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V6 VRF 50Hz

Part 6 - Diagnosis and Troubleshooting

Procedure 2.11.5

F3 / F5

Temperature sensor connection on main

PCB is loose

Yes

Ensure the sensor is connected properly

Temperature sensor has short-circuited

or failed

Yes

Replace the sensor

Replace outdoor main PCB

Notes:

1. Plate heat exchanger cooling refrigerant inlet temperature sensor (T6A) and plate heat exchanger cooling refrigerant outlet temperature sensor (T6B)

connection are port CN8 and CN8_1 on the main PCB (labeled 10 and 12, respectively, in Figure 5-2.1 in Part 5, 2.1 “Ports”).

2. Measure sensor resistance. If the resistance is too low, the sensor has short-circuited. If the resistance is not consistent with the sensor’s resistance