37
10.2.4 E5(Open or short circuit of outdoor temperature sensor) diagnosis and solution.
10.2.5 E6(open or short circuit of room or evaporator temperature sensor) diagnosis and solution.
10.2.6 E7(outdoor fan speed out of control) diagnosis and solution
10.2.7 P0(Inverter module or IGBT over-strong current protection) diagnosis and solution.
Is the outdoor fan motor
connector and connection
good?
Repair the connector and
reconnect
Is voltage being applied
to the fan motor right?
NO
YES
Outdoor PCB is defective.
Replace the outdoor PCB.
YES
Replace the outdoor fan
motor
NO
Is all connections on PCB
and between PCB and
compressor good?
Repair or correct the
connector or connection.
Replace the outdoor PCB
and then repower on. Is
the failure cleared?
NO
YES
Check the compressor
NO
Is the indoor temperature
and evaporator sensor
connector and connection
good?
Repair the connector and
reconnect
Replace the sensor and
check if E6 display again?
NO
YES
Replace the.indoor PCB
YES
Is the outdoor temperature
sensor connector and
connection good?
Repair the connector and
reconnect
Replace the sensor and
check if E5 display again?
NO
YES
Replace outdoor e-box
YES
