Service manual

Indoor unit display LED STATUS

E6 Open or short circuit of room or evaporator coil temperature sensor

Indoor unit display LED STATUS

P0 Inverter module protection

Indoor unit display LED STATUS

P1 Over voltage or too low voltage protection

Is the power supply good?

Be sure the power supply is

normal when using the units

YES

Replace the outdoor e-box.

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?

YES

Replace the.indoor PCB

YES

Yes

Check the connectors in outdoor PCBs。Is connection to connector

good?

Is the wires to compressor right

Check the outdoor inverter module。

Is it breakdown between

P-N,P-U,P-V; P-W;N-W,N-U,N-V

At inverter module

Normally, P-N: ~1.0MΏ, P-U: ~2.0MΏ

P-V: ~2.0M

, P-V: ~2.0M

; N-W: ~1.0M

Check compressor

Check the resistance between the terminal U, V, W with multimeter, if Ruv=Ruw=Rwv, it is

OK. Otherwise, to replace the compressor.

Inverter module is defective,

Repair connector