Troubleshooting Guide - Hitachi R410A Series Installation And Operation Manual

Care and maintenance
•

Troubleshooting guide

Please check the following items before asking for repair, it saves your
time and money.
Fault phenomenon
Air conditioner
does not operate
at all.
Cooling
efficiency is
not good.
Foggy air
flows out.
The air conditioner
operation is noisy.
It seems that condensate is leaking
from air conditioner.
Air conditioner does not operate
for about 3 minutes when restart.
Trouble - shooting
 Is there a power failure?
 Is the plug out?

Is power fuse or switch off ?

Whether the voltage is too high
or too low ?

Is air inlet or outlet blocked?

Is there any other heat source in
room?
 Are air filters dirty ?
 Is the indoor fan speed set at LOW?
 Maybe the room is too hot when the
unit starts.
 At COOL mode operation, sometimes
there is foggy air flowing out from the
unit, this is because the room humid
air has been cooling rapidly.
 The unit is normal while the indoor
outlet is sending out some odor, because
the inlet air may be mixed with the smell
of furniture and smoke.

For a noise that sounds like water
flowing:
This is the sound of freon flowing
inside the air conditioner unit.
 For a noise that sounds like a shower:
This is the sound of the dehumidifying
water being processed inside the air
conditioner unit.
 Condensate occurs when the airflow
from the air conditioner cools the
warm room air.
 This is to protect the mechanism.

Wait about 3 minutes and operation
will begin.
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