Troubleshooting; Notice - Mitsubishi Electric SRK25ZJP-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?
An alternative refrigerant (R410A) is used in this air-conditioner. When asking your
dealer for service or inspection and maintenance, explain the dealer about it.

Notice

The unit does not restart immediately after you have
stopped it.
Airflow is not blown out when starting the HEATING opera-
tion.
Airflow is not blown out for 5 to 10 min. or blown out not
warm wind for a moment at HEATING operation.
Airflow 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)
– 18 –
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?
Restart is blocked for 3 minutes after you have stopped the operation
to protect the unit.
Please wait for
three minutes.
The three-minute protection timer in the microcomputer automatically
starts it up again.
Airflow has stopped to prevent blowing out of cold air until the indoor
heat exchanger has warmed up. (2 to 5 min.) (HOT KEEP program)
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 left points, or if any doubt still
exists after you have consulted page
18, or if things happen as shown on
page 19, switch off the power and
contact your dealer.