Haier AU96NFTAHA Service Manual page 72

[22] High pressure protection action (Pd sensor)
Whether the
characteristic of high pressure
sensor is normal
Yes
Whether the
shutoff valve is fully
open
Yes
Whether the
outdoor fan can normally
run (cool)
Yes
Whether there
is the factor affecting
heat exchange of outdoor unit
1.Heat exchanger is blocked
2.Airflow is in short circuit
No
Whether the
SV2 by-pass loop is
normal
Yes
A
No
No
No
Whether the
connection of the connectors,
capacitor and fan motor
are normal
Yes
No
Check outdoor INV PCB,
if improper, replace it
69
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Check the part, if improper,replace it
Fully open shutoff valve
No
Modifying
Eliminate interference factor
Repair SV2 by-pass loop
(Coil winding is improper, wire is
broken)