Mitsubishi PLFY-P20VCM-E(1), PLFY-P25VCM-E(1), PLFY-P32VCM-E(1), PLFY-P40VCM-E(1) Service Manual

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

TECHNICAL & SERVICE MANUAL

July 2007

No.OC314

REVISED EDITION-C

Indoor unit [Model names] [Service Ref.]

PLFY-P20VCM-E

PLFY-P20VCM-E.TH PLFY-P20VCM-E1.TH

PLFY-P25VCM-E

PLFY-P25VCM-E.TH PLFY-P25VCM-E1.TH

PLFY-P32VCM-E

PLFY-P32VCM-E.TH PLFY-P32VCM-E1.TH

PLFY-P40VCM-E

PLFY-P40VCM-E.TH PLFY-P40VCM-E1.TH

Model name indication

INDOOR UNIT

R410A

CONTENTS

1. TECHNICAL CHANGES ·························2

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

3. PART NAMES AND FUNCTIONS··········6

4. SPECIFICATIONS ···································8

5. 4-WAY AIR FLOW SYSTEM·················10

6. OUTLINES AND DIMENSIONS············12

7. WIRING DIAGRAM·······························13

REFRIGERANT SYSTEM DIAGRAM

9. DISASSEMBLY PROCEDURE·············15

10. TROUBLESHOOTING··························18

11. PARTS LIST··········································25

12. RoHS PARTS LIST·······························29

R407C

Revision :

• PLFY-P20/25/32/40VCME1.TH are added in REVISED EDITION-C.

• Some descriptions have been modified.

• Please void OC314

REVISED EDITION-B.

Note :

• RoHS compliant products have <G> mark on spec name plate. For servicing RoHS compliant products, refer to the RoHS Parts List.

R22

·····14

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.

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

If large amount of mineral oil enters, that can cause deterioration of refrigerant oil etc.

Use liquid refrigerant to charge 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.

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.

Ventilate the room if refrigerant leaks during operation. If refrigerant comes into contact with a flame, poisonous gases will be released.

TECHNICAL CHANGES

PLFY-P20VCM-E.TH ➔ PLFY-P20VCM-E1.TH PLFY-P25VCM-E.TH ➔ PLFY-P25VCM-E1.TH PLFY-P32VCM-E.TH ➔ PLFY-P32VCM-E1.TH PLFY-P40VCM-E.TH ➔ PLFY-P40VCM-E

• PANEL has been changed. SLP-2AA(White : 0.70Y 8.59/0.97) ➔ SLP-2AAW(Pure white : 6.4Y 8.9/0.4)

1.TH

SAFETY PRECAUTION

CAUTIONS RELATED TO NEW REFRIGERANT

Cautions for units utilizing refrigerant R407C

[1] Cautions for 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.

[2] Refrigerant recharging

Gravimeter

Unit

(1) Refrigerant recharging process

1Direct charging from the cylinder

·R407C cylinder which is 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 all the 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.

[3] 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

Cautions for units utilizing refrigerant R410A

Store the piping to be used during installation indoors and keep both ends of the piping sealed until just before brazing. (Leave elbow joints, etc. in their packaging.)

Use ester oil, ether oil or alkylbenzene oil (small amount) as the refrigerant oil applied to flares and flange connections.

Charge refrigerant from liquid phase of gas cylinder.

If the refrigerant is charged from gas phase, composition change may occur in refrigerant and the efficiency will be lowered.

Do not use refrigerant other than R410A.

If other refrigerant (R22 etc.) is used, chlorine in refrigerant can cause deterioration of refrigerant oil etc.

Use a vacuum pump with a reverse flow check valve.

Vacuum pump oil may flow back into refrigerant cycle and that can cause deterioration of refrigerant oil etc.

Use the following tools specifically designed for use with R410A refrigerant.

The following tools are necessary to use R410A refrigerant.

Keep the tools with care.

If dirt, dust or moisture enters into refrigerant cycle, that can cause deterioration of refrigerant oil or malfunction of compressor.

Do not use a charging cylinder.

If a charging cylinder is used, the composition of refrigerant will change and the efficiency will be lowered.

Flare tool

Electronic refrigerant charging scale

Vacuum pump adaptor

Size adjustment gauge

Gauge manifold

Torque wrench

Gas leak detector

Charge hose

Tools for R410A

If dirt, dust or moisture enters into refrigerant cycle, that can cause deterioration of refrigerant oil or malfunction of compressor.

If large amount of mineral oil enters, that can cause deterioration of refrigerant oil etc.

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.

Ventilate the room if refrigerant leaks during operation. If refrigerant comes into contact with a flame, poisonous gases will be released.

[1] Cautions for service

Gravimeter

Unit

(1) Perform service after recovering the refrigerant left in unit completely. (2) Do not release refrigerant in the air. (3) After completing service, charge the cycle with specified amount of refrigerant. (4) When performing service, install a filter drier simultaneously.

Be sure to use a filter drier for new refrigerant.

[2] Additional refrigerant charge

When charging directly from cylinder

· Check that cylinder for R410A on the market is syphon type.

· Charging should be performed with the cylinder of syphon standing vertically. (Refrigerant is charged from liquid phase.)

[3] Service tools

Use the below service tools as exclusive tools for R410A refrigerant.

No. Tool name Specifications

1 Gauge manifold ·Only for R410A

·Use the existing fitting

·Use high-tension side pressure of 5.3MPa·G or over.

2 Charge hose ·Only for R410A

·Use pressure performance of 5.09MPa·G or over.

3 Electronic scale 4 Gas leak detector ·Use the detector for R134a, R407C or R410A. 5 Adaptor for reverse flow check ·Attach on vacuum pump. 6 Refrigerant charge base 7 Refrigerant cylinder ·Only for R410A ·Top of cylinder (Pink)

·Cylinder with syphon

8 Refrigerant recovery equipment

specifications

. (UNF1/2)

PAR-21MAA

ON/OFF

FILTER

CHECK

OPERATION

CLEAR

TEST

TEMP.

BACK DAY

MONITOR/SET

CLOCK

ON/OFF

Temperature setting buttons

Down Up

Timer Menu button (Monitor/Set button)

Mode button (Return button)

Set Time buttons

Back

Ahead

Timer On/Off button (Set Day button)

Opening the lid

ON/OFF button

Fan Speed button

Filter button (<Enter> button)

Test Run button

Check button (Clear button)

Airflow Up/Down button

Louver button ( Operation button)

T o return operation number

Ventilation button ( Operation button)

To go to next operation number

Built-in temperature sensor

PART NAMES AND FUNCTIONS

● Indoor Unit

Horizontal Air Outlet Sets horizontal airflow automatically

during cooling or dehumidifying.

Filter Remove dust and pollutants

from inhaled air.

Grille

Auto Air Swing Vane Disperses airflow up and

down and adjusts the angle of airflow direction.

Air Intake Inhales air from room.

● Wired remote controller

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

● Wired remote controller

●

˚F˚C

ERROR CODE

AFTER

TIMER

TIME SUN MON TUE WED THU FRI SAT

ON OFF

Hr AFTER

FILTER

FUNCTION

ONLY1Hr.

WEEKLY

SIMPLE

AUTO OFF

Note:

“PLEASE WAIT” message This message is displayed for approximately 3 minutes when power is supplied to the indoor unit or when the unit is recovering from a power failure. “NOT A V AILABLE” message This message is displayed if an invalid button is pressed (to operate a function that the indoor unit does not have). If a single remote controller is used to operate multiple indoor units simultaneously that are different types, this message will not be displayed as far as any of the indoor units is equipped with the function.

Display Section

For purposes of this explanation, all parts of the display are shown as lit. During actual operation, only the relevant items will be lit.

Identifies the current operation

Shows the operating mode, etc. *Multilanguage display is available.

“Centrally Controlled” indicator

Indicates that operation from the remote controller has been prohibited by a master controller.

“Timer is Off” indicator

Indicates that the timer is off.

Temperature Setting

Shows the target temperature.

Day-of-Week

Shows the current day of the week.

Time/Timer Display

Shows the current time, unless the simple or Auto Off timer is set. If the simple or Auto Off timer is set, the time to be switched off is shown.

“Sensor” indication

Displayed when the remote controller sensor is used.

“Locked” indicator

Indicates that remote controller buttons have been locked.

“Clean The Filter” indicator

To be displayed on when it is time to clean the filter.

Timer indicators

The indicator comes on if the corresponding timer is set.

Up/Down Air Direction indicator

Shows the direction of the outcoming airflow.

“One Hour Only” indicator

Room Temperature display

Shows the room temperature. The room temperature display range is 8~39:. The display blinks if the temperature is less than

8: or 39:

or more.

Louver display

Indicates the action of the swing louver. Does not appear if the louver is not running.

(Power On indicator)

Indicates that the power is on.

Fan Speed indicator

Shows the selected fan speed.

Ventilation indicator

Appears when the unit is running in Ventilation mode.

Displayed if the airflow is set to low or downward during COOL or DRY mode. (Operation varies according to model.) The indicator goes off in one hour, when the airflow direction also changes.

Item

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

Field 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

PLFY-P25VCM-E(1).TH

PLFY-P32VCM-E

(1).TH

PLFY-P20VCM-E

(1).TH

PLFY-P40VCM-E

(1).TH

2.2

2.5

0.011

35-31-28 37-31-29 38-33-29 39-34-30

0.015 0.020

10-9-8

Unit : Galvanized sheets with gray heat insulation Grilles : ABS resin

Munsell<0.70Y 8.59/0.97>(PLFY-P·VCM-E.TH) / <6.4Y 8.9/0.4>(PLFY-P·VCM-E

1.TH)

208 <20> 570<650> 570<650>

Cross fin

Turbo fan ✕ 1

Polyethylene sheet

PP honey comb fabric

O.D.32 (PVC pipe VP-25 connectable)

Single phase 220-230-240V 50Hz

2.8

3.2

3.6

4.0

4.5

5.0

0.06

0.28

0.05

0.23

11-10-9

[12.7(1/2") [6.35(1/4")

17<3>15.5<3>

F a n

SPECIFICATION

SPECIFICATIONS

4-1. SPECIFICATIONS

Note 1. Rating conditions(JIS B 8616)

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

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

W 3. Airflow and the noise level are indicated as High-Medium-Low.

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:/5.4k", 30:/4.3k", 40:/3.0k"

250V 6.3A

240V 15W

(L, N, ;) Rated to 330V 30A w

(M1, M2, S) Rated to 250V 20A w

(1, 2) Rated to 250V 10A w

PLFY-P25VCM-E(1).THPLFY-P20VCM-E(1).TH PLFY-P32VCM-E(1).TH PLFY-P40VCM-E(1).TH

Thermistor (Room temperature detection)

Thermistor (Pipe temperature detection/ Liquid)

Thermistor (Pipe temperature detection/ Gas)

Fuse (Indoor controller board)

Fan motor (with Thermal fuse)

Thermal fuse

Electric heater (Condensation proof)

Power supply terminal block

Transmission terminal block

MA remote controller terminal block

6-pole OUTPUT 15W

PK6V15-LD

6-pole OUTPUT 11W

PK6V11-LF

6-pole OUTPUT 20W

PK6V20-LM

6-pole OUTPUT 20W

PK6V20-LL

MSBPC20M13

DC12V 300

/phase

PLD-12230ME-1

INPUT 12/10.8W 24R/Hr

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

DC12V Stepping motor drive, Port dimension [ 5.2 (0~2000pulse)

EDM-40YGME

OFF 145: i 2:

1.5+ ✕ 440V1.0+ ✕ 440V

Fan motor capacitor

Vane motor

Drain pump

Drain sensor

Linear expansion valve [coil]

w Note: Refer to WIRING DIAGRAM for the supplied voltage.

5 4-WAY AIR FLOW SYSTEM

Detail drawing of fresh air intake

Ceiling surface

Refrigerant pipe

Drain pipe

Electrical Box

Cut out hole

[73.4

Burring hole

3-[2.8 hole

[100

118

120

Fresh air intake

Static pressure : P [Pa]

Air flow : Q [m

/min]

-50

-100

-150

-200

-250

-300

0.5 1.0 1.5 2.0 2.5 3.0 3.5

Curve in the left graphs

Duct characteristics 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, etc.

Green

Yellow

Orange

Connector (5P)

Indoor unit side

Multiple remote controller adapter PAC-SA88HA-E

Be sure to secure insulation material by tape, etc.

Installation at site

CN51 on indoor controller board

Red

Brown

CN51

5-1. FRESH AIR INTAKE (Location for installation)

At the time of installation, use the duct holes (cut out) located at the positions shown in following diagram, as and when required.

5-2. FRESH AIR INTAKE AMOUNT & STATIC PRESSURE CHARACTERISTICS PLFY-P20VCM-E(1).TH PLFY-P25VCM-E(1).TH PLFY-P32VCM-E(1).TH PLFY-P40VCM-E(1).TH

Taking air into the unit

NOTE: Fresh air intake amount should be 20% or less of

whole air amount to prevent dew dripping.

5-3. OPERATION IN CONJUNCTION

WITH DUCT FAN (Booster fan)

• Whenever the indoor unit operates, 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 wires.

MB: Electromagnetic switch power relay for duct fan.

X: Auxiliary relay (For DC 12V, coil rating : 1.0W or

below)

How to read curves

Q…Designed amount of fresh air intake

A…Static pressure loss of fresh air

intake duct system with air flow amount Q <Pa>

B…Forced static pressure at air condi-

tioner inlet with air flow amount Q

<Pa>

C…Static pressure of booster fan with

air flow amount Q <Pa>

D…Static pressure loss increase

amount of fresh air intake duct system for air flow amount Q <Pa>

E…Static pressure of indoor unit with air

flow amount Q <Pa>

Qa…Estimated amount of fresh air

intake without D <m3/min>

+ 22 hidden pages