Haier 2HUM18HC03/R2 - Overheat Protection for Exhaust Temperature

2HUM18HC03/R2(DB)-SM Wiring diagrams
58
Domestic air conditioner
Troubleshooting * Caution Be sure to turn off power switch before connect or disconnect connector,
or else parts damage may be occurred.
7.3.9 Overheat Protection For Exhaust Temperature

outdoor display LED1 flash 8 times
Method of
The exhaust temperature control is checked with the temperature being detected
Malfunction by the exhaust pipe thermistor
Detection
Malfunction
when the compressor discharge temperature is above 110ć
Decision
Conditions
Supposed Ŷ
Electronic expansion valve defective
Causes Ŷ Faulty thermistor
Ƶ
Faulty PCB
Troubleshooting
* Caution Be sure to turn off power switch before connect or disconnect connector, or
else parts damage may be occurred.
Electrify the machine again and turn it on with
the remote controller. Check whether the
compressor is started normally
Is it ok?
Yes
Maybe there is some disturbance
NO
No
~230 is ok?
Yes
Yes
This question may be caused by the power.Repair
the power supply.
NO
Change the IPM module
Change the IPM module
Test the outdoor power supply
(+310VDC) with a multimeter.
check whether the power
is >150 V or <390V?