Modifying improper
portion
86
Whether the
indoor fan is normal
(heat)
A
No
Whether the
connection of the connectors,
capacitor and fan motor are
normal
No
Modifying improper
portion
Whether
indoor PMV is normal
No
No
Whether connecting
winding connection
of the connectors are
normal
Whether
there is the factor
affecting indoor heat
exchange
1. Filter screen is blocked
2.Heat exchanger is blocked
3.Airflow is in short
circuit
Eliminate interference
factor
No
Whether the
valve body is blocked
Whether the indoor
and outdoor communication
line is normal
No
Yes
Replace PMV main
body
Check and modify
wiring
Yes
The refrigerant is overfed,refrigerant pipe is bent,abnormal overloading
Whether the
resistance value/temperature
characteristic of TC2 sensor
is normal
No
No
Replace TC2 sensor
Yes
Check indoor PCB, ifimproper, replace it
Yes
Yes
Yes
Yes
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