Troubleshooting; Please Remember - Mitsubishi Daiya SRK25ZD-S User Manual

Troubleshooting

Please carry out the following checks before making a service call.
The air conditioner does not work at all.
Has the power switch been
turned off?
Have you set the thermostat at a
suitable temperature?
suitable
temperature
Is there any direct sunlight en-
tering the room?
A new refrigerant (R410A) is used in this air-conditioner. When asking the dealer for
service or inspection and maintenance, explain the dealer about this matter.

Please remember!

You cannot restart the unit immediately after you have
stopped it.
Air is not blown out when starting the HEATING operation.
Air is not blown out for 5 to 10 min. at HEATING operation.
Air is not blown out when starting the DRY operation.
Some steam escapes during COOL operation.
Has the timer been set in the
"ON" position?
Poor cooling or heating
Is the air filter clean? (Not
clogged?)
Poor cooling
Is there a heat source in the
room?
(RUN light is on)
Not
operating?
RUN light blinks slowly
(1.5 sec ON, 0.5 sec OFF)
RUN light blinks slowly
(1.5 sec ON, 0.5 sec OFF)
(RUN light is on)
– 17 –
Is there a power failure or a
blown fuse?
Did you leave any doors or
windows open?
Are there too many people in
the room?
Restarting has been blocked for 3 minutes after you have stopped, to
protect the unit.
Please wait for
three minutes.
The three-minute protection timer in the microcomputer automatically
starts up again. This function is not activated if you have disconnected
the power.
Air flow has stopped to prevent blowing out of cold air until the indoor
heat exchanger has warmed up. (2 to 5 min.) (HOT KEEP)
When outdoor temperature is low and humidity is high, the unit some-
times performs defrosting automatically. Please wait. During defrost-
ing, water or steam may escape from the outdoor unit.
The indoor fan may stop to prevent re-evaporation of dehumified
moisture and to save energy.
This may occur if the room's temperature and humidity are very high.
It disappears as soon as the temperature and humidity decrease.
If the air conditioner does not oper-
ate properly after you have checked
the above points, or if any doubt still
exists after you have consulted page
17, or if things happen as shown on
page 18, switch off the power and
contact your dealer.