YES
YES
YES
YES
NO
Check and correct cable
NO
Correctly connect the Sensors
NO
Replace defective Sensors
*Check resistance table
NO
Correctly connect the Sensor
NO
Replace defective Sensor
*Check resistance table
82
6
Diagnostic
30AW
14-03-2011 14:45:35