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V6 VRF 50Hz

Part 6 - Diagnosis and Troubleshooting

Procedure 2.12.5

Electronic expansion valve coil

connection on main PCB is loose

Yes

Ensure the sensor is connected properly

Electronic expansion valve coil has

malfunctioned

Yes

Replace the sensor

Replace outdoor main PCB

Notes:

1. Electronic expansion valve coil connections are port CN70, CN71 and CN72 on the main PCB (labeled 18, 19 and 20, respectively, in Figure 5-2.1 in Part 5,

2.1 “Ports”).

2. The normal resistances between EXV coil wiring terminals RED and white / yellow / orange / blue are 40-50Ω. If any of the resistances differ from the value,

the EXV coil has malfunctioned.

Figure 6-2.3: EXV coil wiring terminals