Haier AU96NFTAHA Service Manual page 71

[21] High pressure switch system circuit (inverter)
A
Whether the
indoor fan is normal
(heat)
Yes
Whether
indoor PMV is
normal
Yes
Whether
there is the factor
affecting indoor heat
exchange
1.Filter is blocked
2.Heat exchanger is blocked
3.Airflow is in short
circuit
No
Whether the
indoor and outdoor
communication line is
normal
Yes
The refrigerant is
overfed, refrigerantpipe is bent, abnormaloverloading
No
connection of the connectors,
capacitor and fan motor
No
Whether
connecting winding of the
connectors is normal
Yes
Whether the
valve body is blocked
No
No
resistance value/temperature
characteristic of TC2 sensor
Check indoor I/F PCB,
if improper, replace it
68
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Whether the
No
are normal
Yes
No
Modifying
Eliminate interference factor
Yes
Replace PMV main body
Check and modify wiring
Whether the
No
is normal
Yes
Modifying
Replace TC2 sensor