Mitsubishi PKFY-P32VGM, PKFY-P40VGM, PKFY-P50VGM Service Manual

TECHNICAL & SERVICE MANUAL

SPLIT-TYPE,HEAT PUMP AIR CONDITIONERS

CONTENTS

1. SAFETY PRECAUTION ·····························2

2. PART NAMES AND FUNCTIONS ·············4

3. SPECIFICATIONS······································6

4. OUTLINES AND DIMENSIONS ·················8

5. WIRING DIAGRAM ····································9

6. REFRIGERANT SYSTEM DIAGRAM······10

7. TROUBLE SHOOTING ····························11

8. DISASSEMBLY PROCEDURE················16

9. PARTS LIST·············································19

PKFY-P32VGM PKFY-P40VGM PKFY-P50VGM

No. OC179

1998

[ Model names ]

Wall Mounted

Series PKFY

Indoor unit

R407C/R22

[ Service Ref. ]

PKFY-P32VGM PKFY-P40VGM PKFY-P50VGM

SAFETY PRECAUTION

Cautions for using with the outdoor unit which adopts R407C refrigerant.

· Do not use the existing refrigerant piping.

-The old refrigerant and refrigerator oil in the existing piping contains a large amount of chlorine which may cause the refrigerator oil of the new unit to deteriorate.

· Use “low residual oil piping”.

-If there is a large amount of residual oil (hydraulic oil, etc.) inside the piping and joints, deterioration of the refrigerator oil will result.

· Store the piping to be used during installation indoors and keep both ends of the piping sealed until just before brazing. (Store elbows and other joints in a plastic bag.)

-If dust, dirt, or water enters the refrigerant cycle, deterioration of the oil and compressor trouble may result.

· Use ESTR , ETHER or HAB as the refrigerator oil to coat flares and flange connection parts.

Use liquid refrigerant to seal the system.

-If gas refrigerant is used to seal the system, the composition of the refrigerant in the cylinder will change and performance

may drop.

· Do not use a refrigerant other than R407C.

-If another refrigerant (R22, etc.) is used, the chlorine in the refrigerant may cause the refrigerator oil to deteriorate.

· Use a vacuum pump with a reverse flow check valve.

-The vacuum pump oil may flow back into the refrigerant cycle and cause the refrigerator oil to deteriorate.

[3] Refrigerant recharging

(1) Refrigerant recharging process

1Direct charging from the cylinder.

·R407C cylinder are available on the market has a syphon pipe.

·Leave the syphon pipe cylinder standing and recharge it. (By liquid refrigerant)

(2) Recharge in refrigerant leakage case

·After recovering the all refrigerant in the unit, proceed to working.

·Do not release the refrigerant in the air.

·After completing the repair service, recharge the cycle with the specified amount of liquid refrigerant.

Gravimeter

Unit

[1] Service tools

Use the below service tools as exclusive tools for R407C refrigerant.

No. Tool name Specifications

1 Gauge manifold ·Only for R407C.

·Use the existing fitting SPECIFICATIONS. (UNF7/16)

·Use high-tension side pressure of 3.43MPa·G or over.

2 Charge hose ·Only for R407C.

·Use pressure performance of 5.10MPa·G or over.

3 Electronic scale 4 Gas leak detector ·Use the detector for R134a or R407C. 5 Adapter for reverse flow check. ·Attach on vacuum pump. 6 Refrigerant charge base. 7 Refrigerant cylinder. ·For R407C ·Top of cylinder (Brown)

·Cylinder with syphon

8 Refrigerant recovery equipment.

[2] Notice on repair service

·After recovering the all refrigerant in the unit, proceed to working.

·Do not release refrigerant in the air.

·After completing the repair service, recharge the cycle with the specified amount of liquid refrigerant.

PART NAMES AND FUNCTIIONS

● Indoor Unit

PKFY-P32VGM PKFY-P40VGM PKFY-P50VGM

● Remote controller [PAR-F25MA]

● Once the controls are set, the same operation mode can be repeated by simply pressiry the on / off button.

TIMER button

This switches between continuous

operation and the timer operation

AIR SPEED button

The sets the ventilation fan speed.

● Operation buttons

TIME SETTING button

This sets or switches the current time, start time and stop time.

OPERATION SWITCH button

Press this button to switch the cooler electronic dry (denumidity), automatic and heater modes.

TEMP ADJUSTMENT button

This sets the room temperature. The temperature setting can be performed in 1°C units.

Setting range :

Cooler 19°C to 30°C Heater 17°C to 28°C

CHECK-TEST RUN button

Only press this button to perform an inspection check or test operation. Do not use it for nomal operation

FILTER button

This resets the filter service indication display

AIR DIRECTION button

This adjusts the vertical angle of the

ventilation.

ON/OFF button

This switches between the operation

and stop modes each time it is pressed. The lamp on this button lights during operation.

The model name of the remote controller is indicated.

LOUVER button

This switches the horizontal fan motion ON and OFF.

(This button does not operate in this model.)

Air intake

Air intake gril

Filter

Air outlet

Guide vane

Auto vane

Caution

● Only the Power display lights when the unit is stopped and power supplied to the unit.

● When power is turned ON for the first time the (CENTRAL CTRL) display appears to go off momentarily but this is not a

malfunction.

● When the central control remote control unit, which is sold separately, is used the ON-OFF button, Operation switch button and i TEMP button do not operate.

● “NOT AVAILABLE” is displayed when the Air speed button and the Louver button are pressed.This indicates that this room unit is not equipped with the fan direction adjustment function and the louver function.

● When power is turned ON for the first time, it is normal that “ HO ” is displayed on the room temperature indication (For max. 2 minutes).Please wait until this “ HO ” indication disapear then start the operation.

CENTRALLY CONTROLLED display

This indicates when the unit is

controlled by optional features such as central control type remote controller.

TIMER display

This indicates when the continuous operation and time operation modes are set. It also display the time for the timer operation at the same time as when it is set.

OPERATION MODE display

This indicates the operation mode.

STANDBY display

This indicates when the standby

mode is set from the time the sleep operation starts until the heating air is discharged.

DEFROST display

This indicates when the defrost

operation is performed.

CHECK display

This indicates when a malfunction

has occurred in the unit which should be checked.

POWER display

This display lights when the filter need to be cleaned.

SET TEMPERATURE display

This displays the selected setting

temperature.

CLOCK display

The current time , start time and stop

time can be displayed in tensecond intervals by pressing the time switch button. The start time or stop time is always displayed during the timer operation.

FAN SPEED display

The selected fan speed is displayed.

● Display

In this display example on the bottom left, a condition where all display lamps light is shown for explanation purposes although this differs from actual operation.

display

This display lights in the check mode or when a test operation is performed.

CHECK MODE

TEST RUN

ROOM TEMPERATURE display

The temperature of the suction air is displayed during operation. The display range is 8° to 39°C. The display flashes 8°C when the actual temperature is less than 8° and flashes 39°C when the actual temperature is greater than 39°C.

Operation lamp

This lamp lights during operation, goes off when the unit stops and flashes when amalfunction occurs.

SPECIFICATIONS

3-1 Specification

12 - 11 - 10 - 9

15.88 <5/8">

9.52 <3/8">

43 - 40 - 37 - 34

Power

consumption

Current

Type ✕ No.

Air flow w2

External stafic pressure

Fan motor output

Item

Power source

Cooling capacity

Heating capacity

Exterior <munsell symbol>

Dimensions

Heat exchanger

Fan

Air filter

Refrigerant

Pipe dimensions

Drain pipe dimension

Noise level w2

Product weight

Unit

V · Hz

kcal/h

—

k/min

—

[mm

dB (A)

Cooling

Heating

Cooling

Heating

Height

Width

Depth

Gas side

Liquid side

PKFY-P32VGM

3150

3550

PKFY-P40VGM

4000

4500

Single phase 220-240V 50Hz

0.07

0.32

Plastic , white : <0.70Y 8.59/0.97>

340

990

235

Cross fin(Aluminum plate fin and copper tube)

Lineflow fan ✕ 1

0.03

PP Honey comb

Outer dimeter 20 <PVC pipe VP-20 connectable>

Electric

characteristic

PKFY-P50VGM

5000

5600

11.5 - 10.5 - 9.5 - 8

12.7 <1/2">

6.35 <1/4">

41 - 38 - 36 - 33

Note : w1. Rating conditions

Cooling : Indoor 27°C DB. 19.5°C WB

Outdoor 35°C DB. 24°C WB

Heating : Indoor 21°C DB.

Outdoor 7°C DB. 6°C WB

W2. Air flow and the noise level are indicated as High - Middium1 - Middium2 - Low .

3-2 Electrical parts specifications

Transformer

Room temperature thermistor

Liquid pipe thermistor

Gas pipe thermistor

Fuse (Indoor controller board)

Fan motor (with inner-thermostat)

Fan motor capacitor

Vane motor

Linear expansion valve

Power supply terminal block

Transmission terminal block

Symbol

TH21

TH22

TH23

FUSE

LEV

TB2

TB5

PKFY-P32VGM

PKFY-P40VGM

(Primary) 50/60Hz 220 - 240V (Secondary) 18.4V 1.7A

Resistance

0$C/15k1, 10$C/9.6k1, 20$C/6.3k1, 25$C/5.4k1, 30$C/4.3k1, 40$C/3.0k1

250V 6.3A

PM4V30-K 220-240V/220V , 50/60Hz

4 pole Output 30W

OFF 125(5;

2.0+F 440V

MP 35 EA DC12V

DC12V Stepping motor drive

Port dimension [3.2 (0 ~ 2000pulse)

(L, N, ;) 330V 30A

(M1, M2, S) 250V 20A

Model

Parts name

PKFY-P50VGM

Inner-thermostat

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