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

...

SPLIT-TYPE,HEAT PUMP AIR CONDITIONERS

TECHNICAL & SERVICE MANUAL

2001

No. OC248

REVISED EDITION-A

Series PMFY

Indoor unit [Model names] [Service Ref.]

PMFY-P20VBM-A PMFY-P20VBM-A

Ceiling Cassettes

R407C

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

CONTENTS

R22

• PMFY-P20VBM-A1, PMFY-P25VBM-A1, PMFY-P32VBM-A1, PMFY-P40VBM-A1 are added in Revised Edition-A.

• Please destroy OC248.

INDOOR UNIT

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

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

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

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

···12

TECHNICAL CHANGES

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.

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.

[1] Service tools

Gravimeter

Unit

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.

[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.

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

PART NAMES AND FUNCTIONS

● Indoor (Main) Unit

Horizontal Air Outlet

Auto Air Swing Vane

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

Guide vane

Air flow can be changed to horizontally by moving the Guide vane to the left or right.

Filters

Remove dust and pollutants from return air.

● Remote controller

● Operation buttons

Air intake

Returns air from room.

[PAR-20MAA]

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

● 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

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.

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.

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.

AIR DIRECTION display

This displays the air direction.

AIR SPEED display

The selected fan speed is displayed.

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 temperature is greater than 39°C.

Operation lamp

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

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

CHECK MODE

TEST RUN

display

FILTER display

CHECK display

This indicates when a malfunction

has occurred in the unit which should be checked.

SET TEMPERATURE display

This displays the selected setting

temperature.

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.

POWER display

This lamp lights when electricity is supplied to the unit.

This lamp lights when the filter need to be cleaned.

Item

·Hz

kW kW kW kW

A A

— mm mm mm

—

k/min

—

[mm(in.) [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>

SPECIFICATION

4-1. Specification

Note 1. Rating conditions

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.

Cooling: Indoor: D.B. 27°C W.B. 19.0°C Heating: Indoor: D.B. 20°C

outdoor: D.B. 35°C outdoor: D.B. 7°C W.B. 6°C

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-P20VBM-A

PMFY-P25VBM-A PMFY-P25VBM-A

PMFY-P32VBM-A PMFY-P32VBM-A

PMFY-P40VBM-A PMFY-P40VBM-A

8.7m3/min

9.3m3/min

10.7m3/min

Max 1.74m3/min Max 1.86m3/min Max 1.86m3/min Max 2.14m3/min

Air flow

(Hi)

Air capacity taken outside

Service Ref.

(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 on indoor unit board

Red

Brown

Curve in the rigth graphs.

Duct characteristics at site

E C

A D



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).

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

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

E…Static pressure of indoor unit with Qa…Estimated amount of fresh air

amount of fresh air intake dust system for air flow amount Q

air flow amount Q

intake with out D <m3/min>

/min>

<Pa>

+ 16 hidden pages