DC Inverter Multi VRF System User Manual
22
6 Common Malfunctions and Troubleshooting
Warning:
①
If there is abnormal condition (e.g. unpleasant smell), turn unit off and disconnect power
immediately. Then contact
C&H
authorized service center. If unit continues operation despite the
abnormal condition, it may get damaged and lead to electric shock or fire hazard.
②
Do not repair the air conditioner by yourself. Improper maintenance may lead electric shock or
fire hazard. Please contact
C&H
authorized service center for maintenance.
◆
Please check the items below before calling for
Problems
Causes
What to do
Unit doesn’t work
Fuse or circuit breaker is cut off
Replace fuse or reset the circuit breaker
Power failure
Restart unit when power is restored
Power is not connected
Connect the power
Remote controller’s power is not enough
Replace new battery
Remote controller is out of the control range Control range is within 8m
Unit runs but stops
immediately
Air inlet or air outlet of indoor and outdoor
units is blocked
Clear obstructions
Abnormal cooling
or heating
Air inlet or air outlet of indoor and outdoor
units is blocked.
Clear obstructions
Improper temp setting
Adjust setting at remote controller or wired
controller
Fan speed is set too low
Adjust setting at remote controller or wired
controller
Wind direction is not correct
Adjust setting at remote controller or wired
controller
Door or window is open
Close the door or window
Direct sunshine
Draw curtain or louver
Too many people in the room
Too many heat resources in the room
Reduce heat resources
Filter is blocked and dirty
Clean the filter
Note: If problem cannot be solved after checking the above items, please contact
C&H
service
center and describe the cases and models.
◆
Following circumstances are not malfunctions.
Malfunction
Reason
Unit doesn’t run
Unit starts up immediately after it is turned off Overload protection switch makes it run after
a 3-min delay
Power is just turned on
Standby operation lasts for about 1min
Mist comes from
the unit
Under cooling
Indoor air with high humidity is cooled rapidly
Noise is emitted
Slight cracking sound is heard when unit is
just turned on
It is the noise when electronic expansion
valve is initialized.
There is consecutive sound when cooling
It is the sound for gas refrigerant flowing in the unit
There is sound when unit starts or stops.
It is the sound when gas refrigerant stops
flowing
There is slight and consecutive sound when
unit is running or after running
This is the sound of drainage operation
Cracking sound is heard when unit is running
or after running
This is the sound caused by the expansion
of panel and other parts of the unit due to
temperature change
Unit blows out dust Unit starts up after not operating for a long time Dust in indoor unit is blown out
Unit emits odor. Under operation
Unit absorbs the room odor and then blows it out
