Kaisai KMK-60RY1, Service Manual

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M thermal Split
100 202004
Midea
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Procedure 4.22.4
Pd
Air side heat exchanger refrigerant outlet
temperature sensor is loose
1
Yes
Ensure the temperature sensor is
connected properly
No
Air side heat exchanger refrigerant outlet
temperature sensor has short-circuited
or failed
2
Yes
Replace the temperature sensor
No
The air side heat exchanger heat
exchange is poor
3
Yes
Inspect the system and fix the error
No
The fan or fan motor is blocked or
damaged
Yes
Inspect the system and fix the error
No
Replace outdoor main PCB
Notes:
1. Air side heat exchanger refrigerant outlet temperature sensor and outdoor ambient temperature sensor connection port are CN9 on
the KHA-06(08,10)RY1 outdoor unit refrigerant system main PCB (labeled 12 in Figure 4-2.2 in Part4, 2.3 "Main PCB for Refrigerant System, Inverter
Module"). port CN9 on the KHA-12(14,16)RY3 outdoor unit refrigerant system main PCB (labeled 17 in Figure 4-2.4 in Part 4, 2. 3 "Main PCB for
Refrigerant System, Inverter Module")
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 Part 2, 1.1 “Outdoor Unit Layout” and to Table 4-5.1 in Part 4, 5.1 “Temperature
Sensor Resistance Characteristics”.
3. Check air side heat exchanger, fan and air outlets for dirt/blockages.
4. High pressure switch connection is port CN13 on the
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