7.2.9 High work-intense protection
Indoor display
E9
Method of
High work-intense control is activated in the heating mode if the temperature being sensed
Malfunction
by the heat exchanger thermistor exceeds the limit.
Detection
Malfunction
Activated when the temperature being sensed by the heat exchanger thermistor rises above
Decision 74
℃ twices in 30 minutes.
Conditions
Supposed ■
Faulty electronic expansion valve
Causes ■
Dirty heat exchanger
■
Faulty heat-exchange sensor
■
Insufficient gas
Troubleshooting
* Caution
Be sure to turn off power switch before connect or disconnect connector, or
else parts damage may be occurred.
YES
NO
the malfunction is reported
after the machine has run
for some time?
Check room temperature and pipe
temperature sensor.
Electrify the machine again and turn it on with the remote
controller, check whether the wind temperature is below
74℃
YES
NO
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
The system is over charged with gas
YES
HSU-18,22HVA103/R2(DB) Service Diagnosis
86
Domestic Air Conditioner
To Next Page
Loading...
