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V6R VRF 50Hz

Part

Diagnosis and Troubleshooting

Procedure

ODU power supply is abnormal or a

phase is missing

Yes

Provide normal power supply

Wires between outdoor main PCB, AC

filter boards and electric control box

power supply terminals are loose

Yes

Ensure the wires are connected properly

High voltage circuit error has occurred,

such as the compressor has malfunction

the fan motor has short-circuited

, or the

inverter module has short-circuited

Yes

Replace or repair the relevant parts

Replace the outdoor main PCB

Notes:

1. The normal voltage between A and N, B and N, and C and N is 198-242V.

2. The normal resistances of the inverter compressor are 0.05-0.15Ω among U V W and infinite between each of U V W and ground. If any of the resistances

differ from these specifications, the compressor has malfunction.

3. The normal resistances of the fan motor coil among U V W are less than 10Ω. If a measured resistance is 0Ω, the fan motor has short-circuited.

4. Set a multi-meter to buzzer mode and test any two terminals of P N U V W of the inverter module. If the buzzer sounds, the inverter module has short-

circuited.

Figure 6-2.1: Inverter module terminals