AS24GS1/2ERA 1U24GS1ERA-SM Service Diagnosis
Domestic Air Conditioner
67
(G,B((-/BC.L4EJ/// // LED1 flash 2 times:
W)B((-/=C.L4EJ/ /
5#
/
8*,A(B/(K/
/ / / / / / /
IPM protection is detected by checking the compressor running condition and so on.
8E4KG)+,C()/// / ///
=*,*+,C()
/
8E4KG)+,C()/
/ / / / /
Ƶ
/ /
The system leads to IPM protection due to over current
/
=*+C.C()/
/ / / / / / / /
Ƶ
/ /
The compressor faulty leads to IPM protection
/
"()BC,C()./
/ / / / / /
Ƶ
/ /
circuit component of IPM is broken and led to IPM protection
&GLL(.*B/
/ / / / / / /
Ƶ
/ /
IPM protection dues to the compressor faulty
"EG.*./
/ / / / / / / / / /
Ƶ
/ /
IPM protection dues to faulty PCB of IPM module
Ƶ
Compressor wiring disconnected
P-(GM4*.A((,C)D/// /
X/"EG,C()/ /
Be sure to turn off power switch before connect or disconnect connector, or
else parts damage may be occurred.
"A*+V/,A*/W08/F(BG4*/F*,A(B?/
Disconnect the compressor harness connector from the outdoor unit PCB.
To disengage the connector, press the protrusion on the connector.
Then, to measure resistance between P (+) andN (-) and the U, V and W terminals of the
compressor connector with a multi-tester. Evaluate the measurement results for a pass/fail
judgment.
N(-)terminal of tester(P(+)for digital
tester)
P(+) UVW P(-) UVW
P(+)terminal of tester(N(-)for digital
tester)
UVW P(+) UVW P(-)
Normal resistance
Several kΩ to several MΩ (!)
Unacceptable resistance Short (0 Ω) or open
Turn off the power.check if
the compressor wiring
NO
Check the IPM module
Yes
Normal
Yes
NO
Test the resistance values among
Phases U
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