Mitsubishi Electric PKFY-P15VBM-E Manuale operativo

TECHNICAL & SERVICE MANUAL

CONTENTS

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

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

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

4. SPECIFICATION.....................................9

5. OUTLINES AND DIMENSIONS............11

6. WIRING DIAGRAM...............................12

7. REFRIGERANT SYSTEM DIAGRAM........14

8. TROUBLESHOOTING..........................14

9. DISASSEMBLY PROCEDURE.............21

Indoor unit

[Model names] [Service Ref.]

PKFY-P15VBM-E PKFY-P15VBM-E

PKFY-P20VBM-E PKFY-P20VBM-E

PKFY-P20VBM-ER1

PKFY-P25VBM-E PKFY-P25VBM-E

PKFY-P25VBM-ER1

No. OCH418

REVISED EDITION-A

INDOOR UNIT

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

R407C R22R410A

Note:

•This manual describes only

service data of the indoor

units.

•RoHS compliant products

have <G> mark on the spec

name plate.

November 2008

Model name

indication PARTS CATALOG (OCB418)

Revision:

•PKFY-P15VBM-E and PKFY-

P20/25VBM-ER1 are added

in REVISED EDITION-A.

•Some descriptions have

been modified.

•Plase void OCH418.

1TECHNICAL CHANGES

[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.

Cautions for units utilizing refrigerant R407C

CAUTIONS RELATED TO NEW REFRIGERANT

Do not use the existing refrigerant piping.

The old refrigerant and lubricant in the existing piping

contain 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 indoors during

installation and 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.

2SAFETY PRECAUTION

PKFY-P20VBM-E PKFY-P20VBM-ER1

PKFY-P25VBM-E PKFY-P25VBM-ER1

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

[3] Service tools

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

[2] Refrigerant recharging

(1) Refrigerant recharging process

1Direct charging from the cylinder.

·R407C cylinder 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

No. Tool name Specifications

Gauge manifold ·Only for R407C

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

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

Charge hose ·Only for R407C

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

—

Electronic scale

Gas leak detector ·Use the detector for R134a or R407C.

Adapter for reverse flow check ·Attach to vacuum pump.

—

Refrigerant charge base

Refrigerant cylinder ·For R407C ·Top of cylinder (Brown)

·Cylinder with syphon

Refrigerant recovery equipment

Cautions for units utilizing refrigerant R410A

Store the piping to be used indoors during

installation and 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 refrige-

rant 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.

Handle tools with care.

If dirt, dust or moisture enters into refrigerant cycle, that can

cause deterioration of refrigerant oil or malfunction of com-

pressor.

Do not use a charging cylinder.

If a charging cylinder is used, the composition of refrigera-

nt 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 com-

pressor.

If large amount of mineral oil enters, that can cause deterio-

ration 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

(1) Perform service after collecting 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 stood vertically. (Refrigerant is charged from liquid phase.)

Gravimeter

Unit

[3] Service tools

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

No. Tool name Specifications

1Gauge manifold ·Only for R410A

·Use the existing fitting specifications. (UNF1/2)

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

2Charge hose ·Only for R410A

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

3Electronic scale

4Gas leak detector ·Use the detector for R134a, R407C or R410A.

5Adaptor for reverse flow check ·Attach to vacuum pump.

6Refrigerant charge base

7Refrigerant cylinder ·Only for R410A ·Top of cylinder (Pink)

·Cylinder with syphon

8Refrigerant recovery equipment

3PART NAMES AND FUNCTIONS

Indoor unit

Filter

Grille

Louver

Air outlet

Air intake

Vane

°F°C

ERROR CODE

AFTER

TIMER

TIME SUN MON TUE WED THU FRI SAT

OFF

AFTER

FILTER

FUNCTION

ONLY1Hr.

WEEKLY

SIMPLE

AUTO OFF

PAR-21MAA

ON/OFF

FILTER

CHECK

OPERATION

CLEAR

TEST

TEMP.

BACK DAY

MONITOR/SET

CLOCK

ON/OFF

●

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 prohib-

ited 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 but-

tons 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 corre-

sponding timer is set.

Up/Down Air Direction indica-

tor

The indicator shows the direc-

tion 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.

Operation Section

Temperature setting buttons

Down

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)

To return operation

number

Ventilation button

( Operation button)

To go to next operation

number

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.

“NOTAVAILABLE” 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.

Built-in temperature sensor

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,

at which time the airflow direction

also changes.

Wired remote controller

Wireless remote controller

ON/OFF TEMP

FAN

VANE

TEST RUN

AUTO STOP

AUTO START

min

LOUVER

MODE

CHECK

RESETSET CLOCK

MODEL SELECT

NOTAVAILABLE

CHECK

TEST RUN

°C

AMPM

VANE CONTROL button

Used to change the air flow direction.

CLOCK button

RESET button

SET button

ON/OFF button

The unit is turned ON and OFF alternately

each time the button is pressed.

LOUVER button

Changes left/right airflow direction.

(Not available for this model.)

MODE SELECT button

Used to switch the operation mode between

cooling, drying, fan, heating and auto mode.

CHECK-TEST RUN button

Only press this button to perform an

inspection check or test operation.

Do not use it for normal operation.

FAN SPEED SELECT button

Used to change the fan speed.

TIMER display

Displays when in timer operation or when

setting timer.

button

SET TEMPERATURE button sets any desired

room temperature.

CLOCK display

Displays the current time.

“ ” “ ” display

Displays the order of timer operation.

“ ” “ ” display

Displays whether timer is on or off.

+In case the outdoor unit is cool only type,

the heating and auto mode are not

available.

Buttons used to set the “hour and minute” of

the current time and timer settings.

h and min buttons

display

FAN SPEED display indicates which fan

speed has been selected.

display

The vertical direction of air flow is indicated.

display

Blinks when model is selected.

display

CHECK and TEST RUN display indicate that

the unit is being checked or test-run.

display

OPERATION MODE display

Operation mode display indicates which

operation mode is in effect.

TIMER CONTROL buttons

AUTO STOP (OFF timer): when this switch is

set, the air conditioner will be automatically

stopped at the preset time.

AUTO START (ON timer): when this switch is

set, the air conditioner will be automatically

started at the preset time.

MODEL SELECT

CHECK

TEST RUN

SET TEMP. display indicates the set desired

temperature.

Lights up while the signal is transmitted to

the indoor unit when the button is pressed.

*1 Nominal cooling conditions

Note : Indoor :

Outdoor :

Pipe length :

Level difference :

27°CDB/19°CWB (81°FDB/66°FWB)

35°CDB (95°FDB)

7.5 m (24-9/16 ft)

0m (0 ft)

*2 Nominal cooling conditions

27°CDB/19.5°CWB (81°FDB/67°FWB)

35°CDB (95°FDB)

5m (16-3/8 ft)

0m (0 ft)

*3 Nominal heating conditions Unit converter

20°CDB (68°FDB)

7°CDB/6°CWB (45°FDB/43°FWB)

7.5 m (24-9/16 ft)

0 m (0 ft)

* Due to continuing improvement, above specification may be subject to change without notice.

* Nominal conditions *1, *3 are subject to JIS B8615-1.

kcal/h = kW × 860

Btu/h = kW × 3,412

cfm = m3/min × 35.31

lb = kg/0.4536

*Above specification data is

subject to rounding variation.

Model

Power source

Cooling capacity

(Nominal)

Heating capacity

(Nominal )

External finish

External dimension H x W x D

Net weight

Heat exchanger

Fan

Noise level (Low-Mid2-Mid1-High)

(measured in anechoic room)

Insulation material

Air filter

Protection device

Refrigerant control device

Connectable outdoor unit

Diameter of

refrigerant pipe

Field drain pipe size

Standard

attachment

Remark

Power input

Current input

Power input

Current input

Type x Quantity

External

static press.

Motor type

Motor output

Driving mechanism

Airflow rate

(Low-Mid2-Mid1-High)

Liquid

Gas

Document

Accessory

Optional parts

External LEV Box

Installation

kcal/h

Btu/h

kcal/h

Btu/h

in.

kg (lb)

mmH2O

m3/min

L/s

cfm

dB <A>

mm (in.)

(R410A)

(R22, R407C)

(R410A)

(R22, R407C)

Installation Manual, Instruction Book

1-phase 220-240V 50Hz, 1-phase 220V 60Hz

Cross fin (Aluminum fin and copper tube)

1-phase induction motor

Direct-driven by motor

Polyethylene sheet

PP honeycomb

Fuse

LEV

R410A, R407C, R22 CITY MULTI

PKFY-P20VBM-E(R1)

Plastic, MUNSELL (1.0Y 9.2/0.2)

2.2

1,900

7,500

2,000

0.04

0.20

2.5

2,200

8,500

0.04

0.20

295 × 815 × 225

11-5/8"

32-1/8"

8-7/8"

10 (23)

Line flow fan × 1

0.017

4.9 - 5.2 - 5.6 - 5.9

82 - 87 - 93 - 98

173 - 184 - 198 - 208

29 - 31 - 34 - 36

PKFY-P25VBM-E(R1)

2.8

2,400

9,600

2,500

0.04

0.20

3.2

2,800

10,900

0.04

0.20

295 × 815 × 225

11-5/8"

32-1/8"

8-7/8"

10 (23)

Line flow fan × 1

0.017

4.9 - 5.2 - 5.6 - 5.9

82 - 87 - 93 - 98

173 - 184 - 198 - 208

29 - 31 - 34 - 36

I.D. 16mm (5/8")

PAC-SG95LE-E

I.D. 16mm (5/8")

PAC-SG95LE-E

ø6.35 (ø1/4")

ø12.7 (ø1/2")

Flare

ø6.35 (ø1/4")

ø12.7 (ø1/2")

Flare

PKFY-P15VBM-E

1.7

1,450

5,800

1,500

0.04

0.20

1.9

1,600

6,500

0.04

0.20

295 × 815 × 225

11-5/8"

32-1/8"

8-7/8"

10 (23)

Line flow fan × 1

0.017

4.9 - 5.0 - 5.2 - 5.3

82 - 83 - 87 - 88

173 - 177 - 184 - 187

29 - 31 - 32 - 33

I.D. 16mm (5/8")

PAC-SG95LE-E

ø6.35 (ø1/4")

ø12.7 (ø1/2")

Flare

Details on foundation work, duct work, insulation work, electrical wiring, power source switch, and other items shall be referred to

the Installation Manual.

4SPECIFICATION

4-1. SPECIFICATIONS

4-2. ELECTRICAL PARTS SPECIFICATIONS

Parts name

Model Symbol

TH21

TH22

TH23

FUSE

LEV

TB2

TB5

Resistance 0/15k, 10/9.6k, 20/6.3k, 25/5.4k, 30/4.3k, 40/3.0k

250V 6.3A

4-Pole Output 17W / PS4V17-KB

1.5× 440V

MSFBC20 DC12V

(L, N, ) 250V 20A

(M1, M2) 250V 10A

Liquid pipe thermistor

Gas pipe thermistor

Fan motor capacitor

Linear expansion valve

PKFY-P20VBM-E(R1) PKFY-P25VBM-E(R1)

Room temperature

thermistor

Fuse

(Indoor controller board)

Fan motor

(with thermal fuse)

Vane motor

(with limit switch)

Power supply terminal

block

Transmission terminal

block

DC12V Stepping motor drive

Port :3.2 (0~2000pulse)

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