Timer; Emergency Operation For Ir Wireless Remote Controller; Care And Cleaning; Trouble Shooting - Mitsubishi Electric PCA-A·KA4 Operation Manual

4. Timer

Timer functions are different by each remote controller.
For details on how to operate the remote controller, refer to the appropriate operation manual included with each remote controller.

5. Emergency Operation for IR wireless remote controller

(For PCA-A·KA4)
Fig. 5-1
(For PKA-A·HA4)
Fig. 5-2
When the IR wireless remote controller cannot be used
When the batteries of the IR wireless remote controller run out or the IR
wireless remote controller malfunctions, the emergency operation can be
done using the emergency buttons.
[Fig. 5-1] DEFROST/STAND BY lamp
Operation lamp
Emergency operation switch (heating)
Emergency operation switch (cooling)
Receiver

6. Care and Cleaning

Following indication shows that the filter needs cleaning.
• Wired remote controller : "FILTER"
• RF thermostat : "Clean Filter"
• ASK authorized pepole to clean the filter.
When resetting "FILTER" or "Clean Filter" display. Resetting the
indication, refer to the operation manual of each remote controller.

7. 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 tem-
perature is reached.
Starting operation
• To operate the cooling mode, press the
seconds.
• To operate the heating mode, press the
seconds.
Stopping operation
• To stop operation, press the
than 2 seconds.
[Fig. 5-2]
• Each press of the emergency operation switch will toggle the operation
mode.
• Check "COOL/HEAT" with the operation monitor display. (The orange
E.O.
lamp
SW
emergency operation switch.)
[Heat pump type]
Operation Monitor Display
STOP
COOL
HEAT
Note:
• Details of emergency mode are as shown below.
Operation mode
Set temperature
Fan speed
Airflow direction
Note:
When 2 or more different types of indoor unit are controlled, the cleaning
period differs with the type of filter. When the master unit cleaning period
arrives, "FILTER" is displayed. When the filter display goes off, the cumu-
lative time is reset. (only for wired remote controller)
"FILTER" or "Clean Filter" indicates the cleaning period when the air
conditioner was used under general indoor air conditions by criteria time.
Since the degree of dirtiness 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 IR wireless remote controller.
Clean the filter. (Airflow is reduced when the filter is dirty or clogged.)
Check the temperature adjustment and adjust the set temperature.
Make sure that there is plenty of space around the outdoor unit. Is the
indoor unit air intake or outlet blocked?
Has a door or window been left open?
Warm air does not blow until the indoor unit has sufficiently warmed
up.
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.
button
DEFROST/STAND BY lamp (Orange)
Operation lamp (Green)
Emergency operation switch (cooling/heating)
Receiver
follows this monitor display for 5 seconds after pressing the
Cooling Heating Stop
GREEN ORANGE
○ ○
The orange lamp follows the
switch operation as indicated
● ○
at the left for 5 seconds, and
● ● then it will return to the normal
display.
: Turning off : Lighting
COOL
24°C, 75°F
High
Horizontal
Here is the solution. (Unit is operating normally.)
button for more than 2
button for more than 2
or the button for more
[Cooling only type]
Cooling Stop
HEAT
24°C, 75°F
High
Downward 4 (5)
5