Haier HSU-22HVA103/R2(DB) User Manual

7.2.3 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 ■
The system leads to IPM protection due to over current
Decision ■
The compressor faulty leads to IPM protection
Conditions ■
circuit component of IPM is broken and led to IPM protection
Supposed ■
IPM protection dues to the compressor faulty
Causes ■ IPM protection dues to faulty PCB of IPM module
■ 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 (∗)
Unacceptable resistance Short (0 ) or open
7.2.4 The IPM and outdoor PCB don’t communicate or Related Abnormality
outdoor display LED1 flash 4 times
Turn off the power.check if the
compressor wiring commect.
NO
Check the IPM module
Yes
Normal?
Yes
NO
Test the resistance values among
Phases U, V and W of com
pressor
If the resistance are
equal and less than 3
NO
Yes
Renewedly connect the wiring
Change the IPM module
Replace the compressor
Check the installation
condition.
HSU-18,22HVA103/R2(DB) Service Diagnosis
79
Domestic Air Conditioner

Haier HSU-22HVA103/R2(DB) Specifications

General

Brand	Haier
Model	HSU-22HVA103/R2(DB)
Category	Air Conditioner
Language	English