Mitsubishi Electric PKA-A12HA Manuale utente

SERVICE MANUAL

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

SPLIT-TYPE, AIR CONDITIONERS

NOTE:

• This manual describes

only service data of the

indoor units.

• RoHS compliant products

have <G> mark on the

spec name plate.

CONTENTS

1. REFERENCE MANUAL...................................2

2. SAFETY PRECAUTION...................................3

3. PART NAMES AND FUNCTIONS................... 4

4. SPECIFICATIONS............................................7

5. NOISE CRITERION CURVES..........................8

6. OUTLINES AND DIMENSIONS.......................9

7. WIRING DIAGRAM.........................................10

8. REFRIGERANT SYSTEM DIAGRAM............11

9. TROUBLESHOOTING....................................12

10. SPECIAL FUNCTION.....................................27

11. DISASSEMBLY PROCEDURE.......................30

Indoor unit

[Model names] [Service Ref.]

PARTS CATALOG (OCB456)

No. OCH456

March 2009

INDOOR UNIT

PKA-A12HA

PKA-A18HA

PKA-A12HAL

PKA-A18HAL

ON/OFF

TEMP.

COOL

DRY

AUTO

FAN

HEAT

3 3 2 2 3

WIRED REMOTE

CONTROLLER WIRELESS REMOTE

CONTROLLER

1REFERENCE MANUAL

1-1. OUTDOOR UNIT SERVICE MANUAL

Service Ref. Service Manual No.

PUZ-A18/24/36NHA3

PUZ-A18/24/36NHA3-BS

PUY-A12/18/24/36NHA3

PUY-A12/18/24/36NHA3-BS

OCH458

OCB458

PUZ-HA36NHA2 OCH426

OCB426

1-2. TECHNICAL DATA BOOK

Series (Outdoor unit) Data Book No.

PUZ-A·NHA3(-BS)

PUY-A·NHA3(-BS) OCS14

PUZ-HA·NHA2 OCS15

SAFETY PRECAUTION

Cautions for units utilising refrigerant R410A

2-2. CAUTIONS RELATED TO NEW REFRIGERANT

Use new refrigerant pipes.

Make sure that the inside and outside of refrige-

rant piping is clean and it has no contamination

such as sulfur hazardous for use, oxides, dirt,

shaving particles, etc.

In addition, use pipes with specified thickness.

Store the piping to be used indoors during

installation, 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 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

Contamination inside refrigerant piping can cause deterio-

ration of refrigerant oil etc.

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.

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 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 stood vertically. (Refrigerant is charged from liquid phase.)

2-1. ALWAYS OBSERVE FOR SAFETY

Before obtaining access to terminal, all supply

circuits must be disconnected.

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 on 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 Air intake

Louver Air outlet Vane

Wired remote controller

°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 46–102˚F.

The display blinks if the temperature

is less than 46˚F or 102˚F 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.

“NOT AVAILABLE” 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 1 hour,

when the airflow direction

also changes.

Wireless remote controller

ON/OFF TEMP

FAN

VANE

TEST RUN

AUTO STOP

AUTO START

min

LOUVER

MODE

CHECK

RESETSET CLOCK

MODEL

SELECT

NOT AVAILABLE

SWING

CHECK

FAN

TEST

RUN

°F

°C

AMPMSTOP

START

AMPM

COOL

DRY

AUTO

FAN

HEAT

VANE CONTROL button

Changes 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

Switches the operation mode between

COOLING/DRY/FAN/HEATING and AUTO

mode.

In case the outdoor unit is cooling only

type, the heating and auto mode are not

available.

CHECK-TEST RUN button

Performs an inspection check or test

operation. Do not use it for normal

operation.

FAN SPEED SELECT button

Changes the fan speed.

TIMER display

Displays when in timer operation or when

setting timer.

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.

Buttons used to set the “hour and minute” of

the current time and timer settings.

"h" and "min" buttons

Temperature setting display

Indicates the desired temperature setting

which is set.

display

Displays selected fan speed.

display

The vertical direction of airflow is indicated.

display

Blinks when model is selected.

display

Lights up while the signal is transmitted to

the indoor unit when the button is pressed.

display

Indicate that the unit is being checked or

test-run.

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

SPECIFICATIONS

F.L.A

m3/min(CFM)

Pa(mmAq)

mm(in.)

kg(lbs)

Service Ref.

Power supply(phase, cycle, voltage)

Max. Fuse Size

Min.Circuit Ampacity

External finish

Heat exchanger

Fan Fan(drive) %No.

Fan motor output

Fan motor

Airflow(Low-Middle-High)

External static pressure

Operation control & Thermostat

Noise level(Low-Middle-High)

Field drain pipe O.D.

Dimensions

Weight

INDOOR UNIT

PKA-A12HA, PKA-A12HAL

1 phase, 60Hz, 208/230V

White Munsell 1.0Y 9.2/0.2

Plate fin coil

Line flow fan (direct) %1

0.030

0.33

Dry: 9-10.5-12 (320-370-425)

Wet: 8-9.5-11 (290-335-380)

0(direct blow)

Remote controller & built-in

36-40-43

16(5/8)

898 (35-3/8)

249 (9-13/16)

295 (11-5/8)

13 (29)

1 phase, 60Hz, 208/230V

Plate fin coil

0(direct blow)

Remote controller & built-in

F.L.A

*/min(CFM)

Pa(mmAq)

mm(in.)

kg(lbs)

Service Ref.

Power supply(phase, cycle, voltage)

Max. Fuse Size

Min.Circuit Ampacity

External finish

Heat exchanger

Fan Fan(drive) %No.

Fan motor output

Fan motor

Airflow(Low-Middle-High)

External static pressure

Operation control & Thermostat

Noise level(Low-Middle-High)

Field drain pipe O.D.

Dimensions

Weight

INDOOR UNIT

PKA-A18HA, PKA-A18HAL

White Munsell 1.0Y 9.2/0.2

0.030

0.33

Dry: 9-10.5-12 (320-370-425)

Wet: 8-9.5-11 (290-335-380)

36-40-43

16(5/8)

898 (35-3/8)

249 (9-13/16)

295 (11-5/8)

13 (29)

Line flow fan (direct) %1

5NOISE CRITERION CURVES

63 125 250 500 1000 2000 4000 8000

APPROXIMATE

THRESHOLD OF

HEARING FOR

CONTINUOUS

NOISE

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCTAVE BAND SOUND PRESSURE LEVEL, dB (0dB=0.0002 μbar)

BAND CENTER FREQUENCIES, Hz

PKA-A12HA

PKA-A18HA

PKA-A12HAL

PKA-A18HAL

High

NOTCH

Low

SPL(dB)

LINE

UNIT

WALL

3.3ft

MICROPHONE

OUTLINES AND DIMENSIONS

PKA-A12HA PKA-A12HAL PKA-A18HA PKA-A18HAL Unit: inch (mm)

1/2F (

12.7)

1/4F (

6.35)

Refrigerant

Piping

Drain hose

Gas pipe

Liquid pipe

:2-1/2~:3-1/8

(:65~:80)

:2-1/2~:3-1/8

(:65~:80)

Through hole

Sleeve

(purchased locally)

Center measurement hole :3/32(

2.5)

5/32(3.8)

2-1/4(58)

Wall hole

for

left rear

piping

Knock out hole for

left rear piping

2-3/4×12-3/16(70×310)

Wall hole for

right rear piping

77-

3/16(

5.1)

Tap p in g

screw hole

5/16(

Bolt hole Mount board

Indoor unit outline

5/8(16)

9-15/16(253.5)

9-1/8(232.5)

1-1/16(28.5)

1-9/16(41)

3-1/16(78.5)

4-1/16(103.5)

4-9/16(116)

6-1/2(166)

7(178.5)

8(203.5)

3-9/16(91)

13/16(21.8)

9-1/16(231.5)

10-3/4(273.2)

1-1/4(32.7)

2-9/16(66)

2-1/16(53.5)

5(128.5)

6(153.5)

3/4(20)

9/16(15)

14-5/8(372.3)

14(356.3)

12-7/8(237.5)

11-7/16(291.5)

10-3/8(265)

9-5/16(238)

8-13/16(225)

7-13/16(200)

4-7/8(125)

2-3/4(70)

9/16(15)

14-5/8(372.3)

14(356.3)

12-7/8(327.5)

10-3/8(265)

11-7/16(291.5)

7-13/16(200)

8-13/16(225)

4-7/8(125)

2-3/4(70)

17-5/8(449)

7-9/16(193.5)

7-1/16(180.3)

6-9/16(167)

5-1/2(140)

4-1/2(115)

6-13/16(174)

8-3/8(213)

9-5/16(238)

10-15/16(278.3)

15-1/2(394)

11-1/16(281)

17-5/8(449)

Emergency operation switch

(cooling/heating)

Terminal block for

MA-remote controller

(only PKA-A·HA models)

Terminal block for power supply (option)

Front side(Grille open)

Terminal block for indoor/outdoor

connecting line

17-15/16(457)Gas pipe

21-3/16(539)Liquid pipe

6-5/8(169)

6-3/16(158)

24(610)Drain hose 7-3/16(184)

250mm,9-13/16inch or greater with

optional drain pump installation.

Required space(Indoor unit)

(mm)

Air inlet

Air outlet

Min.1-31/32(50)

Min.9-13/16(250)

Min.5-7/8(150)

Min.8-5/8

(220)

Min.1-31/32(50)

Min.1/4(7)

Knock out hole for piping

2-3/16(56)

2-11/16(69)

3/16(6)

1-11/16(43)

2-3/16(56)7/16(12.5)

1-11/16(43)

1-3/4(46)

2-5/16(60)

2-5/16(59)

1-11/16(43)

1-3/4(46)

2-3/16(56)

3/16(6)

Knock out hole

for right piping

Right side

Mount board

3/16(5)9-13/16(249)

Top side

15-3/16(387) 7-1/2(192)

7-3/4(197)

23-9/16(599)

Operation lamp DEFROST/STAND BY lamp

Receiver

Louver(manual)

Vane(auto)

Knock out hole

for lower piping

Knock out hole

for lower piping

Under side

5/16(8)

24-1/16(612)

Knock out hole

for left piping

Left side

Front side

6-1/16(155)

2-1/8

(55)

27-1/16(688)

11-5/8(295)

35-3/8(898)

5/8 (

16) O.D

WIRING DIAGRAM

PKA-A12HA PKA-A18HA PKA-A12HAL PKA-A18HAL

Symbol Name Symbol Name

I.B Indoor controller board

FUSE FUSE(T3.15AL250V)

ZNR01,02

Varistor

DSA Surge absorber

CN2L Connector (LOSSNAY)

CN30 Connector (LLC)

CN152 Connector (Back-up heating)

CN90 Connector (Remote operation adapter)

Connector (Emergency operation)

CN32 Connector ( Remote switch)

CN41 Connector (HA terminal-A)

CN51 Connector (Centrally control)

LED1 Power supply (I.B)

LED2 Power supply (R.B)

LED3 Transmission (Indoor-outdoor)

SW1 Switch (Model selection) +See table 1

SW2

SWE

Switch (Capacity code) +See table 2

[Explanation of symbols]

MS Fan motor

W.B Pcb for wireless remote controller

Switch board

SWE2 Emergency operation

M Vane motor

LED1 LED (Operation indication: Green)

REC1 Receiving unit

LED2 LED (Preparation for heating: Orange)

TB2 Terminal block(Indoor unit Power (option))

TB4 Terminal block (Indoor/outdoor connecting line)

TB5 Terminal block (Remote controller transmission line)

TH1 Room temp. Thermistor

Pipe temp. Thermistor/liquid

Cond./eva. temp. Thermistor

(32°F/15ΚΩ, 77°F/5.4ΚΩ Detect)

TH2

TH5

S.W

R.B Wired remote controller

TB6 Terminal block (Remote controller transmission line)

Notes:

1.SymboIs used in wiring diagram above are, : Connector, : Terminal (block).

2.Indoor and outdoor connecting wires have poIarities, make sure to match terminal

numbers (S1, S2, S3)for correct wirings.

3.Since the outdoor side electric wiring may change, be sure to check the outdoor unit

electric wiring diagram for servicing.

4.This diagram shows the wiring of indoor and outdoor connecting wires.(specification of

230V), adopting superimposed system for power and signal.

+1: If indoor and outdoor units have separate power supplies, refer to Fig 1.

+2: For power supply system of this unit, refer to the caution label located near this diagram.

+3: Use copper supply wires.

TO OUTDOOR

UNIT

CN01

(BLK)

ORN

YLW

BLU

RED

GRN

YLW

I.B

+1(Fig. 1)

I.B

POWER SUPPLY

208/230V 60Hz

ORN

YLW

BRN

TB4

TB2

INDOOR/OUTDOOR

COMMUNICATION

CN3C(BLU)

Refer to

tables

1and 2

CN90

(WHT)

CN2L

(RED)

CN151

(WHT)

CN20

(RED)

CN44

(WHT)

CN4F

(WHT) CN22

(BLU)

CN41

(WHT)

CN51

(WHT)

CN32

(WHT)

ZNR01

ZNR02

CNMF

(WHT)

S.W

SWE

R.B

CNP(BLU)

CN3C

(BLU)

LDSWE(A

)

(BLU)

LDSWE(B) SWE2

CN01

(BLK)

T11 DB1

FUSE

I.B

11 1 54

141425

TH1 TH2 TH5

1139

CN152

(WHT)

CN30

(BLK)

11310

DSA

○

TB4 <+3>

TB5

BLU

ORN

ORN ORN

BRN

LED1

LED3

LED2

For PKA-A.HA

TB6

OFF

OUTDOOR

UNIT

YLWYLW

BLK

SW1

(MODEL SELECTION)

SETTING

OFF

12345

SW2(CAPACITY CODE)

MODELS

A12

OFF

12345

OFF

12345

A18

W.B

CNRU

(WHT) LD101(B) REC1

LED1 LED2

6RU

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