Haier AU96NFTAHA Service Manual page 67

[14] Overcurrent protection circuit of inverter
Whether the
power voltage is normal
Yes
Whether the
connection of the connectors
is normal
Yes
Whether the
Mg-SW acts (AC contactor)
Yes
Whether the
compressor is normal
Yes
Whether the IGBT is normal
Yes
Whether the
3-phase rectifying bridge is normal
Yes
Whether the
electrolytic capacitor for wave
filtering is normal
Yes
No
No
No
Whether the AC fuse is broken
Whether the
49C pressure built-in thermal protector
(IOL) and 63 high-pressure
switch act
No
No
No
No
Check outdoor I/F PCB,
if improper, replace it
64
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Improve power supply circuit
Check and modify circuitwiring, chec
Yes
Replace the fuse
Check the reason ofabnormal o
Yes
C h e c k w h e t h e r t h e compressor
Check the condition ofIGBT, if im
Check 3-phase rectifyingbridge, if i
Check the capacity , ifimproper, repl