70
A
Whether the
indoor fan is normal
(heat)
Whether the
connection of the connectors,
capacitor and fan motor
are normal
Modifying
No
Yes
Whether indoor
PMV is normal
No
Whether
connecting winding of the
connectors is normal
Modifying
No
Yes
Yes
Yes
No
Whether there
is the factor affecting
indoor heat exchange
1. Filter is blocked
2.Heat exchanger is blocked
3.Airflow is in short
circuit
Eliminate interference factor
Whether the
indoor and outdoor
communication line is
normal
Whether the
valve body is blocked
Yes
No
No
Replace PMV main body
Check and modify wiring
Yes
Yes
No
The refrigerant is
overfed, refrigerantpipe is bent, abnormaloverloading
Whether the
resistance value/temperature
characteristic of TC2
sensor is normal
Replace TC2 sensor
Check indoor PCB, if
improper, replace it
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