Mitsubishi Electronics PKA-A24KA-TH, PKA-A30KA-TH, PKA-A30KAL-TH, PKA-A36KA-TH, PKA-A24KAL-TH User Manual

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

SPLIT-TYPE, AIR CONDITIONERS

March 2009

No. OCH457

SERVICE MANUAL

Indoor unit

[Model names] [Service Ref.]

PKA-A24KA

PKA-A30KA

PKA-A36KA

PKA-A24KAL

PKA-A30KAL

PKA-A36KAL

PKA-A24KA.TH PKA-A30KA.TH PKA-A36KA.TH PKA-A24KAL.TH PKA-A30KAL.TH PKA-A36KAL.TH

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
		...................................			3
	2. SAFETY PRECAUTION
	3. PART NAMES AND FUNCTIONS...................				4
	............................................				7
	4. SPECIFICATIONS	..........................
					8
	5. NOISE CRITERION CURVES		.......................
INDOOR UNIT					9
	6. OUTLINES AND DIMENSIONS
	7. WIRING DIAGRAM.........................................			10
			............
				11
	8. REFRIGERANT SYSTEM DIAGRAM
AUTO	9. TROUBLESHOOTING			12
COOL
DRY		.........................................................................
HEAT
FAN	10. SPECIAL FUNCTION			26
			.......................
	11. DISASSEMBLY PROCEDURE			29

TEMP.

ON/OFF

PARTS CATALOG (OCB457)

WIRED REMOTE
CONTROLLER	WIRELESS REMOTE
	CONTROLLER	3 3 2 2 3

1 REFERENCE MANUAL

1-1. OUTDOOR UNIT SERVICE MANUAL

Service Ref.

PUZ-A24/30/36NHA3 PUZ-A24/30/36NHA3-BS PUY-A24/30/36NHA3 PUY-A24/30/36NHA3-BS

PUZ-HA30/36NHA2

Service Manual No.

OCH458

OCB458

OCH426

OCB426

1-2. TECHNICAL DATA BOOK

	Series (Outdoor unit)	Data Book No.
	PUZ-A·NHA3(-BS)	OCS14
	PUY-A·NHA3(-BS)
	PUZ-HA·NHA2	OCS15

2

2 SAFETY PRECAUTION

2-1. ALWAYS OBSERVE FOR SAFETY

Before obtaining access to terminal, all supply circuits must be disconnected.

2-2. CAUTIONS RELATED TO NEW REFRIGERANT

Cautions for units utilising refrigerant R410A

Use new refrigerant pipes.

Make sure that the inside and outside of refrigerant 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.

Contamination inside refrigerant piping can cause deterioration of refrigerant oil etc.

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.)

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

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

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

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.

	Tools for R410A
Gauge manifold		Flare tool
Charge hose		Size adjustment gauge
Gas leak detector		Vacuum pump adaptor
Torque wrench		Electronic refrigerant
		charging scale

Handle 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.

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.)

3

Unit

Gravimeter

[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 specifications. (UNF1/2)
		· 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

3 PART NAMES AND FUNCTIONS
Indoor unit	Front grille
Filter
Air inlet
	Emergency operation
	switch
Air outlet
Louver
Vane

4

Wired remote controller

Display Section

Day-of-Week

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.

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.

TIME SUN MON TUE WED THU FRI SAT
TIMER	Hr	ON
AFTER	AFTER	OFF
ERROR CODE		FUNCTION
°F°C		FILTER
°F°C
		WEEKLY
ONLY1Hr.		SIMPLE
		AUTO OFF

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 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.

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.

“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.

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
Up
Timer Menu button
(Monitor/Set button)
Mode button (Return button)
		TEMP.
Set Time buttons
Back		MENU	ON/OFF
Ahead	BACK	MONITOR/SET	DAY
Timer On/Off button	PAR-21MAA	CLOCK
(Set Day button)
Opening the
lid

	ON/OFF
	FILTER
	CHECK	TEST
OPERATION	CLEAR

Built-in temperature sensor

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.

5

Wireless remote controller

OPERATION MODE display

OPERATION MODE display

Indicates which operation mode is in effect.

display

The vertical direction of airflow is indicated.

display

Displays selected fan speed.

ON/OFF button

The unit is turned ON and OFF alternately each time the button is pressed.

FAN SPEED SELECT button

Changes the fan speed.

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.

VANE CONTROL button

Changes the air flow direction.

CHECK TESTRUN display

Indicate that the unit is being checked or test-run.

MODELSELECT display

Blinks when model is selected.

	COOL CHECK	TEST	°F
	MODEL	RUN
			°C
	DRY SELECT		STOP AMPM
	AUTO FAN	SWING
	FAN		START AMPM
	HEAT NOT AVAILABLE

ON/OFF TEMP

	FAN	AUTO STOP
MODE	VANE	AUTO START
CHECK	LOUVER	h
TEST RUN		min
SET	RESET CLOCK

display

Lights up while the signal is transmitted to the indoor unit when the button is pressed.

Temperature setting display

Indicates the desired temperature setting which is set.

CLOCK display

Displays the current time.

TIMER display

Displays when in timer operation or when setting timer.

“ ” “ ” display

Displays the order of timer operation.

“” “” display

Displays whether timer is on or off.

button

Sets any desired room temperature.

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.

"h" and "min" buttons

Buttons used to set the “hour and minute” of the current time and timer settings.

LOUVER button

Changes left / right airflow direction.

(Not available for this model.)

CLOCK button

RESET button

SET button

6

4 SPECIFICATIONS

INDOOR UNIT

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 I.D.

Dimensions W

D

H

Weight

A

A

kW

F.L.A m3/min(CFM)

Pa(mmAq)

dB mm(in.) mm(in.) mm(in.) mm(in.) kg(lbs)

INDOOR UNIT

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 I.D.

Dimensions W D H

Weight

A

A

kW

F.L.A

*/min(CFM)

Pa(mmAq)

dB mm(in.) mm(in.) mm(in.) mm(in.) kg(lbs)

INDOOR UNIT

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 I.D.

Dimensions W

D

H

Weight

A

A

kW F.L.A

m3/min(CFM)

Pa(mmAq)

dB mm(in.) mm(in.) mm(in.) mm(in.) kg(lbs)

PKA-A24KA.TH, PKA-A24KAL.TH

1 phase, 60Hz, 208/230V

15

1

White Munsell 1.0Y 9.2/0.2 Plate fin coil

Line flow fan (direct) % 1

0.056

0.36

Dry: 18-20-22 (635-705-775) Wet: 16-18-20 (570-635-700)

0(direct blow) Remote controller & built-in

39-42-45 16(5/8)

1170 (46-1/16)

295 (11-5/8)

365 (14-3/8)

21 (46)

PKA-A30KA.TH, PKA-A30KAL.TH

1 phase, 60Hz, 208/230V

15

1

White Munsell 1.0Y 9.2/0.2 Plate fin coil

Line flow fan (direct) % 1 0.056

0.36

Dry: 18-20-22 (635-705-775) Wet: 16-18-20 (570-635-700)

0(direct blow) Remote controller & built-in

39-42-45

16(5/8) 1170 (46-1/16)

295 (11-5/8)

365 (14-3/8)

21 (46)

PKA-A36KA.TH, PKA-A36KAL.TH

1 phase, 60Hz, 208/230V

15

1

White Munsell 1.0Y 9.2/0.2 Plate fin coil

Line flow fan (direct) % 1

0.056

0.57

Dry: 20-23-26 (705-810-920)

Wet: 18-21-23 (635-730-830)

0(direct blow) Remote controller & built-in

43-46-49

16(5/8)

1170 (46-1/16)

295 (11-5/8)

365 (14-3/8)

21 (46)

7

5 NOISE CRITERION CURVES

PKA-A24KA.TH
	NOTCH	SPL(dB)	LINE
PKA-A30KA.TH	High	45
	Low	39
PKA-A24KAL.TH
PKA-A30KAL.TH

	90
μbar)	80
dB(0dB=0.0002	70								NC-70
	60
LEVEL,
									NC-60
PRESSURE	50
									NC-50
	40
SOUND
									NC-40
BAND	30
									NC-30
OCTAVE	20	APPROXIMATE
		THRESHOLD OF
		HEARING FOR							NC-20
		CONTINUOUS
		NOISE
	10	63	125	250	500	1000	2000	4000	8000

BAND CENTER FREQUENCIES, Hz

PKA-A36KA.TH						NOTCH	SPL(dB)		LINE
PKA-A36KAL.TH						High		49
						Low		43
	90
)
μbar	80
0.0002	70
dB (0dB=									NC-70
	60
LEVEL,
									NC-60
PRESSURE	50
									NC-50
BAND SOUND	40
									NC-40
	30								NC-30
OCTAVE
	20	APPROXIMATE
		THRESHOLD OF
		HEARING FOR							NC-20
		CONTINUOUS
	10	NOISE
		63	125	250	500	1000	2000	4000	8000

BAND CENTER FREQUENCIES, Hz

UNIT

WALL

3.3ft

3.3ft

MICROPHONE

8

6 OUTLINES AND DIMENSIONS

PKA-A24KA.TH PKA-A30KA.TH PKA-A36KA.TH PKA-A24KAL.TH PKA-A30KAL.TH PKA-A36KAL.TH

Unit: inch (mm)

5-17/132(140.3) 2-9/16(65.2)

7/16(11)

	Top side
16-11/16(423.7)	17(431.7)

Knock out hole for left piping

2-3/32(53) 1-1/4(32) 23/32(18)

Min.9/32(7)

Left side	Front side	Right side
		Mount board
	14-3/8(365)	C

2-29/32(74)	33-21/32(855)	9-1/2(241)	11-5/8(295)	3/16(5)
A	46-1/16(1170)		Operation lamp
	Front side(Grille open)			Knock out hole
				for right piping

DEFROST/STAND BY lamp

Receiver

				Terminal block for Outdoor unit
				Terminal block for power supply (option)
				Terminal block for
				MA-remote controller (only PKA-A·KA models)
		Filter hook		Emergency operation switch
				(cooling/heating)
	1-3/16(30)
	1-3/8(35)	17-15/32(444)Gas pipe		4-27/32(123)
	2-19/32(66)
		18-31/32(482)Liquid pipe		6-1/16(154)
		23-1/32(585)Drain hose		5-9/32(134)

Under side

Piping connection

Vane(auto)

Louver(manual)

Liquid pipe

Refrigerant pipe: 3/8 O.D(:9.52)

B

B

Flared connection: 3/8F

Knockout hole

Sleeve

Through hole

for lower piping

Gas pipe

Refrigerant pipe: 5/8 O.D(:15.88)

(purchased locally)

Flared connection: 5/8F

:2-15/16

:2-15/16~:3-5/32

Drain hose

5/8(:16) O.D

(:75)

(:75~:80)

Required space(Indoor unit)

Air inlet

Knockout hole for piping

27/32(250)-Min.9

7/8(48)-Min.1

5/8(67)-2 1/32(77)-3

9/16(65)-2

5/16(7.8) 1/32(77)-3

5/8(67)-2

A

C

B

Air outlet

5/16(7.8)

Min.8-21/32(220)

Min.2(50.5)

2-9/16(65)

3-1/32(77)

2-9/16(65)

3-7/16(87)

Min.2-27/32(72.4)

13/32(10.7)

Center measurement hole

:3/32(:2.5)

0

2-1/8(54)

1/8(3)

3/8(517.4)-20

4-:11/32(:9) Bolt hole

11/32(110)-4

3/8(60)-2 13/32(10) 0 13/32(10) 3/8(60)-2

11/32(110)-4

3/8(314)-12

11/32(364)-14

1/8(384.5)-15

3/32(408.5)-16

9/32(439)-17 7/8(454)-17 5/16(465.5)-18

Tapping

7/8(454)-17 9/32(439)-17 3/32(408.5)-16 1/8(384)-15

11/32(364)-14

3/8(314)-12

Mount board

Indoor unit outline

75-:3/16(:5.1)

screw hole

2-1/8(54)

1-1/4(32)

5/8(15.5)

31/32(25)

1/2(12.5)

0

0

31/32(25)

1/2(12.5)

1-31/32(50)

1-15/32(37.5)

2-15/16(75)

2-15/32(62.5)

3-15/16(100)

3-7/16(87.5)

4-19/32(117)

4-1/8(104.5)

4-29/32(125)

5-3/32(129.5)

5-19/32(142)

6-9/16(167)

7-9/16(192)

8-17/32(217)

9-17/32(242)

9-1/32(229.5)

11(279.5)

10-13/32(264)

11-1/2(292)

11-1/2(292)

12-5/32(308.5)

0

R1

11/32(339)-13

12-1/4(311)

1/32(585)-23

7/8(530.5)-20

15/16(430.5)-16

1/8(384)-15

11/32(339)-13

7/16(189)-7

17/32(216.5)-8

3/4(349.2)-13

1/8(384)-15

11/16(449.2)-17

1/32(585)-23

-

15/

32(R37

.

Knockout hole for

5)

Wall hole for

rear piping

Wall hole for

left rear piping

2-15/16×18-29/32(75×480)

right rear piping

9

7 WIRING DIAGRAM

PKA-A24KA.TH PKA-A30KA.TH PKA-A36KA.TH PKA-A24KAL.TH PKA-A30KAL.TH PKA-A36KAL.TH

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 applies, 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.

10