Mitsubishi Electronics PU12EK, PU18EK, PU18EK1, PU24EK, PU24EK1 User Manual

SPLIT-TYPE, AIR CONDITIONERS

No. OC247

REVISED EDITION-E

TECHNICAL & SERVICE MANUAL

<Outdoor unit> Models PU12EK

PU18EK PU18EK1

PU24EK PU24EK1 PU24EK2 PU24EK3 PU30EK PU30EK1 PU30EK2 PU30EK3 PU36EK PU36EK1 PU36EK2 PU36EK3 PU42EK2 PU42EK21

PU42EK7 PU42EK71 PU42EK72

	Model name
Outdoor unit	indication

Revision:

•Wiring diagram for PU12EK has been modified in ”8. WIRING DIAGRAM”.

•Transformer and outdoor controller board for PU12EK has been modified in ”13. PARTS LIST”.

Note:

•Refer to other manual as for Indoor Units.

•Please void OC247 REVISED EDITION-D.

CONTENTS

1.FEATURES ····················

2.TECHNICAL CHANGE···············

3.COMBINATION OF INDOOR AND OUTDOOR UNITS ·········

4.PART NAMES AND FUNCTIONS···········

5.SPECIFICATIONS ·················

6.DATA·······················

7.OUTLINES AND DIMENSIONS ···········

8.WIRING DIAGRAM·················

9.REFRIGERANT SYSTEM DIAGRAM ···········

10.MICROPROCESSOR CONTROL···········

11.TROUBLESHOOTING ················

12.DISASSEMBLY INSTRUCTIONS···········

13.PARTS LIST····················

TM

C US

L ISTED

Correction:

“ 13. PARTS LIST ” has been modified on page 33 and 43.

	Page	Revise point	Model	Incorrect	Correct
		FUNCTIONAL PARTS
		No.12 CAPILLARY		T7W 588 425	T7W E07 425
		TUBE
		FUNCTIONAL PARTS
	33	No.17 TRANSFORMER	PU12EK	T7W 850 799	T7W A30 799
		FUNCTIONAL PARTS
		No.20 OUTDOOR		T7W 850 315	T7W E08 315
		CONTROLLER BOARD
		FUNCTIONAL PARTS	PU42EK7
	43		PU42EK71	T7W A05 763	T7W 853 763
		No.1 FAN MOTOR
			PU42EK72

1 FEATURES

1. REDI-CHARGED REFRIGERANT SYSTEM

The industry’s first redi-charged refrigerant system.

There is no need to adjust the amount of refrigerant to match the piping length onsite unless lines exceed 100ft.

You will see a major reduction in installation time and labor costs.

2. HIGH RELIABILITY AND EASY SERVICING

In addition to the self-diagnostic function, units are also equipped with a 3-minute time delay mechanism (cooling), an auto restart function, an emergency operation function, a test run switch, etc., to assure high reliability and easy servicing.

3. FOUR-WAY PIPING ACCESS MAKES INSTALLATION LAYOUT EASY

Piping on the outdoor unit may be connected from either of four directions: front, rear, side or beneath the base.

This easy-access design makes it possible to install a number of units in a compact arrangement at a single site. The outdoor unit allows for unheard-of flexibility in determining a piping layout, thus greatly simplifying installation.

	Rear
Front	Right
	Base

4. FRONT-ACCESS FACILITATES MAINTENANCE

The outdoor unit has been designed with a front-access service panel that allows easy access to all maintenance point, regardless of the installation layout. What’s more, this front panel may be removed by loosening only two screws. It all adds up to greatly simplified maintenance work.

2

2 TECHNICAL CHANGE

(OC247 REVISED EDITION-A)

Change of the service parts.

Refer to “13. PARTS LIST” for the details.

PU18EK PU18EK1

PU24EK PU24EK1

PU30EK PU30EK1

PU36EK PU36EK1

PU42EK2 PU42EK21

1.OUTDOOR CONTROLLER BOARD has been changed.

2.TRANSFORMER has been changed.

PU18EK PU18EK1

• CONTACTOR has been changed.

(OC247 REVISED EDITION-B) PU24EK1 PU24EK2 PU30EK1 PU30EK2 PU36EK1 PU36EK2

•COMPRESSOR has been changed.

(PU24EK model) NH33NBD NH33NBDT (PU30EK model) NH41NAD NH41NAHT (PU36EK model) NH47NAD NH47NAHT

Refer to “5. SPECIFICATIONS”, “6. DATA” and “13. PARTS LIST” for details.

PU42EK7 PU42EK71

1.COMPRESSOR CONTACTOR has been changed to the one equipped THERMAL RELAY. Refer to 8.WIRING DIAGRAM and 13.PARTS LIST for details.

2.OUTDOOR CONTROLLER BOARD has been changed. Refer to “13. PARTS LIST” for details.

(OC247 REVISED EDITION-D) PU24EK2 PU24EK3 PU30EK2 PU30EK3 PU36EK2 PU36EK3 PU42EK71 PU42EK72

• DRAIN PAN has been added.

<‘‘13. PARTS LIST’’ has been changed.>

PU36EK2 PU36EK3

• COMPRESSOR CAPACITOR for PU36EK, PU36EK1, PU36EK2 and PU36EK3 are unified.

3

3 COMBINATION OF INDOOR AND OUTDOOR UNITS

		Indoor unit			Outdoor unit
					PU
			12	18	24	30	36	42
	Models	Service			EK1	EK1	EK1	EK7
		manual No.
			EK	EK EK1	EK EK2	EK EK2	EK EK2	EK2 EK21 EK71
					EK3	EK3	EK3	EK72

PL • AK	OC246		—	—	—	—	—	—
PL • FK(2)	OC001 SECOND EDITION
	OC003 SECOND EDITION							—
	OC194
PC • EK	OC001 SECOND EDITION
	OC003 SECOND EDITION	—	—	—				—
	OC192
PK • EK	OC001 SECOND EDITION					—	— —	— —
	OC003 SECOND EDITION

PK • FK(3)	OC121, OC196A		—	—	—	—	—	—	—
	OC274
PK • FL(3)	OC185A, OC275	—	—	—	—	—	—	—	—
PC • GK	OC278	—	— —	—	—	—	—	—

4 PART NAMES AND FUNCTIONS

Air outlet	Air outlet
Air intake	Air intake

PU12EK	PU18EK
Outdoor unit	PU18EK1
	Outdoor unit

Air outlet

Air outlet

Air intake

Air intake

PU24EK	PU30EK	PU36EK	PU42EK2	PU42EK7
PU24EK1	PU30EK1	PU36EK1	PU42EK21	PU42EK71
PU24EK2	PU30EK2	PU36EK2		PU42EK72
PU24EK3	PU30EK3	PU36EK3
Outdoor unit		Outdoor unit

4

5 SPECIFICATIONS

MODELS : PU12EK PU18EK PU24EK PU30EK PU36EK PU42EK2 PU42EK7 PU18EK1 PU24EK1 PU30EK1 PU36EK1 PU42EK21 PU42EK71 PU24EK2 PU30EK2 PU36EK2 PU42EK72

PU24EK3 PU30EK3 PU36EK3

Model

PU12EK

PU18EK

PU24EK

PU30EK

PU36EK

PU42EK2

PU42EK7

Item

OUTDOOR UNIT MODELS

PU18EK

PU24EK

PU24EK2

PU30EK

PU30EK2

PU36EK

PU36EK2

PU42EK2

PU42EK7

PU12EK

PU42EK71

PU18EK1

PU24EK1

PU24EK3

PU30EK1

PU30EK3

PU36EK1

PU36EK3

PU42EK21

PU42EK72

External finish

Munsell 5Y 7/1

Power supply

V, phase, Hz

208/230, 1, 60

Max.fuse size (time delay)

A

15

20

30

40

Min.ampacity

A

11

16

20

22

27

28

Fan motor

F.L.A.

0.65

0.75

0.65+0.65

0.75+0.75

0.8+0.8

Model (type)

RH167NAB

RH247NAB

NH33NBD

NH33NBDT

NH41NAD

NH41NAHT

NH47NAD

NH47NAHT

NH569NXA

ZR42K3PFV

Compressor

R.L.A.

8.9

12.0

11.5

10.8

14.0

12.9

17.5

15.1

20.0

20.4

L.R.A.

29

37

52

57

73

75

87

81

105

109

Crankcase heater

A(W)

0.11/0.12(23/28)

0.16/0.17(33/39)

Refrigerant control

Capillary tube

Sound level

dB

50

53

55

56

W

in.

34-1/4

38-3/16

Dimensions

D

in.

11-5/8

13-9/16

H

in.

25-9/16

33-1/2

49-9/16

Weight

lb

105

154

207

208

220

222

260

220

210

Control voltage (by built-in transformer)

Indoor unit-outdoor unit:DC12V

Name

R22

REFRIGERANT

Charge

4 lbs 14 oz

5 lbs 8 oz

9 lbs 15 oz

10 lbs 2 oz

10 lbs 9 oz

12 lbs 9 oz

11 lbs 0 oz

Oil<Model> OZ

16<MS-56>

37<MS32(N-1)>

40<MS32(N-1)>

49<MS32(N-1)>

42<SONTEX 200LT>

REFRIGERANT PIPING

Not supplied(optional parts)

Pipe size

Liquid

in.

3/8

1/2

Gas

in.

5/8

3/4

Connection

Indoors

Flared

method

Outdoors

Flared

Between the indoor

Height difference

ft

Max. 130

Max, 164

& outdoor units

Piping length

ft

Max. 130

Max. 164

Operating range

	Indoor intake air temperature		Outdoor intake air temperature
Maximum	D.B. 95˚F,	W.B. 71˚F	D.B. 115˚F
Cooling	D.B. 67˚F,	W.B. 57˚F	D.B. 0˚F w
Minimum

w In case of the wind baffle installed.

(In case of the wind baffle is not installed, the minimum temperature is D.B. 23˚F)

5

6			DATA
1. ADDITIONAL REFRIGERANT CHARGE (R22 : oz)
Service Ref.									Piping length (one way)													Factory
					100 ft		115 ft			130 ft		145 ft			160 ft				164 ft			charged
PU12EK					0	2			4				—		—				—			4 lbs 14 oz
PU18EK					0	2			4				—		—				—			5 lbs 8 oz
PU18EK1
PU24EK
PU24EK1					0	2			4			6			8				9			9 lbs 15 oz
PU24EK2
PU24EK3
PU30EK
PU30EK1					0	5			10			14			19				20			10 lbs 2 oz
PU30EK2
PU30EK3
PU36EK
PU36EK1					0	5			10			14			19				20			10 lbs 9 oz
PU36EK2
PU36EK3
PU42EK2					0	5			10			14			19				20			12 lbs 9 oz
PU42EK21
PU42EK7					0	5			10			14			19				20			11 lbs 0 oz
PU42EK71
PU42EK72
2. COMPRESSOR TECHNICAL DATA													at 68°F (Only PU42EK7 PU42EK71 : at 77°F)
Unit					PU12EK		PU18EK			PU24EK			PU24EK2					PU30EK			PU30EK2
							PU18EK1			PU24EK1			PU24EK3					PU30EK1			PU30EK3
Compressor model					RH167NAB		RH247NAB			NH33NBD			NH33NBDT				NH41NAD				NH41NAHT
Winding			R-C		2.47		1.59			0.92			0.92					0.63			0.62
Resistance
			S-C		4.62		3.22			1.93			1.93					1.37			1.51
( " )
							at 68°F(Only PU42EK7 PU42EK71 : at 77°F)
					PU36EK		PU36EK2			PU42EK2			PU42EK7
Unit													PU42EK71
					PU36EK1		PU36EK3			PU42EK21
													PU42EK72
Compressor model					NH47NAD		NH47NAHT			NH569NXA			ZR42K3PFV
Winding			R-C		0.55		0.52			0.55			0.54
Resistance
			S-C		1.24		1.28			1.24			1.28
( " )

6

3. NOISE CRITERION CURVES

PU12EK							SPL(dB)		LINE
								50
BAR	90
0.0002 MICRO	80
	70								NC-70
dB re
LEVEL,	60
									NC-60
PRESSURE	50
									NC-50
	40
									NC-40
SOUND
	30
BAND									NC-30
	20	APPROXIMATE
OCTAVE
		THRESHOLD OF
		HEARING FOR							NC-20
		CONTINUOUS
		NOISE
	10
		63	125	250	500	1000	2000	4000	8000

BAND CENTER FREQUENCIES, Hz

	PU24EK			PU30EK
	PU24EK1			PU30EK1
	PU24EK2			PU30EK2				SPL(dB)		LINE
	PU24EK3			PU30EK3					55
	BAR	90
	MICRO	80
	0.0002	70								NC-70
	dB re
		60
	LEVEL,
										NC-60
	PRESSURE	50
										NC-50
		40
										NC-40
	SOUND
		30
										NC-30
	BAND
		20	APPROXIMATE
	OCTAVE
			THRESHOLD OF
			HEARING FOR							NC-20
			CONTINUOUS
			NOISE
		10	63	125	250	500	1000	2000	4000	8000

BAND CENTER FREQUENCIES, Hz

	PU18EK							SPL(dB)		LINE
	PU18EK1								53
	BAR	90
	0.0002 MICRO	80
		70								NC-70
	dB re
		60
	LEVEL,
										NC-60
	PRESSURE	50
										NC-50
		40
										NC-40
	SOUND
		30
										NC-30
	BAND
		20	APPROXIMATE
	OCTAVE
			THRESHOLD OF
			HEARING FOR							NC-20
			CONTINUOUS
			NOISE
		10	63	125	250	500	1000	2000	4000	8000

BAND CENTER FREQUENCIES, Hz

	PU36EK
	PU36EK1
	PU36EK2							SPL(dB)		LINE
	PU36EK3								55
	BAR	90
	0.0002 MICRO	80
		70								NC-70
	dB re
		60
	LEVEL,
										NC-60
	PRESSURE	50
										NC-50
		40
										NC-40
	SOUND
		30
										NC-30
	BAND
		20	APPROXIMATE
	OCTAVE
			THRESHOLD OF
			HEARING FOR							NC-20
			CONTINUOUS
			NOISE
		10	63	125	250	500	1000	2000	4000	8000

BAND CENTER FREQUENCIES, Hz

7

PU42EK2			PU42EK7
PU42EK21			PU42EK71				SPL(dB)		LINE
			PU42EK72					56
BAR	90								MICROPHONE	UNIT
MICRO
	80								3.3ft
0.0002
	70								3.3ft
									NC-70
dB re
	60
LEVEL,
									NC-60
PRESSURE	50								NC-50	GROUND
	40
SOUND									NC-40
	30
BAND									NC-30
	20	APPROXIMATE
OCTAVE		THRESHOLD OF
	10
		HEARING FOR							NC-20
		CONTINUOUS
		NOISE
		63	125	250	500	1000	2000	4000	8000
			BAND CENTER FREQUENCIES, Hz

8

7 OUTLINES AND DIMENSIONS

Outdoor Unit PU12EK

Unit : inch

necessary surrounding clearance

clearance.upper

Frontopening

Service space

(for N.E.C)

36

connection

5/8 flaredpipe-Refrigerant

connection

3/8

holeoutKnock -23/8

Knock out holes

1/16

holeoutKnock

drainage(refrigerant, wiring)and

Standardbolt length

Note:Allowadequate

1/2 1/2

wiring)and forpowerline1-

4

1 - 3/4

2 - 1/16

8

36

31/32 .max

3/4

3 - 5/32

- 4

OutdoorUnit -

outdoorandindoorforbedTerminalunit

-pipeflared

R25/32

-9/32

1/2

linepowerforbedTerminal

terminalGround

movingforHandle

panelService

3/8-2 pipingfrontfor

drainage(refrigerant,

1/8-4

5/16-1

pipingfrontfor

Bottom holepiping

shaped-U-2

notched holes

15/32

Refrigerant

connection

R25/32

21/32

25-9/16

1/4

1-25/32

R

17-15/32

14-1/4

1-21/32

11-11/16

11/16

13

9/16

11-3/32

1-3/32

1-9/16

7

19-11/16	Air in	34-1/4
7-9/32	Air out	11-7/8

		Airin			Outletguide	installationhole	forHandle	moving	20-5/8	3-1/32
										13-11/32
					1
					11-5/8
		mustsidebe open.	8	40	9/32		Rearfresh	airintake	airSideintake
surrounding clearance	installation)	The upper		10 units or less
Unit-Necessary	(Concentrated		1/2	For
Outdoor			4		moving					5-7/16
					Handle for

20-5/8	15/32 29/32 Oval holes (standard bolt M10)	Drain hole
1-9/16		hole
		Drain
1-5/16

29/32

Rear piping hole 3-3/4

2-9/16	right piping holes - detail Figures
	Front

9

Outdoor Unit PU18EK

PU18EK1

surroundingnecessaryclearance		Note:Allowadequate	clearance.	openingFront		Servicespace	N.E.C)(for 36
			1/2
	8		upper		4
					36
Unit						1/2
Outdoor			1/2

		14-1/4
11/16		13	9/16
		1-9/161-1/16
7-9/32
11/16	Air intake
19-
7-9/32			Air outlet
		Air intake

	open.
	mustbe	8	40
surrounding clearance	installation) The upper side		10 units or less
Unit-Necessary	(Concentrated	1/2	For
Outdoor		4

Unit : inch

								holes for 1-1/16
								out line
					1-3/4		2-1/16	Knock power
connection							2-3/8	4-3/4
unit	blockTerminalfor power line	Ground terminal movingforHandle	panelService					(refrigerant.drainage andwiring)
blockTerminalfor indoor and outdoor				Refrigerant pipe	(Flared) 5/8	Refrigerant pipe (Flared) 3/8	3/8-2
							holeoutKnock pipingfrontfor
				33-1/2
				21-3/4
						13-7/8
					13-7/4
				15-7/8
34-1/4
	7/8						20-5/8
	11-
				20-5/18		7-1/18	-9/16
							1
		Outlet guide installation hole		17-3/18
	1			Handlefor moving			2
	11-5/8
	1/4
							1
		Side air intake		Rear fresh air intake

Rear piping hole

3-3/4

for	5-7/16
Handle	moving

		R13/16
		(refrigerant. drainage	R13/16
Knock out hole for right piping			and wiring)	hole
				piping
	1-3/4			Bottom
	1-5/8
4-1/8	1-5/16
Oval holes	W3/8(M10)
1/2x7/8	(standard bolt
			Drain hole

1.max	Standard bolt length
3-1/8		rightpiping holesfigures
	2-9/16
		Front detail
	11/16
R1/4
		1/2
	2-U-shaped notched holes

Drain hole

10

Outdoor Unit PU24EK PU30EK PU24EK1 PU30EK1 PU24EK2 PU30EK2 PU24EK3 PU30EK3

necessary-UnitOutdoor surrounding clearance		Note:Allow adequate upper clearance. 1/2 1/2	Frontopening		forblockTerminal outdoorandindoor	connectionunit	linepowerforblockTerminal
	12			4	space Service		N.E.C) (for
				36
						36
					3/8
				14-1/4
		11/16		13		9/16
				1-9/161-1/16
		7-9/32
		11/16	Air intake			34-1/4
		19-
		7-9/32				Air outlet	11-7/8
				Air intake			Outlet guide installation hole
							1

Service panel

Unit : inch

	49-9/16
Ground terminal	Handle for moving

1-3/4

RefrigerantPU24EK [PU30EK [RefrigerantPU24EK [PU30EK [ (Flared)pipe5/83/4 (Flared)pipe3/81/2

37-34 15-7/8

15-1/16

	holes for 1-1/16
	out line
2-1/16	Knock power
-3/8	4-3/4		R13/16
2
				R13/16
Knock out hole for front piping	(refrigerant. drainage and wiring)	Knock out hole	for right piping	(refrigerant. drainage and wiring)
3/8				Bottom pipinghole
		2-1/4
2-		2-1/16
	1/8	1-9/16
	4-

Standard bolt length
1.max
3-1/8
2-9/16	right piping holesfigures
	Front detail
11/16

R1/4

1/2

2-U-shaped notched holes

				20-5/8	2-1/2x7/8 Oval holes bolt M10)W3/8(M10)	Drain hole
				-9/16	(standard
20-5/8	2-3/8	20-5/8	3-1/4
				1		hole
	23-1/16		13-9/16
		moving				Drain
		for
		Handle		2

					11-5/8
					1/4
		mustbe open.	12	40	Side air intake	Rear fresh	air intake
surrounding clearance	installation)	The upper side		10 units or less
Outdoor Unit-Necessary	(Concentrated		6 1/2	For		Handle for moving

1

Rear piping hole

3-3/4

5-7/16

11

Outdoor Unit PU36EK	PU42EK2	PU42EK7
PU36EK1	PU42EK21	PU42EK71
PU36EK2		PU42EK72
PU36EK3

Outdoor Unit - necessary surrounding clearance

12

Note:Allow adequate

upper clearance.

1/2	opening
	Front
1/2

11/16
7-9/32
5/8	Air intake
23-
7-9/32

6	spaceService	N.E.C)(for
36
		36
1/2
Terminal block for	indoor and outdoor unit connection	Terminal block for power line
16-1/4
14-31/32	9/16
1-9/161-1/16
	38-3/16
	Air outlet	13-7/8
Air intake		Outlet guide installation hole
		1

Service panel

	49-9/16
Ground terminal	Handle for moving

20-5/8	2-3/8
	23-1/16

clearance	be open.			1/4 13-9/16	freshRear
	sideupperThemust	12	40	airSideintake
Outdoor Unit-Necessary surrounding	(Concentrated installation)	6 1/2	For 10 units or less
					Handle for moving

37-3/4

20-5/8

Handle for moving

air intake

Unit : inch

				holes for	1-1/16
				out line
	1-3/4		2-1/16	Knock	power
			2-3/8	4-3/4			R13/16
	Refrigerantpipe (Flared) [3/4	Refrigerantpipe Flared) [1/2	holeoutKnock pipingfrontfor	drainage(refrigerant. wiring)and		holeoutKnock
							pipingrightfor	(refrigerant. anddrainagewiring)
								R13/16
			3/8-2		1/8	9/16-1		Bottom piping hole
	15 - 7/8					2 - 1/4
	15-1/16				2-1/16
					4-
					Oval holes	W3/8(M10)
			20-5/8		2-1/2x7/8	(standard bolt
		3-1/4	-9/16
			1				hole
	13-9/16
							Drain
			1-5/16

7/8

Rear piping hole 3-3/4

5-7/16

Standard bolt length
1.max
3-1/8
2-9/16	right piping holes-	figures
	Front	detail
11/16

R1/4

1/2

2-U-shaped notched holes

Drain hole

12

8			WIRING DIAGRAM
MODEL : PU12EK				PU18EK 1
SYMBOL			NAME		SYMBOL	NAME	SYMBOL	NAME
C			COMPRESSOR CAPACITOR		LD1 ~ LD8	LED <CHECK, SERVICE>	TH3	OUTDOOR COIL THERMISTOR
C3			FAN CAPACITOR		MC	COMPRESSOR	X11 <O. B>	CRANKCASE HEATER RELAY
CH			CRANKCASE HEATER		MF	OUTDOOR FAN MOTOR (INNER THERMOSTAT)	X12 <O. B>	COMPRESSOR RELAY
CN3<O. B>			CONNECTING WIRES INDOOR/OUTDOOR		O. B	OUTDOOR CONTROLLER BOARD	ZNR <O. B>	VARISTOR
			CONNECTOR		SW1, 2, 3<O. B>	SELECT SWITCH <CHECK, SERVICE>	52C	CONTACTOR
CN4T<O. B>			TRANSFORMER CONNECTOR		T	TRANSFORMER	63H2	HIGH PRESSURE SWITCH <PROTECT>
					FC <O. B>	FAN CONTROLLER	TB1	POWER SUPPLY TERMINAL BLOCK
					F <O. B>	FUSE <6A>	TB3	CONNECTING WIRES INDOOR/OUTDOOR
								TERMINAL BLOCK
							51C	OVERCURRENT RELAY

FROM INDOOR UNIT

1

YLW

LED

TH3

CONNECTING WIRES

2

ORN

12V DC (polar)

TB3

O.B

SW1

4

3

2

1

X12

X11

FC

SW2

LD1

LD2

LD3

LD4

LD5 LD6 LD7

LD8

CN2

CN4

5

SW3

26C

OFF

ON

X12

X11

63HI

2

1

63H2

2

MF1

CN3

1

CN4T

F

51CM

4

3

2

1

4

ZNR

TRF

52C

CH

R/1

S/2

T/3

GRY

GRY

WHT

WHT

BLU

BLU

YLM YLM

YLM

YLM

RED RED

BLU

BLU

WHT

S

RED

A

63H2

CH

MF

C3

52C

BRN

AC12.3V

RED

208V

ORN

B

WHT

RED

AC12.3V

ORN

WHT

T

230V

RED

WHT

TB1

52C

L1

RED

R

U

BLU

R

POWER SUPPLY

L2

WHT

WHT

2 51C 1

WHT

C

MC

208/230V

1phase 60Hz

GR

T

W

BLU

RED

S

GRN

C

Main functions of LED (when both No. 1 and 2 of

SW3€ are ¨OFF¨)

LED NO.	Output display (light)	Check display (flush)
LD1	Compressor indoor command	—
LD2	—	—
LD3	—	TH3 short / open
LD4	Compressor ON	63H2 functions
LD5	Outdoor fan ON	—
LD6	—	—
LD7	—	TH3 overheat protection
LD8	Crankcase heater ON	Defective input

NOTES :If the operation stops to function of the protection device, the check display flashes.

How to use SW1 and 2

●Pressing SW1€ erases the past check contents loaded on the microcomputer.

●The output display (light) remains during operation but pressing SW2€ displays the past check contents in flashing mode. Pressing the switch again returns to output display (light).

White connector

CAUTION FOR SERVICING

● s ⁄ı

The connector marked — — is to turn the compressor ON-OFF during servicing. The compressor stops by disconnecting the white connector as shown at the right.

CAUTION FOR POWER SUPPLY WIRING

● Since LD8 lights when normal power is turned "ON", check the power supply with the "ON" or "OFF" LD8.

Since the indoor transformer (T) is connected with 230V power, if 208V power is used, change the wiring connection in the following Procedure.

CAUTION FOR INDOOR AND OUTDOOR CONNECTING WIRES

When power Supply is 208V

RED	208V	WHITE
ORANGE	230V

● Since the indoor and outdoor connecting wires has polarity, make sure to connect the same terminal numbers (1, 2) for indoor and outdoor units.

13

MODELS : PU18EK

	SYMBOL	NAME	SYMBOL	NAME	SYMBOL	NAME
	C	COMPRESSOR CAPACITOR	LD1 ~ LD8	LED <CHECK, SERVICE>	TH3	OUTDOOR COIL THERMISTOR
	C3	FAN CAPACITOR	MC	COMPRESSOR	X11 <O. B>	CRANKCASE HEATER RELAY
	CH	CRANKCASE HEATER	MF3	OUTDOOR FAN MOTOR (INNER THERMOSTAT)	X12 <O. B>	COMPRESSOR RELAY
	CN3<O. B>	CONNECTING WIRES INDOOR/OUTDOOR	O. B	OUTDOOR CONTROLLER BOARD	ZNR <O. B>	VARISTOR
		CONNECTOR	SW1, 2, 3<O. B>	SELECT SWITCH <CHECK, SERVICE>	52C	CONTACTOR
	CN6T<O. B>	TRANSFORMER CONNECTOR	T	TRANSFORMER	63H2	HIGH PRESSURE SWITCH <PROTECT>
			FC <O. B>	FAN CONTROLLER	TB1	POWER SUPPLY TERMINAL BLOCK
			F3 <O. B>	FUSE <6A>	TB3	CONNECTING WIRES INDOOR/OUTDOOR
						TERMINAL BLOCK
					51C	OVERCURRENT RELAY

FROM INDOOR UNIT CONNECTING WIRES 12V DC (polar)

POWER SUPPLY 208/230V 1phase 60Hz

1

YLW

LED

TH3

2

ORN

TB3

O.B

SW1

LD8

LD7

X12

X11

CN2

FC

SW2

LD6

LD5

5

SW3

LD4

LD3

26C

OFF

LD2

ON

X12

X11

LD1

2

1

63H2

2

1 CN3

CN6T

F3

51CM

6

5

4

3

2

1

4

TRF

52C

CH

ZNR

R/1

S/2

T/3

MF3

GRY

GRY

WHT

WHT

BLU

BLU

YLM YLM

YLM

YLM

RED RED

BLU

BLU

WHT

S

RED

A

63H2

CH

MF3

C3

BRN

11.5V AC

RED

52C

208V

ORN

B

RED

15.5V AC

WHT

ORN

ORN

36.0V AC

WHT

T

230V

RED

WHT

TB1

52C

L1

RED

R

U

BLU

R

L2

WHT

WHT

2 51C 1

WHT

C

MC

T

W

GR

BLU

RED

S

GRN

C

Main functions of LED (when both No. 1 and 2 of €SW3 are ¨OFF¨)

LED NO.	Output display (light)	Check display (flush)
LD1	Compressor indoor command	—
LD2	—	—
LD3	—	Pipe temperature sensor short / open
LD4	Compressor ON	63H2 functions
LD5	Outdoor fan ON	—
LD6	—	—
LD7	—	TH3 overheat protection
LD8	Crankcase heater ON	Defective input

NOTES :If the operation stops to function of the protection device, the check display flashes.

How to use SW1 and 2

●Pressing SW1€ erases the past check contents loaded on the microcomputer.

●The output display (light) remains during operation but pressing SW2€ displays the past check contents in flashing mode. Pressing the switch again returns to output display (light).

White connector

CAUTION FOR SERVICING

● s ⁄ı

The connector marked— — is to turn the compressor ON-OFF during servicing. The compressor stops by disconnecting the white connector as shown at the right.

CAUTION FOR POWER SUPPLY WIRING

●Since LD8 lights when normal power is turned "ON", check the power supply with the "ON" or "OFF" LD8.

Since the indoor transformer (T) is connected with 230V power, if 208V power is used, change the wiring connection in the following Procedure.

CAUTION FOR INDOOR AND OUTDOOR CONNECTING WIRES

When power Supply is 208V

RED	208V	WHITE
ORANGE	230V

● Since the indoor and outdoor connecting wires has polarity, make sure to connect the same terminal numbers (1, 2) for indoor and outdoor units.

14