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Idiomas disponibles
Idiomas disponibles
Installation Instructions
System Test
Please explain to the customer how to operate the system
by using the Owner's Manual found with the indoor unit.
Explaining Operation To the End User
• Using the User Manual, explain to the user how to use
the air conditioner/heat pump, (the remote controller,
adding/removing the air filters, placing or removing
the remote controller from the remote control holder,
cleaning methods, precautions for operation, etc.)
• Review precautions for operation.
• Recommend that the user read the Operating
Instructions carefully.
Troubleshooting
Problem
The unit cannot be
turned on.
The unit operates but
stops immediately.
Abnormal cooling or
heating.
Unit doesn't run.
Mist comes from the
unit.
The unit is making
noises
The unit blows out dust. When unit runs after no operation for a long
The unit smells
abnormal
Indoor unit still runs
after switch off.
20
Final Check
Possible Causes
The unit is not connected to the power supply Connect to power supply
Low voltage
The fuse is broken or the breaker shorted out Replace fuse or connect breaker
Air inlet/outlet of indoor unit is blocked.
Air inlet/outlet of indoor unit is blocked.
Inaccurate temperature setting.
Doors or windows are opened.
Direct sunshine.
Too much heat source in the room.
Filter screen is blocked by dirt.
When unit is started immediately after it is
just turned off.
When power is turned on.
Under cooling.
Slight cracking sound is heard when just
turned on.
There is consecutive sound when cooling.
There is sound when unit starts or stops.
There is slight and consecutive sound when
unit is running or after running.
period.
Operating.
After every indoor unit receive "stop" signal,
fan will keep running.
Check Items for Test Run
No gas leak from linesets?
Are the linesets insulated properly?
Are the connecting wirings of indoor and outdoor firmly
inserted to the terminal block?
Is the connecting wiring of indoor and outdoor fixed?
Is condensate draining correctly?
Is the ground wire securely connected? Is the indoor
unit securely fixed?
Is power source voltage correct according to local
code?
Is there any odd noise?
Does the cooling temperature drop between 20-30°F?
Does the heating temperature raise between 30-40°F?
Is the room temperature display accurate?
Check if circuit voltage is within rated scope.
Remove obstacles.
Remove obstacles.
Adjust setting at wired controller.
Close the door or windows.
Draw curtain or louver.
Reduce heat source.
Clean the filter.
Overload protection switch makes it run after
3 minutes delay.
Standby operating for about 1 minute.
Indoor high humidity air is cooled rapidly.
It is noise when electronic expansion valve
initialization.
That's sound for gas refrigerant flowing in the
unit.
That's sound for gas refrigerant stops flowing.
That's sound for operation of drainage
system.
Dust in indoor unit is blown out.
The room odor absorbed by the unit is blown
out again.
Indoor fan can be set as "ON" or "AUTO"
mode. Under "ON" mode, indoor fan will keep
running after switch off the unit.
Solution
31-5000710 Rev. 2
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