10 MICROPROCESSOR CONTROL

1.OUTLINE OF MICROPROCESSOR CONTROL

INPUT to remote controller

Remote controller board

Processes and transmits

OUTPUT to remote controller

OFF-ON switching.

COOL/DRY-FAN selector switching.

Thermostat setting.

TIMER mode selector-switching and Timer setting.

HIGH-LOW fan speed switching.

AUTO Vane selector (AIR DISCHARGE) switching.

TEST RUN switching.

CHECK mode switching.

(Self diagnostic trouble shooting)

Indoor unit

orders.

Remote controller

 

 

LCD indicator

 

 

 

SWING

 

 

TIMER OFF TIMER￿

CLOCK AUTO AUTO￿

FAN￿

 

 

CHECK SET TEMP.

START STOP

FILTER

 

SPEEDAUTO￿

 

 

 

RETURN

CHECK MODE

TEST RUN

 

Non-polar, two-wire cable

12VDC

maximum length 550 yards

Signal

 

INPUT from indoor unit

Room temperature thermistor (TH1)

Pipe temperature thermistor (TH2)

OUTPUT to indoor unit

Indoor controller board

Receives orders from remote controller and tem- perature data from indoor unit.

Processes orders and data.

Controls indoor and outdoor operation.

Self diagnostic function.

wSystem control operation.

wEmergency operation.

wSet by dip switch on indoor controller board. Transmits the power to remote controller.

1 2

Auto vane’s angle setting.

Emergency stop.

Independent Control of

Outdoor Unit

Compressor protection device working

Fan speed control.

Crankcase heater control ON-OFF.

Self diagnostic function

Polar two-wire cable

Outdoor unit

12VDC

1

2

OUTPUT to outdoor unit

Compressor and outdoor fan : ON-

OFF

OC194-25

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Mitsubishi Electronics PL36FK31, PL42FK21, PL30FK21, PL18FK21 OC194-25, Outline of Microprocessor Control, Outdoor unit

PL18FK21, PL30FK21, PL12FK1, PL36FK31, PL24FK21 specifications

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The PL42FK21 is designed to deliver superior cooling and heating performance, making it suitable for larger spaces. With its high energy efficiency rating, it minimizes energy consumption while providing optimal comfort. This model is equipped with advanced inverter technology that regulates the compressor speed, ensuring the desired temperature is maintained without unnecessary fluctuations in power usage.

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