Check

Diagnosis of malfunction

 

Cause

 

 

Check points

 

code

 

 

 

 

 

 

 

 

 

 

 

E0

Signal transmitting/receiving

During individual unit control

1)

Check the transmission wire.

 

 

error

1) Bad contact of transmission

2)

Check with another remote controller. If “E0” is

 

 

(Indoor controller does not

 

wire

 

still indicated, replace the indoor controller

 

 

respond to remote controller

2) Signal transmitting/receiving cir-

 

board.

 

 

 

signal.)

 

cuit is abnormal.

 

If other check code appears. replace the origi-

 

 

 

 

 

 

nal remote controller.

 

 

 

 

 

 

 

 

P1

Abnormality of room temper-

1)

Bad contact of thermistor

1)

Check the thermistor.

 

 

ature thermistor (RT1)

2)

Damaged thermistor

2) Measure the resistance of the thermistor.

 

 

 

 

 

 

Normal resistance should be as follows.

 

 

 

 

 

 

32°F····15k'

86°F ····4.'3k

 

 

 

 

 

 

50°F····9.'6k 104°F ····3.'0k

 

 

 

 

 

 

68°F····6.'3k

 

 

P2

Abnormality of indoor coil

 

 

 

 

 

 

 

 

If the resistance is normal, replace the indoor

 

 

thermistor (RT2)

 

 

 

 

 

 

 

 

controller board.

 

 

 

 

 

 

 

 

 

 

 

 

 

P3

Signal transmission error

1) Bad contact of transmission

1)

Check the transmission wire.

 

 

(Remote controller does not

 

wire

2)

Check with another remote controller.

 

 

respond to indoor controller

2) Signal transmitting/receiving cir-

 

If “P3” is still indicated, replace the indoor

 

 

signal.)

 

cuit is abnormal.

 

board.

 

 

 

 

3) Wrong operation due to noise

 

If other check code appears, replace the origi-

 

 

 

 

wave emitted by other appli-

 

nal remote controller.

 

 

 

 

ances

3)

Short-circuit between 1 and 2 of CN40 and

 

 

 

 

 

 

attach CN40 to the following units.

 

 

 

 

 

 

● Second unit in twin control

 

 

 

 

 

 

● Second and third units in triple control

 

 

 

 

 

 

● Sub units in group control

 

 

 

 

 

 

 

P4

Abnormality of drain sensor

1) Bad contact of transmission

1)

Check the connector.

 

 

 

 

wire

2)

Measure the resistance of the thermistor 1 - 3.

 

 

 

2)

Damaged thermistor

 

32°F ··6k'

59°F····3.'2k 86°F····1.'8k

 

 

 

 

 

 

41°F ··4.8k'

68°F····2.'6k 95°F····1.'5k

 

 

 

 

 

 

50°F ··3.9k'

77°F····2.'2k 104°F··1.3k'

 

 

 

 

 

If the resistance is normal, replace the indoor

 

 

 

 

 

controller board.

 

 

 

 

 

 

 

 

P5

Malfunction of drain pump

1)

Malfunction of drain pump

1) Check the drain pump.

 

 

 

2)

Damaged drain sensor

2) ● Check the drain sensor.

 

 

 

 

 

 

(Check the drop of water is on.)

 

 

 

 

 

If the resistance is normal, replace the indoor

 

 

 

 

 

controller board.

 

 

 

 

 

 

 

 

 

P6

Freezing protection/

1)

Short cycle of air cycle

1)

Clear obstructions from the air cycle.

 

 

overheating protection

2)

Dirty air filter

2)

Clean the air filter

 

 

is working.

3)

Damaged fan

3)

Check the fan.

 

 

 

 

4)

Abnormal refrigerant

4)

Check the refrigerant temperature.

 

 

 

 

 

 

 

 

P7

System error

1)

Wrong address-setting

1)

Check the address-setting.

 

 

 

2) Signal transmitting/receiving cir-

2) Check with another remote controller. If check

 

 

 

 

cuit of remote controller is

 

code other than “P7” appears, replace the origi

-

 

 

 

abnormal.

 

nal remote controller.

 

 

 

3)

Wrong SW6-setting

3)

Check SW6 setting.

 

 

 

 

 

 

 

P8

Abnormality in outdoor unit

1) Wrong wiring of indoor/outdoor

1)

Check the indoor/outdoor connecting wire.

 

 

 

 

connecting wire

2)

Change the connection of electric wiring.

 

 

 

2)

Reversed phase

3)

Check the protection device.

 

 

 

3)

Protection device is working

4)

Measure the resistance of the outdoor coil ther-

 

 

 

4) Damaged outdoor coil thermis-

 

mistor. If the resistance is normal, replace the

 

 

 

 

tor

 

outdoor controller board.

 

 

 

 

 

 

 

 

 

OC194-38

Page 37 Page 39
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Image 38
Mitsubishi Electronics PL30FK21, PL42FK21, PL36FK31, PL18FK21, PL12FK1, PL24FK21 specifications OC194-38
Page 37 Page 39

PL18FK21, PL30FK21, PL12FK1, PL36FK31, PL24FK21 specifications

Mitsubishi Electronics has long been recognized for its commitment to quality and innovation in the field of air conditioning systems. Among its impressive lineup, the models PL42FK21, PL24FK21, PL36FK31, PL12FK1, and PL30FK21 stand out for their advanced features, efficiency, and user-friendly designs.

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.

Next, the PL24FK21 offers similar efficiencies while accommodating medium-sized spaces. This model incorporates a streamlined design that blends with any interior, while its quiet operation ensures that it does not disrupt daily activities. Moreover, the model features a programmable timer and remote control, enhancing user convenience and comfort.

The PL36FK31 is another model that brings forth powerful performance, ideal for commercial applications or larger residential installations. It boasts superior airflow distribution, ensuring even cooling or heating throughout the desired area. The addition of a high-performance filter system helps to purify the air, making it a healthy option for families and workplaces alike.

For those seeking a compact solution, the PL12FK1 is a standout choice. This model excels in efficiency while maintaining a small footprint, making it perfect for apartments or smaller rooms. With its energy-saving capabilities and modern design, this unit combines functionality and style seamlessly.

Finally, the PL30FK21 balances performance with affordability. This model comes with a host of features, including an eco-friendly refrigerant that minimizes environmental impact. It also incorporates smart controls that enable users to manage their settings via mobile apps, adding a level of modern convenience that many consumers desire.

Each of these Mitsubishi models is built with durability in mind, ensuring they can withstand the rigors of daily use. Additionally, Mitsubishi Electronics provides exceptional customer support and warranty options, reflecting their commitment to customer satisfaction.

In summary, the PL42FK21, PL24FK21, PL36FK31, PL12FK1, and PL30FK21 from Mitsubishi Electronics exemplify the brand's dedication to innovation, efficiency, and user-friendliness in air conditioning technology. These models cater to a variety of spaces and user needs, making them a reliable choice for both residential and commercial applications.
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