Mitsubishi PMFY-P20VBM-A, PMFY-P20VBM-A1, PMFY-P25VBM-A, PMFY-P25VBM-A1, PMFY-P32VBM-A Service Manual

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TECHNICAL & SERVICE MANUAL

SPLIT-TYPE,HEAT PUMP AIR CONDITIONERS

Indoor unit

[Model names] [Service Ref.]

PMFY-P20VBM-A PMFY-P20VBM-A

PMFY-P20VBM-A

PMFY-P25VBM-A PMFY-P25VBM-A

PMFY-P25VBM-A

PMFY-P32VBM-A PMFY-P32VBM-A

PMFY-P32VBM-A

PMFY-P40VBM-A PMFY-P40VBM-A

PMFY-P40VBM-A

No. OC248

REVISED EDITION-A

INDOOR UNIT

Ceiling Cassettes

Series PMFY

CONTENTS

1. TECHNICAL CHANGE·························2

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

3. PART NAMES AND FUNCTIONS········4

4. SPECIFICATION···································6

5. OUTLINES AND DIMENSIONS··········10

6. WIRING DIAGRAM·····························11

REFRIGERANT SYSTEM DIAGRAM

···12

8. TROUBLE SHOOTING ·······················13

9. DISASSEMBLY PROCEDURE ···········19

10. PARTS LIST········································22

R407C

2001

R22

• PMFY-P20VBM-A1,

PMFY-P25VBM-A1,

PMFY-P32VBM-A1,

PMFY-P40VBM-A1

are added in

Revised Edition-A.

• Please destroy OC248.

TECHNICAL CHANGES

SAFETY PRECAUTION

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

· Do not use the existing refrigerant piping.

-The old refrigerant and lubricant in the existing piping contains a large amount of chlorine which may cause the lubricant

deterioration of the new unit.

· 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 lubricant will result.

· Store the piping to be used during installation indoors with keep both ends 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 lubricant 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 lubricant deterioration.

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

-The vacuum pump oil may flow back into the refrigerant cycle and cause the lubricant deterioration.

PMFY-P20VBM-A PMFY-P20VBM-A1

PMFY-P25VBM-A PMFY-P25VBM-A1

PMFY-P32VBM-A PMFY-P32VBM-A1

PMFY-P40VBM-A PMFY-P40VBM-A1

● INDOOR CONTROLLER BOARD(I.B) has changed.

● DRAIN PAN has changed.

[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 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.

[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.

Gravimeter

Unit

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.

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

Press this button to switch the cooler,

electronic dry (dehumidify), automatic

and heater modes.

OPERATION SWITCH button

This sets the room temperature. The

temperature setting can be performed

in 1: units

Setting range

Cooler 19: to 30:

Heater 17: to 28:

TEMP. ADJUSTMENT button

This switches between continuous

operation and the timer operation.

TIMER button

This switches between the operation

and stop modes each time it is pressed.

The lamp on this button lights during

operation.

ON/OFF button

Only press this button to perform an

inspection check or test operation.

Do not use it for normal operation.

CHECK-TEST RUN button

This switch the horizontal fan motion

ON and OFF.

(Not available for this model.)

LOUVER button

This adjusts the vertical angle of the

ventilation.

AIR DIRECTION button

This resets the filter service indication

display

FILTER button

This sets the current time, start time

and stop time.

TIME SETTING button

This sets the ventilation fan speed.

AIR SPEED button

Guide vane

Air flow can be changed to horizontally

by moving the Guide vane to the left or right.

Air intake

Returns air from room.

Filters

Remove dust and pollutants

from return air.

Auto Air Swing Vane

Disperses airflow up and

down and adjusts the angle

of airflow direction.

Horizontal Air Outlet

Caution

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

● When the central control remote control unit, which is sold separately, is used the ON-OFF button, operation switch button

and TEMP. adjustment button do not operate.

● “NOT AVAILABLE” is displayed when the Air speed 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 “H0” is displayed on the room temperature indication (For max.

2minutes). Please wait until this “H0” indication disappear then start the operation.

CENTRALLY

CONTROLLED display

This indicates when the unit is con-

trolled 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

The [STANDBY] symbol is only

displayed from the time the heating

operation starts unit the heated air

begins to blow.

DEFROST display

This indicates when the defrost oper-

ation is performed.

CHECK display

This indicates when a malfunction

has occurred in the unit which should

be checked.

CLOCK display

The current time , start time and stop

time can be displayed in ten second

intervals by pressing the time switch

button. The start time or stop time is

always displayed during the timer

operation.

● Display

In this display example on the bot-

tom left, a condition where all dis-

play lamps light is shown for expla-

nation purposes although this differs

from actual operation.

Operation lamp

This lamp lights during operation,

goes off when the unit stops and

flashes when a malfunction occurs.

POWER display

This lamp lights when electricity is

supplied to the unit.

SET TEMPERATURE display

This displays the selected setting

temperature.

AIR DIRECTION display

This displays the air direction.

ROOM TEMPERATURE display

The temperature of the suction air

is displayed during operation. The

display range is 8°C to 39°C. The

display flashes 8°C when the actual

temperature is less than 8°C and

flashes 39°C when the actual tem-

perature is greater than 39°C.

display

This display lights in the check mode

or when a test operation is per-

formed.

CHECK MODE

TEST RUN

This lamp lights when the filter need

to be cleaned.

AIR SPEED display

The selected fan speed is displayed.

FILTER display

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

SPECIFICATION

4-1. Specification

Note 1. Rating conditions

Cooling: Indoor: D.B. 27°C W.B. 19.0°C

outdoor: D.B. 35°C

Heating: Indoor: D.B. 20°C

outdoor: D.B. 7°C W.B. 6°C

Note 2. The number indicated in < > is just for the grille.

W 3. Air flow and the noise level are indicated as High-Middium 1-Middium 2-Low.

Item

·Hz

—

k/min

—

[mm(in.)

[mm

Cooling capacity

Power

Heat exchanger

Insulator

Air filter

Fan ✕ No

Air flow W3

Pipe

dimensions

Unit drain pipe size

Noise level W3

Product weight

Exterior

(munsell symbol)

Fan motor

output

External

static pressure

Liquid

side

Gas

side

Heating capacity

Dimensions

Height

Width

Depth

Electric characteristic

Input

Cooling

Heating

Cooling

Heating

Current

PMFY-P20VBM-A

PMFY-P25VBM-A

PMFY-P32VBM-A

PMFY-P40VBM-A

Single phase 220V-230V-240V 50Hz / 220V 60Hz

2.2

2.5

0.042

0.20

2.8

3.2

0.044

0.21

3.6

4.0

0.044

0.21

4.5

5.0

0.054

0.26

9.3-8.6-8.0-7.3

37-36-34-32

8.7-8.0-7.2-6.5

35-33-30-27

10.7-9.7-8.7-7.7

39-37-35-33

Unit : Galvanized sheets · Standard grills : ABS resin acrylic coating Munsell<0.98Y 8.99/0.63>

230<30>

812<1,000>

395<470>

Cross fin

Line flow fan ✕ 1

0.028

Polyethylene sheet

PP honey comb fabric

12.7(1/2")

6.35(1/4")

I.D.26 (PVC pipe VP-20 connectable)

14<3.0>

4-2. Electrical parts specifications

Parts name

Model

Symbol

TH21

TH22

TH23

FUSE

LEV

TB2

TB5

TB15

Resistance 0:/15k", 10:/9.6k", 20:/6.3k", 25:/5.2k", 30:/4.3k", 40:/3.0k"

250V 6.3A

Thermistor resistance 0:/6k", 10:/3.9k", 20:/2.6k", 25:/2.2k", 30:/1.8k", 40:/1.3k"

(L, N, ;) 330V 30A

(M1, M2, S) 250V 20A

(1,2) 250V 10A

Liquid pipe thermistor

Gas pipe thermistor

Drain-up mechanism

Drain sensor

Linear expansion valve

PMFY-P20VBM-A

PMFY-P25VBM-A

PMFY-P32VBM-A

PMFY-P40VBM-A

Room temperature

thermistor

Fuse

(Indoor controller board)

Fan motor

Vane motor

Power supply

terminal block

Transmission

terminal block

DC Brushless Motor

8-pole OUTPUT 28W

PN0H28-MA

MSFJC 20M23

12V/380

PJV-1046

220-240V 50/60Hz

DC12V Stepping motor drive port

(0~2000pulse)

EDM-402ME

MA-remote controller

terminal block

4-3. Air capacity taken from outside

50.0

-50.0

-100.0

0.0 0.5 1.0

Air flow (m

/min)

2 intakes

1 intake

Characteristic diagram of air capacity taken from outside of PMFY-P·VBM

Static pressure (Pa)

1.5 2.0 2.5

0.0

PMFY-P20VBM-A

PMFY-P25VBM-A

PMFY-P32VBM-A

PMFY-P40VBM-A

8.7m

/min

9.3m

/min

9.3m

/min

10.7m

/min

Max 1.74m

/min

Max 1.86m

/min

Max 1.86m

/min

Max 2.14m

/min

Air flow

(Hi)

Air capacity taken outside

Service Ref.

PMFY-P·VBM-A series are possible to be taken air from outside.

When taking air from the outside, the duct fan can be used to.

The air capacity should be 20% or less of the air flow SPEC(Hi).

Q…Planned amount of fresh air intake

A…Static pressure loss of fresh air

intake duct system with air flow

amount Q

B…Forced static pressure at air condi-

tioner inlet with air flow amount Q

C…Static pressure of booster fan with

air flow amount Q

D…Static pressure loss increase

amount of fresh air intake dust

system for air flow amount Q

<Pa>

E…Static pressure of indoor unit with

air flow amount Q

Qa…Estimated amount of fresh air

intake with out D <m

/min>

<Pa>

(Knock out)

4-{2.8

Fresh air intake hole

(Knock out)

Fresh air intake hole

90-

{

122

{

100

108

250 288.5

Installation at site

CN51

Multiple remote

controller adapter

PAC-SA88HA-E

Indoor controller board

Distance between indoor

controller board and relay

must be within 10m.

Be sure to secure insulation

material by tape and such

Green

Yellow

Orange

Connector (5P)

Package side

Multiple remote

controller adapter

PAC-SA88HA-E

Be sure to secure insulation

material by tape and such

CN51

indoor unit

board

Red

Brown

Curve in the

rigth graphs.

Duct characteristics

at site

E C

A D



Interlocking operation method with duct fan

(Booster fan)

●Whenever the indoor unit is operating, the duct fun also

operates.

(1)Connect the optional multiple remote controller

adapter(PAC-SA88HA-E)to the connector CN51 on the

indoor controller board.

(2)Drive the relay after connecting the 12V DC relay

between the Yellow and Orange connector lines.

(w)Use a relay under 1W.

MB: Electromagnetic switch power relay for duct fan.

X: Auxiliary relay (12V DC LY-1F)

How to read curves

+ 16 hidden pages