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

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Domestic air conditioner
HSU-18HEA03/R2(DB)-I
Service Diagnosis
7.3.10 Power Supply Over or under voltagve fault
outdoor display: LED1 flash 6 times The power supply is over voltage.
Method of
An abnormal voltage rise or fall is detected by checking the specified voltage detection circuit.
Malfunction
Detection
Malfunction
An voltage signal is fed from the voltage detection circuit to the microcomputer
Decision
Conditions
Supposed
Ƶ Supply voltage not as specified
Causes Ƶ the IPM module is broken
Ƶ the outdoor PCB is broken
Troubleshooting
* Caution Be sure to turn off power switch before connect or disconnect connector, or
else parts damage may be occurred.
About how to check the IPM module,please refer to IPM protection fault
Check the power supply
Is it rated power?
No
Yes
Yes
Check the IPM
module
Is it normal?
No
This question may be caused by the
power
Change the new one
Change the outdoor PCB

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

General

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