Mitsubishi Electronics PL30FK21, PL42FK21, PL36FK31, PL18FK21, PL12FK1, PL24FK21 OC194-38

Page 38

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

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Contents Contents OC194-1Technical Change OC194-2Models Cooling capacity FeaturesOC194-3 Advanced Microprocessor ControlOC194-4 Remote controller operation buttonsPart Names and Functions Remote controller display OC194-5Models PL12FK1, PL18/24FK21 SpecificationsOC194-6 OC194-7 Models PL30FK21, PL36FK31, PL42FK21Models PL12FK1, PL18/24/30FK21, PL36FK31, PL42FK21 DataOC194-8 Performance DataOC194-9 Performance CurveOC194-10 PL24FK2 1 Cooling Capacity PL30FK2 1 Cooling CapacityOC194-11 Condensing Pressure and Suction PressureOC194-12 OC194-13 Operating Range OC194-14Standard Operation Data PL12FK OC194-15Noise Criterion Curves PL18FK21PL42FK2 OC194-16PL24FK2 PL36FK31Indoor Unit Outlines and DimensionsOC194-17 PL12FK1/ 18/24FK21OC194-18 PL30FK21/ 36FK31/ 42FK21PL12FK1 Refrigerant System DiagramOC194-19 OC194-20 Wiring DiagramModels PL12FK1 PL18FK21 PL24FK21 Wiring Diagram Models PL30FK21 PL36FK31 PL42FK21 Wiring Diagram OC194-21Main Operation Operation FLOW-CHARTOC194-22 OC194-23 Cooling OperationOC194-24 DRY OperationOC194-25 Indoor unit Orders Remote controller LCD indicatorMicroprocessor Control Outline of Microprocessor ControlIndoor Unit Control How to operateOC194-26 Compressor controlOC194-27 Drain pump control OC194-28Detecting abnormalities in the outdoor unit Drain sensorDRY operation DRY operation time chart How to operateOC194-29 OC194-30 COOL/DRY operation OC194-31Swing Auto returnOC194-32 Timer operationTimer function Test run Before test runBefore emergency operation OC194-33Emergency operation OC194-34 DIP Switch FunctionsOn remote controller board On indoor controller boardOC194-35 Indoor FAN ControlTroubles in Test RUN TroubleshootingOC194-36 For group control using one remote controller When malfunction occurs during operationCheck mode OC194-37OC194-38 Wrong Wiring on Site OC194-39OC194-40 Other Troubles and CausesOC194-41 Vane motorOC194-42 Internal surface view of the grill 12 4-WAY AIR Flow SystemOC194-43 Relatively high ceiling OC194-44Regular ceiling height High ceiling17-11/16 Examples of application Precautions OC194-45OC194-46 Fresh-Air P-V curve OC194-47Duct Pressure Ambient air flow CFMDirection discharge 11-13/16O4 directions Branch Duct installation at siteOC194-48 Direction discharge 17-11/16O2 directionsOC194-49 PL30FK21/ 36FK31 PLH42FK21Variety of System Control Functions System ControlOC194-50 PAC-SA89TA-EALL OFF SW2 Group Control by a Single Remote ControllerOC194-51 How to set SW17-7 See Figure Control Using TWO Remote ControllersRemote ON-OFF and Individual Remote Controls Remote controller LCD indicationSwitch function of remote ON-OFF switch Individual Control by Grouping the Remote ControllersBasic wiring OC194-53OC194-54 Multiple Remote Control DisplayTimer Operation or the Operation by AN External Signal Auto Restart FunctionOC194-55 Disassembly ProcedureOperating Procedure PHOTOS&ILLUSTRATIONS Indoor unit PL24FK21OC194-56 PL12FK, PL18FK2, PL24FK2 Panel Parts Parts ListOC194-57 PL12FK1, PL18FK21, PL24FK21OC194-58 PL12FK, PL18FK2, PL24FK2 Functional PartsOC194-59 PL30FK21, PL36FK31, PL42FK21 OC194-60PL30FK2, PL36FK3, PL42FK2 Functional Parts OC194-61 T7W 413 OC194-62PL30FK2, PL36FK3, PL42FK2 Panel Parts R01 K21 691OC194-63 TimerOptional Parts Names and functions PAC-SC32PTA Weekly Timer Setting DisplayOC194-64 Current Time DisplayOC194-65 Timer AdapterMultiple Remote Controller Adapter PAC-SA89TA-E ORN BRN REDDistributed in Dec . No.OC256 Specifications are subject to change without notice

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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