YMGI
•
Your Modern Green Idea
67
Common Malfunction and Troubleshooting
Check the following items before contacting for repair.
Phenomenon
Reason
Measure
The unit doesn’t run.
Without power supply
Connect to power supply
Voltage is too low
Check if the voltage is within rating range
Broken fuse or breaker trips off
Replace fuse or connect breaker
Insufficient energy of remote controller
Replace new battery
Remote controller is out of control scope
Control scope is within 8m
Unit runs but stop
immediately
Air intake or outlet of indoor or outdoor
unit is blocked
Remove obstruction
Abnormal cooling or
heating
Air intake or outlet of indoor or outdoor
unit is blocked
Remove obstruction
Improper temperature setting
Adjust setting at wireless remote controller or wired controller
Fan speed is set too low
Adjust setting at wireless remote controller or wired controller
Wind direction is not correct
Adjust setting at wireless remote controller or wired controller
Door or windows are opened
Close the door or windows
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 for dirt
Clean the filter
1.
When installing remote monitor or central controller, displacement on indoor units’ project codes must be made. Otherwise,
there will be collision malfunction of the project codes. For detailed operation methods, please refer to the VRF Installation
and Maintenance Manual.
2. If problem cannot be solved after checking the above items, please contact YMGI service center with issue(s) and model
numbers of units.
Following circumstances are not malfunction.
“Malfunction”
Reason
Unit doesn’t run
When unit is restarted immediately after it is
turned off
Overload protection switch lets it run after 3 minutes delay
When power is turned on
Standby operating for about 1 minute
Mist comes from the unit
In cooling mode
Indoor high humidity air is cooled rapidly
Noise is emitted
Slight cracking sound is heard when just
turned on
Sound is made when electronic expansion valve initializes
There is consecutive sound when cooling
Sound is gas refrigerant flowing in unit
There is sound when unit starts or stops
Sound made when gas refrigerant stops flowing
There is slight and consecutive sound when
unit is running or after running
Sound is operation of drainage system
There is sound when unit starts or stops
Sound made when gas refrigerant stops flowing
There is slight and consecutive sound when
unit is running or after running
Sound is operation of drainage system
Cracking sound is heard when unit is
operating and after operating
Sound is caused by expansion of panel and other parts
due to temperature change
The unit blows out duct
Unit is run after not being used for prolonged
period
Dust in indoor unit is blown out
The unit emits odor
Operating
Odors absorbed by the unit filter are blown out again
Indoor unit still runs after
switched off
After every indoor unit receive "stop" signal,
fan will keep running
Indoor fan motor will keep running 20-70 sec. to vent
excess cooling or heating and prepare for next operation
Mode conflict
COOL or HEAT mode cannot be operated
When the indoor operating mode conflicts with the
outdoor unit, indoor fault indicator will flash and a conflict
will be indicated on the wired controller after 5 minutes.
Indoor unit will stop running and the outdoor unit operating
mode will switch to the same as that of indoor unit. The
unit will go back to normal operation. COOL mode does
not conflict with DRY mode. FAN mode does not conflict
with any mode.
