V6 VRF 50Hz
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Part 6 - Diagnosis and Troubleshooting
Procedure 2.5.5
Temperature sensor connection on main
PCB is loose
1
Ensure the sensor is connected properly
Temperature sensor has short-circuited
or failed
2
Notes:
1. Outdoor ambient temperature sensor (T4) and heat exchanger temperature sensor (T3) connection is port CN1 on the main PCB (labeled 11 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
characteristics table, the sensor has failed. Refer to Table 6-3.1 in Part 6, 3.1 “Temperature Sensor Resistance Characteristics”.