Emergency Operation For Wireless Remote-Controller; Care And Cleaning; Trouble Shooting - Mitsubishi Electric PL-KAK Operation Manual

9. Emergency Operation for Wireless Remote-controller
When the remote controller cannot be used
When the batteries of the remote controller run out or the remote control-
ler malfunctions, the emergency operation can be done using the emer-
gency buttons on the grille.
A DEFROST/STAND BY lamp
B Operation lamp
C Emergency operation switch (heating)
D Emergency operation switch (cooling)
E Receiver
10. Care and Cleaning
11. Trouble Shooting
Having trouble?
Air conditioner does not heat or cool well.
When heating operation starts, warm air does not blow from the indoor
unit soon.
During heating mode, the air conditioner stops before the set room
temperature is reached.
Airflow direction changes during operation or airflow direction cannot
be set.
When the airflow direction is changed, the vanes always move up and
down past the set position before finally stopping at the position.
A flowing water sound or occasional hissing sound is heard.
A cracking or creaking sound is heard.
The room has an unpleasant odor.
1
Starting operation
• To operate the cooling mode, press the
• To operate the heating mode, press the
* Lighting of the Operation lamp B means the start of operation.
Note:
• Details of emergency mode are as shown below.
Details of EMERGENCY MODE are as shown below.
Operation mode
Set temperature
Fan speed
Airflow direction
Stopping operation
• To stop operation, press the
n Indicates that the filter needs cleaning.
Ask authorized people to clean the filter.
n When resetting "FILTER" display
When the [FILTER] button is pressed two times successively after
cleaning the filter, the display goes off and is reset.
Note:
● When two or more different types of indoor unit are controlled, the clean-
ing period differs with the type of filter. When the master unit cleaning
period arrives, "FILTER" is displayed. When the filter display goes off, the
cumulative time is reset.
● "FILTER" indicates the cleaning period when the air conditioner was used
under general indoor air conditions by criteria time. Since the degree of dirti-
ness depends on the environmental conditions, clean the filter accordingly.
● The filter cleaning period cumulative time differs with the model.
● This indication is not available for wireless remote controller.
Here is the solution. (Unit is operating normally.)
n Clean the filter. (Airflow is reduced when the filter is dirty or clogged.)
n Check the temperature adjustment and adjust the set temperature.
n Make sure that there is plenty of space around the outdoor unit. Is the
indoor unit air intake or outlet blocked?
n Has a door or window been left open?
n Warm air does not blow until the indoor unit has sufficiently warmed up.
n When the outdoor temperature is low and the humidity is high, frost
may form on the outdoor unit. If this occurs, the outdoor unit performs
a defrosting operation. Normal operation should begin after approxi-
mately 10 minutes.
n During cooling mode, the vanes automatically move to the horizontal
(down) position after 1 hour when the down (horizontal) airflow direc-
tion is selected. This is to prevent water from forming and dripping
from the vanes.
n During heating mode, the vanes automatically move to the horizontal
airflow direction when the airflow temperature is low or during defrost-
ing mode.
n When the airflow direction is changed, the vanes move to the set posi-
tion after detecting the base position.
n These sounds can be heard when refrigerant is flowing in the air con-
ditioner or when the refrigerant flow is changing.
n These sounds can be heard when parts rub against each due to ex-
pansion and contraction from temperature changes.
n The indoor unit draws in air that contains gases produced from the
walls, carpeting, and furniture as well as odors trapped in clothing,
and then blows this air back into the room.
button D .
button C .
COOL HEAT
24°C 24°C
High High
Horizontal Downward 4
button D or the button C .