Circuit diagrams
Domestic air conditioner
11.4.12 High work-intense protection
Electrify the machine again and turn it on with the
remote controller, check whether the wind
temperature is below 65℃
The malfunction is reported
after the machine has run
for some time?
1 、 Check room temperature and
pipe temperature sensor.
2、the temperature monitoring circuit
of the indoor mainboard
The indoor unit blows poorly
due to blocked filters or poor
condition of the fan?
1) Clean the filters
2) Reinstall the fan.
Use some tools to measure the pressure of system，
YES
NO
YES
NO
Method of
malfunction detection
Malfunction detection
conditions
Troubleshooting
High work-intense control is activated in the heating mode if the temperature being
sensed b
the heat exchan
er thermistor exceeds the limit.
Activated when the temperature being sensed by the heat exchanger rises above
65℃ twice in 30 minutes.
■Faulty electronic expansion valve
■Dirty heat exchanger
■Faulty heat-exchange sensor
■Insufficient gas
Supposed causes
* Caution
Be sure to turn off power switch before connect or disconnect connector, or else
parts damage may be occurred.
LED1 flash 21 times
Outdoor diplay
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