Mitsubishi PKFY-P20VAM-E, PKFY-P25VAM-E Service Manual

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

TECHNICAL & SERVICE MANUAL

July 2006

No. OC309

REVISED EDITION-A

Series PKFY

Indoor unit [Model names] [Service Ref.]

PKFY-P20VAM-E PKFY-P20VAM-E PKFY-P25VAM-E PKFY-P25VAM-E

Wall Mounted

R410A

CONTENTS

R407C

R22

Revision:

•

RoHS PARTS LIST

• Some descriptions have been modified.

• Please void OC309.

Note:

• This manual describes only service data of the indoor units.

• RoHS compliant products have <G> mark on the spec name plate.

• For servicing of RoHS compliant products, refer to the RoHS Parts List.

is added.

INDOOR UNIT

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

2. PART NAMES AND FUNCTIONS······6

3. SPECIFICATION·································8

4. OUTLINES AND DIMENSIONS········10

5. WIRING DIAGRAM···························11

6. REFRIGERANT SYSTEM DIAGRAM···12

7. TROUBLESHOOTING······················12

8. DISASSEMBLY PROCEDURE ·········19

9. PARTS LIST······································22

10. RoHS PARTS LIST ···························25

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 enter, that can cause deterioration of refrigerant oil etc.

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.

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.

Gravimeter

Unit

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

(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 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.

[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 enter 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 enter into refrigerant cycle, that can cause deterioration of refrigerant oil or malfunction of compressor.

If large amount of mineral oil enter, 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 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.)

[3] Service tools

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

No. 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)

8 Refrigerant recovery equipment

specifications

Cylinder with syphon

. (UNF1/2)

PAR-21MAA

ON/OFF

FILTER

CHECK

OPERATION

CLEAR

TEST

TEMP.

BACK DAY

MONITOR/SET

CLOCK

ON/OFF

Set Temperature 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 door.

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 preceding operation number.

Ventilation button (

Operation button)

To next operation number.

PART NAMES AND FUNCTIONS

● Indoor Unit PKFY-P20VAM-E

PKFY-P25VAM-E

Filter

Air intake grille

Air intake

Auto Vane

Guide vane

Air Outlet

● Wired remote controller

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

● Operation buttons

● Display

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

˚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

Identifies the current operation

Shows the operating mode, etc. * Multilanguage display is sup-

ported.

“Centrally Controlled” indicator

Indicates that operation of 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, shows the time remaining.

“Sensor” indication

Displayed when the remote controller sensor is used.

“Locked” indicator

Indicates that remote controller buttons have been locked.

“Clean The Filter” indicator

Comes 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

The indicator shows the direction of the outcoming airflow.

“One Hour Only” indicator

Displayed if the airflow is set to weak and downward during COOL or DRY mode. (Operation varies according to model.) The indicator goes off after one hour, at which time the airflow direction also changes.

Room Temperature display

Shows the room temperature.

Louver display

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

(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.

Caution

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

● If you press a button for a feature that is not installed at the indoor unit, the remote controller will display the “Not Available”

message. If you are using the remote controller to drive multiple indoor units, this message will appear only if he feature is not present at the parent unit.

● When power is turned ON for the first time, it is normal that “PLEASE WAIT” is displayed on the room temperature indication (For max. 2minutes). Please wait until this “PLEASE WAIT” indication disappear then start the operation.

Power Supply

Starting Current

Fan ✕ No. Air flow w 2 External static pressure Fan motor output

Item Power Cooling capacity Heating capacity

Exterior <munsell symbol> Out dimensions

Heat exchanger

Fan

Insulator Air filter

Pipe dimensions

Unit drain pipe size Noise level w 2 Product weight

Unit

[,V,Hz

kW kW kW kW

A A

— mm mm mm

—

K/min

—

[mm(in.) [mm(in.)

[mm

Cooling Heating Cooling Heating

Height Width Depth

Gas side Liquid side

PKFY-P20VAM-E

2.2

2.5

PKFY-P25VAM-E

2.8

3.2

0.04

0.20

Plastic munsell : <2.60Y 8.66/0.69>

295 815 158

Cross fin

Lineflow fan ✕ 1

5.9-5.6-5.2-4.9 0

0.017

Polyethylene sheet

PP honey comb

12.7 (1/2")

6.35 (1/4")

PVC pipe VP-16 connectable (I.D. 16)

36-35-33-32

8.5

Electric

characteristic

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

SPECIFICATION

3-1. SPECIFICATION

Note 1. Rating conditions (JIS B 8615-1)

Cooling :Indoor D.B. 27°C W.B. 19°C Heating : Indoor D.B. 20°C

2. Air flow and the noise level are indicated as High – Middium1 – Middium2 – Low.

Outdoor D.B. 35°C Outdoor D.B. 7°C W.B. 6°C

3-2. 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

1.5µF ✕ 440V

MSFBC20A76 DC12V

(L, N, ;) 250V 20A

(M1, M2) 250V 10A

Liquid pipe thermistor

Gas pipe thermistor

Fan motor capacitor

Linear expansion valve

PKFY-P20VAM-E PKFY-P25VAM-E

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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