Mitsubishi Heavy Industries WRK20MA1, Manual

Indicates frosting protection (Turn off the unit and restart it to return to normal operation).

Failure Indicator Display:

      Indicates a malfunction of the indoor room temperature sensor 
      Indicates a malfunction of the evaporator temperature sensor
      Indicates a malfunction of the outdoor condenser temperature sensor

Note:

 When one of the above malfunctions occurs, turn off the unit, and check for any obstructions. 

          Restart the unit, if the malfunction is still present, turn off the unit and unplug the power cord. 
          Contact the manufacturer or its service agents or a similar qualified person for service.

NEVER operate the air conditioner without the air filter, as 
dust/dirt particles can contribute to equipment failure.

CAUTION

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OPERATING INSTRUCTIONS(continued)

remote display is actual temperature at its location. The remote control will send this signal to the air 
conditioner every 3 minutes interval until press the Follow Me button again.If the unit does not receive 
the Follow Me signal during any 7 minutes interval, the unit will beep to indicate the Follow Me mode 
has ended. 
CHECK FILTER FEATURE:
A

fter 800 hours of operation,   CL   will be displayed and flashed in the display area. This feature is a 

reminder to clean the Air Filter for more efficient operation. After 10 seconds, the system will revert back 
to the previous display again. The   CL   indicator will display and  flash for another 10 seconds at the 
next time starting the unit. To cancel the reminder feaure, press the FILTER CLEAN button on the remote 
controller while the   CL   indicator is flashing.

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9

Indicates the requirement of a filter check after 720 hours of fan operation. Turn off the unit, 
disconnect/unplug from the power supply. Clean the filter, then restore the power, the unit will 
return to normal operation

(on some models)

NOTE: EI=CLEAN AIR FILTER(on some models):

A message prompt  EI  will automatically appear in the LED window indicating when it is time to clean the air 

filter. The 

"

EI

" 

program is a (built-in) time device that operates based on total (air conditioner) running time. 

It is very important to keep the air filter clean at all times in order to maximize cooling efficiency (See Cleaning 
Air Filter). The air filter must be cleaned when the 

"

EI

" 

message from the LED display, the air conditioner 

must be switched off and disconnected (unplugged) from the power supply and re-connected. This action 
automatically resets  the 

"

EI

"

 program internal time device.

" "

In the event of a power failure, the  EI  program is automatically re-set, therefore we suggest you remove and 
clean the filter before re-starting the unit after any power failure.

" "

LONIZER FEATURE:
Ionizer function is activated when the compressor is in operation and is cancelled when the 
compressor is out of the operation.The Ionizer can generate abundant anions to fill the room with 
refreshing and natural air.