Haier HSU-18HEA03/R2(DB)-I User Manual

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Domestic air conditioner
HSU-18HEA03/R2(DB)-I
Service Diagnosis
7.3.4 IPM protection
outdoor display LED1 flash 2 times:
Method of IPM protection is detected by checking the compressor running condition and so on.
Malfunction
Detection
Malfunction
Ƶ The system leads to IPM protection due to over current
Decision
Ƶ The compressor faulty leads to IPM protection
Conditions
Ƶ circuit component of IPM is broken and led to IPM protection
Supposed
Ƶ IPM protection dues to the compressor faulty
Causes Ƶ IPM protection dues to faulty PCB of IPM module
Ƶ Compressor wiring disconnected
Troubleshooting
* Caution Be sure to turn off power switch before connect or disconnect connector, or
else parts damage may be occurred.
Check the IPM module method:
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 k to several M (и)
Unacceptable resistance Short (0 ) or open
Turn off the power.check if the
compressor wiring connect.
NO
Check the IPM module
Yes
Normal?
Yes
NO
Test the resistance values among
Phases U, V and W of compressor
If the resistance are
equal or less than 3ȍ
NO
Yes
Renewedly connect the wiring
Change the IPM module
Replace the compressor
Check the installation
condition.

Haier HSU-18HEA03/R2(DB)-I Specifications

General

Brand	Haier
Model	HSU-18HEA03/R2(DB)-I
Category	Air Conditioner
Language	English