Mitsubishi PLFY-P20VLMD-A, PLFY-P25VLMD-A, PLFY-P32VLMD-A, PLFY-P40VLMD-A, PLFY-P50VLMD-A Service Manual

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TECHNICAL & SERVICE MANUAL

Air-Conditioners For Building Application

PLFY-P20VLMD-A,PLFY-P63VLMD-A PLFY-P25VLMD-A,PLFY-P80VLMD-A PLFY-P32VLMD-A,PLFY-P100VLMD-A PLFY-P40VLMD-A,PLFY-P125VLMD-A PLFY-P50VLMD-A

2001

Models

INDOOR UNIT

Ceiling Cassettes

Series PLFY

CONTENTS

SAFETY PRECAUTIONS·························1

1. FEATURES············································3

2. PART NAMES AND FUNCTIONS ········4

3. SPECIFICATION ···································6

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

5.WIRING DIAGRAM ·····························10

REFRIGERANT SYSTEM DIAGRAM

····11

7.TROUBLE SHOOTING ························12

8. DISASSEMBLY PROCEDURE···········17

For use with the R407C & R22

SAFETY PRECAUTIONS

- Inadequate connection and fastening may generate heat and cause a fire.

• Prepare for ty phoons and othe r str ong wi nds an d earthquak es and install the unit at the specified place.

- Improper in stal lati on may cause th e unit to to pple and re sult in

injury.

• Always use an air c leaner, humidi fie r, electric hea ter, and other accessories specified by Mitsubishi Electric.

- Ask an authorized technician to install the accessories. Improper

installati on by th e user may re sult in water leakag e, el ectric shoc k, or fire.

• Never repair the uni t. If the air con dit ion er must be rep air ed, consult the dealer.

- If the unit is repaired improperly, water leakage , electric shoc k, or

fire may result.

• Do not touch the heat exchanger fins.

- Improper handling may result in injury.

• If refrigerant gas leaks during installation work, ventilate the room.

- If the refrigerant gas comes into contact with a flame, poisonous

gases will be released.

• Install the ai r cond itio ner ac cor ding to th is In stalla tion Man ual.

- If the unit is installed improperly, water leakage , electric shoc k, or

fire may result.

• Have all electr ic w ork don e b y a lic ensed ele ctrici an accor din g to “Electric Facility Engineering Standard” and “Interior Wire Regulations”and the instructions given in this manual and always use a special circuit.

- If the power source capacity is inadequa te or elec tric work is per-

formed improperly, electric shock and fire may result.

• Securely install the cover of control box and the panel.

- If the cov er and pan el are not ins tal led pro perly,dust or w ate r may

enter the outdoor unit and fire or electric shock may result.

• When installi ng an d mo ving the air co ndit ione r to anot her si te, do not charge the it with a refrigerant differen t fr om the refr igerant (R407C or R22) specified on the unit.

- If a different refriger ant or air is mixed wit h the original refriger ant,

the refrigerant cycle may malfunction and the unit may be damaged.

• If the air conditioner is installed in a small room, measures must be take n to pr event th e re fr ig er ant co ncen tr at ion from exceeding the safety limit even if the refrigerant should leak.

- Consult the de aler rega rdin g the ap prop ria te me asures to pre-

vent the safety limit from being exceeded. Should the refrigerant leak and cause th e safety li mit to be exceed ed , haza rds du e to lack of oxygen in the room could result.

• When moving and reinstalling the air conditioner, consult the dealer or an authorized technician.

- If the air conditioner is installed improperly, water leakage, elec-

tric shock, or fire may result.

• After completing installation work, make sure that refrigerant gas is not leaking.

- If the refrigerant gas leaks and is exposed to a fan heater, stove,

oven, or other heat source, it may generate noxious gases.

• Do not re cons tr uc t or chan g e th e se ttin gs of the prote ct ion devices.

- If the pressure switch, thermal switch, or other protection device

is shorted an d op erat ed f orci bly, or parts ot her th an th ose sp ecif ied by Mitsubishi Electric are used, fire or explosion may result.

1. Befor e instal lati on and elec tric work

s Before installing the unit, make sure you read all the

“Safety precautions”.

s The “Safety precautions” provide very important

points regarding safety. Make sure you follow them.

s This equipment may not be applicable to EN61000-3-

2: 1995 and EN61000-3-3: 1995.

s This equipment may cause the adverse effect on the

same supply system.

s Please report to or take consent by the supply au-

thority before connection to the system.

Symbols used in the text

Warning:

Describes precautions that should be observed to prevent danger of injury or death to the user.

Caution:

Describes pr ecau tion s that shou ld be obse rved to pre vent dama ge to the unit.

Symbols used in the illustrations

: Indicates an action that must be avoided. : Indicates that important instructions must be followed. : Indicates a part which must be grounded. : Indicates tha t caution should be taken wit h rot ating parts. (This

symbol is displayed on the main unit label.) <Color: Yellow>

: Beware of electric shock (This sym bol is dis played on the main

unit label.) <Color: Yellow>

Warning:

Carefully read the labels affixed to the main unit.

Warning:

• Ask the dealer or an aut horized tec hnicia n to instal l the air conditioner.

- Improper installatio n b y the use r ma y result in w ater lea kage , elec -

tric shock, or fire.

• Install the air unit at a place that can withstand its weight.

- Inadequate str eng th may cause the uni t to fall down, res ult ing in

injuries.

• Use the specified cables for wiring. Make the connections securely so th at th e ou tsid e f or ce of th e ca ble is no t ap plie d to the terminals.

2. Precautions for devices that use R407C refrigerant

Caution:

• 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 refriger ant pi ping made of C122 0 (CU- DHP) phosph orus deoxidized copper as specified in the *JIS H3300 “Copper and copper alloy seam le ss pipe s and tube s” . In additi on, be sure that the inner and outer surfaces of the pipes are clean and free of hazardous sulphur, oxides, dust/dirt, shaving particles, oils, moisture, or any other contaminant.

- Contaminan ts on th e in si de of the re fr ig er an t pi pi ng may caus e

the refrigerant residual oil to deteriorate.

*JIS:Japanese Industrial Standard

• Store th e pipi ng to be us ed du ring inst alla tion indo or s 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 ester oil, ether oil or alk ylb enzene (small amo unt ) as the refrigerator oil to coat flares and flange connections.

- The refrigerat or oi l wi ll de gr ade if it is mi x ed wi th a larg e am ount of

mineral oil.

• Use liquid refrigerant to fill the system.

- If gas refrigerant is used to seal the system, the composition of

the refrigera nt in the cyli nder will chan ge and pe rfor manc e may drop.

• Do not use a refrigerant other than R407C.

- If another refrigerant (R22, etc.) is used, the chlorine in the refrig-

erant 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 cycl e and

cause the refrigerator oil to deteriorate.

• Do not use the following tools that are used with conventional refrigerants. (Gauge manifold, charge hose, gas leak detector, reverse flow check valve, refrigerant charge base, vacuum gauge, refrigerant recovery equipment)

- If the conventional refrigerant and refrigerator oil are mixed in the

R407C, the refrigerant may deteriorated.

- If water is mixed in the R407C, the ref rige rator oil may deteriorate.

- Since R407C do es no t cont ain any ch lor in e, ga s leak dete ctor s

for conventional refrigerants will not react to it.

• Do not use a charging cylinder.

- Using a charging cylind er ma y caus e the re friger ant to de terior ate.

• Be especially careful when managing the tools.

- If dust, dirt, or water gets in the refr igerant cyc le, the ref rige rant

may deteriorate.

PLFY-P20VLMD-A PLFY-P25VLMD-A PLFY-P32VLMD-A PLFY-P40VLMD-A PLFY-P50VLMD-A PLFY-P63VLMD-A PLFY-P80VLMD-A PLFY-P100VLMD-A PLFY-P125VLMD-A

2.2/ 2.5

2.8/ 3.2

3.6/ 4.0

4.5/ 5.0

5.6/ 6.3

7.1/ 8.0

9.0/ 10.0

11.2/ 12.5

14.0/ 16.0

FEATURES

Indoor unit

Ceiling Cassettes

Series PLFY

Models

Cooling capacity/Heating capacity

PAR-20MAA

ON/OFF

CENTRALLY CONTROLLED

ERROR CODE

CLOCK

ON OFF

˚C

CHECK

CHECK MODE

FILTER

TEST RUN FUNCTION

˚C

1Hr.

NOT AVAILABLE

STAND BY DEFROST

FILTER

CHECK TEST

TEMP.

TIMER SET

4 56879

1 [Room temperature adjustment] Button 2 [Timer/continuous] Button 3 [Selecting operation] Button 4 [Time selection] Button

[Time-setting] Button

5 [Louver] Button 6 [Fan speed adjustment] Button

7 [Up/down airflow direction] Button 8 [Ventilation] Button 9 [Checking/built-in] Button 0 [Test run] Button A [Filter] Button B [ON/OFF] Button C Position of built-in room temperature

•Never expose the remote controller to direct sunlight. Doing so can result in the erroneous measurement of room temperature.

•Never place any obstacle around the lower right-hand section of the remote controller.Doing so can result in the erroneous measurement of room temperature.

PART NAMES AND FUNCTIONS

● Indoor (Main) Unit

● Remote controller

● Operation buttons

[PAR-20MAA]

●Once the controls are set, the same operation mode can be repeated by simply pressing the ON/OFF button.

Air inlet

Sucks the ambient air in.

Long-life filter

Removes the sucked-in dust and dir t. Since the long-life filter is used as an air filter, it should be cleaned at the beginning of air-cooling and heating seasons. (During seasons with large amounts of dust and dirt, more frequent cleaning are recommended.)

Autovane

Disperses the airflow up and down and adjusts the angle of the airflow.

● Display

(A) Current time/Timer (B) Centralized control (C) Timer ON (D) Abnormality occurs (E) Operation mode: COOL, DRY, AUTO, FAN, HEAT (F) Preparing for Heating mode (G) Defrost mode (H) Set temperature (I) Power ON (J) Louver (K) Not available function (L) Ventilation (M) Function setting mode (N) Test run mode (O) Error check mode (P) Filter sign (Q) Set effective for 1 hr. (R) Sensor position (S) Room temperature (T) Airflow (U) Fan speed

ABCD

SQTU

STAND BY DEFROST

CENTRALLY CONTROLLED

CHECK

˚C

ON OFF

CLOCK

ERROR CODE

TEMP.

HIKLJ

1Hr.

NOT AVAILABLE

˚C

ON/OFF

FILTER

CHECK MODE

TEST RUN FUNCTION

R P

O N M

SPECIFICATION

3-1. Specification

Note: 1.Cooling / Heating capacity indicates the maximum value at operation under the following condition.

Cooling :Indoor 27¡CDB/19¡CWB Heating :Indoor 20¡C

:Outdoor 35¡CDB :Outdoor 7¡CDB/6¡CWB

2.The figure in

< >

indicates panel´s

Item

Power source

Cooling capacity Heating capacity

Power consumption

Current

External finish (Munsel No.)

Dimension

Net weight

Heat exchanger

Fan

Motor

Air filter

Refrigerant

pipe dimension

Drain pipe dimension

Noise level

(Low-Middle2-Middle1-High)

Model

Voltage

Frequency

Cooling

Heating Cooling Heating

Height

Width Depth

Type

Airflow rate

(Low-Middle2-Middle1-High)

External static pressure

Type

Output

Gas(Flare)

Liquid(Flare)

Hz kW kW kW kW

A A

mm mm mm

m3/min

mm mm

dB(A)

PLFY-P20

VLMD-A

2.2

2.5

PLFY-P25

VLMD-A

2.8

3.2

0.09

0.08

0.43

0.38

Unit: Galvanized steel plate Panel: 0.70Y8.59/0.97

768<1,060>

24<7>

Cross fin( Alminium plate fin and copper tube)

Sirocco fanX1

6.0-6.5-7.3-8.0

Single phase induction motor

0.033 0.075

Synthetic fiber unwoven cloth filter( long life)

PLFY-P32

VLMD-A 220-240

3.6

4.0

0.10

0.09

0.48

0.43

338<8>

606<670>

25<7>

6.5-7.0-7.8-8.5

ø12.7 ø6.35

VP-25

PLFY-P40

VLMD-A

4.5

5.0

1,008<1,300>

33.5<8> 35<8>

Sirocco fanX2

9.0-10.5-11.5-12.5 10.0-11.0-12.0-13.0

29-32-34-36 32-34-36-3829-31-34-3628-30-33-35

PLFY-P50

0.16

0.15

0.77

0.71

VLMD-A

5.6

6.3

ø15.88

ø9.52

Note:1 Note:1

Note:2 Note:2 Note:2 Note:2

Item

Power source

Cooling capacity Heating capacity

Power consumption

Current

External finish (Munsel No.)

Dimension

Net weight

Heat exchanger

Fan

Motor

Refrigerant

pipe dimension

Drain pipe dimension

Noise level

(Low-Middle2-Middle1-High)

External static pressure

Air filter

(Low-Middle2-Middle1-High)

Voltage

Frequency

Cooling Heating Cooling Heating

Height

Width Depth

Type

Airflow rate

Type

Output

Gas(Flare)

Liquid(Flare)

Model

PLFY-P63

VLMD-A

Hz kW kW kW kW

A A

mm mm mm

m3/min

mm mm

dB(A)

7.1

8.0

0.22

0.21

1.05

1.00

Unit: Galvanized steel plate Panel: 0.70Y8.59/0.97

1,358<1,650>

39<10> 41<10>

Cross fin( Alminium plate fin and copper tube)

Sirocco fanX2

13.0-14.0-16.0-18.0 15.0-17.0-19.0-21.0

Synthetic fiber unwoven cloth filter( long life)

ø15.88 ø19.05

32-34-37-39 36-38-41-43 37-39-41-43 40-42-44-46

PLFY-P80

VLMD-A

10.0

0.23

0.22

1.10

1.05

Single phase induction motor

0.078

220-240

9.0

338<8>

606<670>

ø9.52

VP-25

PLFY-P100

VLMD-A

11.2

12.5

0.25

0.24

1.20

1.15

1,708<2,000>

56<11.5>

Sirocco fanX4

21.0-23.0-26.0-29.0

0.078

PLFY-P125

VLMD-A

14.0

16.0

0.28

0.27

1.35

1.33

24.0-27.0-30.0-33.0

Note:1 Note:1

Note:2 Note:2 Note:2 Note:2

5.0µF

X440V

4.0µF

X440V

6.0µF

X440V

5.0µFX440V

LEV

C1 2.5µFX440V

MF1,2

PLFY-P20 PLFY-P25 PLFY-P32 PLFY-P40 PLFY-P50 PLFY-P63 PLFY-P80 PLFY-P100 PLFY-P125

VLMD-A VLMD-A VLMD-A VLMD-A VLMD-A VLMD-A VLMD-A VLMD-A VLMD-A

3-2. Electrical par ts specifications

Model

Parts

name

Tranrsformer T (Primary) 50/60Hz 220-240V (Secondry) (18.4V 1.7A)

TH21 Resistance 0˚C/15kW,10˚C/9.6kW˚C/6.3kW,25˚C/5.4kW,30˚C/4.3kW,40˚C/3.0kW

TH22 Resistance 0˚C/15kW,10˚C/9.6kW,20˚C/6.3kW,25˚C/5.4kW,30˚C/4.3kW,40˚C/3.0kW

Gas pipe thermistor

FUSE 250V 6.3A

Drain sensor DS

TB2 (L,N, ) 330V 30A

TB5

(1,2),(M1,M2,S) 300V 10A

TB15

Fuse

(Indoor con-

troller board)

Power supply terminal bed

Transmission

terminal bed

OFF 130˚C±5˚C

ON 90˚C±20˚C

MULB49Z

2.5/2W 4.99/5.99R.P.M

PJV-0720

INPUT 8/7.5W 24R/Hr

Heater resistance 82W

/25˚C

Thermistor resistance 0˚C/15kW,10˚C/9.6kW,20˚C/6.3kW,25˚C/5.4kW,30˚C/4.3kW,40˚C/3.0kW

Room temperature thermistor

Fan motor

(with Inner-

thermostat)

DC12V Stepping motor drive

port dimension 5.2W(0~2000pulse)

EDM-804MD

4-pole OUTPUT 33W

D094P35MW

4-pole Output 78W

D104P95MW

4-pole Output 75W

D104P85MW

Symbol

DC12V Stepping motor drive port

dimension 3.2W (0~2000pulse)

EDM-402MD

TH23 Resistance 0˚C/15kW,10˚C/9.6kW,20˚C/6.3kW,25˚C/5.4kW,30˚C/4.3kW,40˚C/3.0kW

Innerthermostat

(Fan motor)

Liquid pipe thermistor

Fan motor capacitor

Drain-up mechanism

Linear expansion valve

Vane motor

(with limit

switch)

OUTLINES AND DIMENSIONS

Indoor Unit PLFY-P20·25·32·40·50·63·80VLMD-A

Unit :

45˚

90˚

224

90˚

172

Branch duct ø200 knock out hole (both side)

45 3 18

(Ceiling opening)

(Lifting bolt pitch)

4-ø2.9Mounting hole

(Ceiling opening)

(Lifting bolt pitch)

<flare>

Model Gas pipe :LP ø 12.7 ··············

20·25·32·40

Liquid pipe :HP ø 6.35 ··············

Model Gas pipe :LP ø15.88 ··············

50·63·80

Liquid pipe :HP ø 9.52 ··············

Drain hose VP-25<flexible joint> (accessory) ········

Note:1.Use M10 screw for the lifing bolt (field supply).

20 630 20

111

222

Fresh air intake ø150 knock out hole

476

606

550

300mm or less

600mmMAX

Terminal bed(Transmission)

Terminal bed(Power source)

178 70

630

4040

102102

670

122

122 D

606

550

Water filling port

17870

476

135

106

Standard center panel

145

192

235

Drain hole

70 350

222

181

303

90˚

Control box

Terminal box

Air filter

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