Mitsubishi PL-1.6KJB.UK, PL-2KJB.UK, PL-2.5KJB.UK Service Manual

1997

SPLIT-TYPE, AIR CONDITIONERS

No. OC146

TECHNICAL & SERVICE MANUAL

Series PL Ceiling Cassettes

Indoor unit [Model names]

PL-1.6KJB

PL-2KJB

PL-2.5KJB

[Service Ref.]

PL-1.6KJB.UK PL-2KJB.UK PL-2.5KJB.UK

INDOOR UNIT

	TIMER	TEMP TIMER/TEMP.		POWER	ON/OFF
	12	29
	11	28		COOL	MODE
	10	27		DRY
					SELECT
	9	26		FAN
	8	25	UP	HIGH	FAN
	7	24
				LOW	SPEED
	6	23
	5	22	DOWN
				ON	LOUVER
	4	21
	3	20		AUTO
	2	19		STOP	TIMER
	1	18		START	MODE

MITSUBISHI ELECTRIC

REMOTE CONTROLLER

This manual does not cover the following outdoor units. When serving them, please refer to the service manual No.OC149 and this manual in a set.

<Service Ref.>

PU-1.6VLJA2.UK PU-2VJA2.UK PU-2NJA1.UK PU-2.5VJA2.UK PU-2.5NJA1.UK

CONTENTS

1.FEATURES ···········································2

2.PART NAMES AND FUNCTIONS ········3

3.SPECIFICATIONS·································5

4.DATA ·····················································7

5.OUTLINES AND DIMENSIONS··········10

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

7.REFRIGERANT SYSTEM DIAGRAM ······13

8.OPERATION FLOW-CHART··············14

9.MICROPROCESSOR CONTROL·······17

10.TROUBLESHOOTING ························25

11.4-WAY AIR FLOW SYSTEM ···············27

12.DISASSEMBLY PROCEDURE···········28

13.PARTS LIST········································31

14.OPTIONAL PARTS ·····························35

The Slim Line.

From Mitsubishi Electric.

1 FEATURES

Series PL Ceiling Cassettes

	TIMER	TEMP TIMER/TEMP.		POWER	ON/OFF
	12	29
	11	28		COOL	MODE
	10	27		DRY
					SELECT
	9	26		FAN
	8	25	UP	HIGH	FAN
	7	24
				LOW	SPEED
	6	23
	5	22	DOWN
				ON	LOUVER
	4	21
	3	20		AUTO
				STOP	TIMER
	2	19
	1	18		START	MODE
				MITSUBISHI ELECTRIC

	Indoor unit		Remote controller
Service Ref.		Cooling capacity (50/60Hz)
		W	Btu/h
PL-1.6KJB.UK		3,800/ –	13,000/ –
PL-2KJB.UK		5,600/5,400	19,100/18,400
PL-2.5KJB.UK		6,500/7,000	22,200/23,900

1.PURSUING COMPACTNESS

(1)Panel size and body volume reduced to 64% of previous models

The width and depth of the panel have been reduced by 19cm respectively,resulting in a compact model which fits smaller environments (like shops) perfectly.

(2)Multi-application panels flexibly adapt to installation conditions.

Space panel and Wide panel may be installed on ceilings with shallow depth using the exiting opening .

2."SMUDGE-FREE", PRECISELY TARGETED AIRFLOW SYSTEM

The new control system regulates airflow to prevent smudging. A projection inside the air passage distributes air evenly over the top and bottom of the vane. Two projections on the air outlet work to prevent cooled air from rising to the celling, and also to stop outside air being dragged into the cooled air stream.

3.AIRFLOW ADJUSTABLE TO ANY INDOOR ENVIRONMENT

Airflow can be adjusted according to celling height and the number of air outlets. "Wide Zoming Flow" creates an optimum airflow for any indoor environment.

4.A FURTHER REFINEMENT OF COMFORT WITH NOISE SUPPRESION

The celling 4-way airflow cassette has a special "silent-design". The "2-Tap"system allows a choice between silent and standard modes according to the height of the cellig. For ordinary residenced which have a low celling, selection of the silent mode will result in remarkable noise reductions.

5.ECONOMICAL AND EASY MAINTENANCE

(1)Push-open grill

Filter clogging is widely recognized as a cause of reduced perfomance, but up until now it has been troublesome to clean filters. With the "push-open grill" the fillter can be smoothly opened out at the push of a button, enabling speedy cleaning.

(2)An unprecedented level of vane-cleaning

The unique airflow system prevents the intake of indoor air. Dewing therefore does not occur, and the vane is flockless. The resulting level of dirt on the vane due to tobacco smoke, dust, etc. is very light,and can be wiped off easily with a neutral detergent.

(3)Long-life filter

This new celling 4-way airflow cassette employs a long life fillter which requires no maintenance for up to 2,500 hours of operation in general office environments. It adds uo to an ideal blend of comfort and low maintenance.

2

6.COMPACT DIMENSIONS MEAN EASY INSTALLATION

(1)Carefree suspension work with lightweight unit

The new unit weighs in at 20kg and is easy to handle and install. What's more, suspension work is facillitated by compact dimensions ensuring a snug fit.

(2)Smooth installation with "one-direction"bolts

Suspension bolts can be fixes consistently from one direction easing suspension work.

(3)Trouble-free fitting work with slender refrigerant piping

Refrigerant piping has been reduced in size, and pipe-curving work at the installation site can now be completed quickly and economically. In addition, refrigerant and drain piping are set at different corners, which means that flare connections and drain piping heat insulation work can be smoothly and reliably implemented.

(4)Easy-access terminal and control panels for efficient wiring

When performing wiring work, progress can be checked on the power source terminal and control panels simply by removing the electrical parts cover. Address setting can also be done easily from beneath at a convenient angle.

(5)"One-push"to provisionally position front panel

Panel weight has been redused from 7kg to 3.7kg. The previous 3-step process for provisionally positioning the panel has been streamlined, and now a simple "one-push" action at the diagonal corners fixed it into place, resulting in major time-saving.

2 PART NAMES AND FUNCTIONS

● Indoor Unit

PL-1.6KJB.UK PL-2KJB.UK PL-2.5KJB.UK

Horizontal Air Outlet

Sets airflow horizontal automatically during cooling or dehumidifying.

Downward Air Outlet Sets airflow downward automatically during heating.

Filters

Remove dust and pollutants from inhaled air

Grill

Auto Air Swing Vane Disperses airflow up and down and adjusts the angle of airflow direction.

Air Intake

Inhales air from room.

3

● Controller

TIMER/TEMP. button

This button is used to change between display of room temperature and display of remaining time on the timer during “AUTO STOP” operation.

Green lamps light in selected display mode.

Lamps display remaining time on the timer or room temperature.

Remaining timer time display

Lamps indicate time remaining until timer stops operation. Green lamps display the remaining number of hours.

Room temperature display

Lamps display temperature settings actual room temperatures. ●Temperature settings :

Green lamps light. ●Temperature in room :

Green lamps flash.

(Example display readings are for explanations only, so actual display readings will differ.)

Settings remain in effect' until changed. The air conditioner can be operated by simply pressing ON/OFF button once settings have been made.

Display panel Operating panel

TIMER TEMP TIMER/TEMP.	POWER	ON/OFF

	12	29
	11	28		COOL	MODE
	10	27		DRY
					SELECT
	9	26		FAN
	8	25	UP	HIGH	FAN
	7	24
				LOW	SPEED
	6	23
	5	22	DOWN
				ON	LOUVER
	4	21
	3	20		AUTO
				STOP	TIMER
	2	19
				START	MODE
	1	18
				MITSUBISHI ELECTRIC

UP and DOWN buttons

●Temperature control (While green “TEMP” lamp is lighting.)

Use UP and DOWN buttons to set desired temperature between 18 and 29 °C.

●Timed operation (While green “TIMER“ lamp is lighting.)

Use UP and DOWN buttons to set timed operation between one and twelve hours.

ON/OFF button

Pressing button starts operation. Pressing again stops operation.

Green lamp remains lit during operation.

MODE SELECT button

This button is used to change between cooling, DRYING and ventilation operation modes. One of three green lamps lights to indicate mode in effect.

FAN SPEED button

This button is used to change between low and high fan speeds. One of two green lamps lights to indicate which fan speed is in effect.

LOUVER button

This button is used to switch swing louver ON/OFF.

TIMER MODE button

Used to select timed starting or stopping. Green lamp lights to indicate timer mode selected.

Attention

●Pressing the UP and DOWN buttons together for more than two seconds will initiate the “test run” or “self-diagnostic” mode. Avoid pressing these buttons simultaneously during normal operation. Press the ON/OFF button to cancel test run or self-

diagnostic mode.

●All green lamps turn off when air conditioner is OFF.

●Avoid operation of buttons with fingernails or other sharp objects. Sharp objects may scratch operating panel.

4

5 SPECIFICATIONS

1. STANDARD SPECIFICATIONS

		Service Ref.	PL-1.6KJB.UK	PL-2KJB.UK	PL-2.5KJB.UK
	Item
		W	3,800	5,600	6,500
		50Hz	13,000	19,100	22,200
	Cooling capacity w1	Btu/h
		W	–	5,400	7,000
		60Hz	–	18,400	23,900
		Btu/h
	Cooling capacity w2	W	–	4,500	5,950
		60Hz	–	15,400	20,300
		Btu/h
	Total input (50/60Hz) w3	kW	1.54/–	2.57/2.59	2.59/3.05
	Service Ref.		PL-1.6KJB.UK	PL-2KJB.UK	PL-2.5KJB.UK

		External finish			Galvanized sheets with gray heat insulation
		Fan motor output		kW	0.03	0.03	0.03
			50Hz	CMM	13-15	13-16	14-17
		Airflow Lo-Hi		CFM	460-530	460-565	495-600
			60Hz	CMM	13-15	13-16	14-17
	unit			CFM	460-530	460-565	495-600
		External static pressure		mmAq,Pa		0 (Direct blow)
	Indoor
		Operation control & Thermostat				Remote control & Built-in
		Noise level Low-High	50Hz	dB(A)	31-35	32-37	35-39.5
			60Hz	dB(A)	31-35	32-37	35-39.5
		Cond. drain connection OD		mm(in.)	32 (1-1/4)	32 (1-1/4)	32 (1-1/4)
			W	mm(in.)	660 (26)	660 (26)	660 (26)
		Dimensions	D	mm(in.)	660 (26)	660 (26)	660 (26)
			H	mm(in.)	253 (10)	253 (10)	253 (10)
		Weight		kg(lbs.)	19 (42)	19 (42)	20 (44)
	grill	External finish				Munsell 0.70Y 8.59/0.97
			W	mm(in.)	760 (30)	760 (30)	760 (30)
	Indoor	Dimensions	D	mm(in.)	760 (30)	760 (30)	760 (30)
			H	mm(in.)	30 (1-1/8)	30 (1-1/8)	30 (1-1/8)
		Weight		kg(lbs.)	3.7 (8)	3.7 (8)	3.7 (8)
		Service Ref.			PU-1.6VLJA2.UK	PU-2VJA2.UK, 2NJA1.UK	PU-2.5VJA2.UK, 2.5NJA1.UK
		External finish				Munsell 5Y7/1
		Refrigerant (R-22) control				Capillary tube
		Crankcase Heater w4		W	–	32/–	32/–
	unit	Compressor output	50/60Hz	kW	1.2/-	2.0/1.5	2.0/1.7
		Protection devices			Inner thermostat, HP switch, LP switch
	Outdoor	Fan motor output		kW	0.065	0.065	0.085
		Airflow	50Hz	CMM(CFM)	45(1588)	45(1588)	50(1765)
			60Hz	CMM(CFM)	45(1588)	45(1588)	50(1765)
		Noise level	50/60Hz	dB(A)	49/–	49/50	52/53
			W	mm(in.)	870(34-1/4)	870(34-1/4)	870(34-1/4)
		Dimensions	D	mm(in.)		295+24(11-5/8+1)
			H	mm(in.)	650(25-5/8)	650(25-5/8)	850(33-7/16)
		Weight		kg(lbs.)	45(99)	60(132)	71(157)

Notes :
w1 Rating conditions (JIS B8616)		w2 Rating conditions (SSA 385, 386)
Indoor : 27°C (80°F) DB, 19°C (66°F)WB		Indoor : 29°C (84°F) DB, 19°C (66°F)WB
Outdoor : 35°C (95°F) DB, 24°C (75°F)WB		Outdoor : 46°C (115°F) DB, 24°C (75°F)WB
Refrigerant piping length (one way) : 5m (16ft)		Refrigerant piping length (one way) : 5m (16ft)
w3 Total input based on indicated voltage		w4 Capacity of crankcase heater (W) based on 220 volts.
	(Indoor / Outdoor)
Service Ref.	PL-1.6KJB.UK / PL-2KJB.UK / PL-2.5KJB.UK
50Hz	1ph 220V/1ph 220V
60Hz	1ph 220V/1ph 220V

Rating conditions (JIS B 8616)

5

2. POWER SUPPLY & MODEL NAMES

	Power supply		Service Ref. (Indoor unit)	Model name (Outdoor unit)
				PL-1.6KJB.UK	PL-2KJB.UK	PL-2.5KJB.UK
	50Hz	1ph.	220, 230, 240V	PU-1.6VLJA2.UK	PU-2VJA2.UK	PU-2.5VJA2.UK
		3ph.	380/220, 400/230, 415/240V	–	–	–
	60Hz	1ph.	220V	–	PU-2NJA1.UK	PU-2.5NJA1.UK
		3ph.	220V	–	–	–

Notes : 1. Power supply key N...1ph, 220V,60Hz

V(L)...1ph, 220, 230, 240V, 50Hz

2.Primary power supplies for all indoor units are single-phase.

3.ELECTRICAL SPECIFICATIONS

(1). Rating conditions - JIS B 8616 Indoor : 27°C (80°F) DB, 19°C (66°F) WB Outdoor : 35°C (95°F) DB, 24°C (75°F) WB

Series PL Indoor Unit (Single Phase)

Power supply (1 Phase)			V : 220V 50Hz			V : 230V 50Hz
Service Ref.		PL-1.6KJB.UK	PL-2KJB.UK	PL-2.5KJB.UK	PL-1.6KJB.UK	PL-2KJB.UK	PL-2.5KJB.UK
Current	A	0.59	0.60	0.60	0.62	0.63	0.63
Input	kW	0.12	0.13	0.13	0.13	0.14	0.14
Starting current	A	0.80	0.80	0.80	0.80	0.80	0.80
Outdoor unit		PU-1.6	PU-2	PU-2.5	PU-1.6	PU-2	PU-2.5
Power supply (1 Phase)			V : 240V 50Hz		N : 220V 60Hz
Service Ref.		PL-1.6KJB.UK	PL-2KJB.UK	PL-2.5KJB.UK	PL-2KJB.UK	PL-2.5KJB.UK
Current	A	0.64	0.65	0.65	0.65	0.66
Input	kW	0.14	0.15	0.15	0.14	0.14
Starting current	A	0.80	0.80	0.80	0.80	0.80
Outdoor unit		PU-1.6	PU-2	PU-2.5	PU-2	PU-2.5

6

4 DATA

1. PERFORMANCE DATA

Cooling capacity 50Hz

Service Ref.					PL-1.6KJB.UK			PL-2KJB.UK			PL-2.5KJB.UK
	Temperature			T.C.		C.F.	T.C.		C.F.	T.C.		C.F.
Outdoor DB		Indoor WB				(T.I.)			(T.I.)			(T.I.)
		16 C (60.8 F)		3.8		0.81	5.6		0.81	6.5		0.81
21 C		18 C (64.4 F)		4.1		0.82	6.0		0.82	6.9		0.82
		19 C	(66.2 F)	4.2		0.83	6.2		0.83	7.2		0.83
(69.8 F)		19.4 C	(67 F)	4.2		0.83	6.2		0.83	7.3		0.83
		20 C	(68 F)	4.3		0.84	6.4		0.84	7.4		0.84
		22 C (71.6 F)		4.6		0.86	6.7		0.86	7.8		0.86
		16 C (60.8 F)		3.7		0.84	5.5		0.84	6.4		0.84
25 C		18 C (64.4 F)		4.0		0.85	5.9		0.85	6.8		0.85
		19 C	(66.2 F)	4.1		0.86	6.0		0.86	7.0		0.86
(77 F)		19.4 C	(67 F)	4.2		0.86	6.1		0.86	7.1		0.86
		20 C	(68 F)	4.2		0.87	6..2		0.87	7.2		0.87
		22 C (71.6 F)		4.5		0.89	6.6		0.89	7.7		0.89
		16 C (60.8 F)		3.6		0.90	5.3		0.90	6.1		0.90
30 C		18 C (64.4 F)		3.8		0.92	5.6		0.92	6.6		0.92
		19 C	(66.2 F)	4.0		0.93	5.8		0.93	6.8		0.93
(86 F)		19.4 C	(67 F)	4.0		0.93	5.9		0.93	6.9		0.93
		20 C	(68 F)	4.1		0.94	6.0		0.94	7.0		0.94
		22 C (71.6 F)		4.3		0.96	6.4		0.96	7.4		0.96
		16 C (60.8 F)		3.5		0.93	5.2		0.93	6.0		0.93
32.2 C		18 C (64.4 F)		3.8		0.95	5.5		0.95	6.4		0.95
		19 C	(66.2 F)	3.9		0.96	5.7		0.96	6.6		0.96
(90 F)		19.4 C	(67 F)	3.9		0.97	5.8		0.97	6.7		0.97
		20 C	(68 F)	4.0		0.97	5.9		0.97	6.9		0.97
		22 C (71.6 F)		4.3		0.99	6.3		0.99	7.3		0.99
		16 C (60.8 F)		3.4		0.96	5.1		0.96	5.9		0.96
35 C		18 C (64.4 F)		3.7		0.99	5.4		0.99	6.3		0.99
		19 C	(66.2 F)	3.8		1.00	5.6		1.00	6.5		1.00
(95 F)		19.4 C	(67 F)	3.8		1.00	5.7		1.00	6.6		1.00
		20 C	(68 F)	3.9		1.01	5.8		1.01	6.7		1.01
		22 C (71.6 F)		4.2		1.04	6.2		1.04	7.2		1.04
		16 C (60.8 F)		3.3		1.03	4.9		1.03	5.6		1.03
40 C		18 C (64.4 F)		3.5		1.06	5.2		1.06	6.0		1.06
		19 C	(66.2 F)	3.6		1.07	5.4		1.07	6.2		1.07
(104 F)		19.4 C	(67 F)	3.7		1.08	5.4		1.08	6.3		1.08
		20 C	(68 F)	3.8		1.08	5.5		1.08	6.4		1.08
		22 C (71.6 F)		4.0		1.11	5.9		1.11	6.9		1.11
		16 C (60.8 F)		3.3		1.04	4.8		1.04	5.6		1.04
40.6 C		18 C (64.4 F)		3.5		1.06	5.2		1.06	6.0		1.06
		19 C	(66.2 F)	3.6		1.08	5.3		1.08	6.2		1.08
(105 F)		19.4 C	(67 F)	3.7		1.08	5.4		1.08	6.3		1.08
		20 C	(68 F)	3.7		1.09	5.5		1.09	6.4		1.09
		22 C (71.6 F)		4.0		1.12	5.9		1.12	6.8		1.12
		16 C (60.8 F)		3.1		1.10	4.6		1.10	5.4		1.10
45 C		18 C (64.4 F)		3.4		1.12	4.9		1.12	5.7		1.12
		19 C	(66.2 F)	3.5		1.14	5.1		1.14	5.9		1.14
(113 F)		19.4 C	(67 F)	3.5		1.15	5.2		1.15	6.0		1.15
		20 C	(68 F)	3.6		1.16	5.3		1.16	6.1		1.16
		22 C (71.6 F)		3.8		1.20	5.7		1.20	6.6		1.20
		16 C (60.8 F)		3.1		1.11	4.6		1.11	5.3		1.11
46 C		18 C (64.4 F)		3.3		1.14	4.9		1.14	5.7		1.14
		19 C	(66.2 F)	3.4		1.15	5.1		1.15	5.9		1.15
(115 F)		19.4 C	(67 F)	3.5		1.16	5.1		1.16	6.0		1.16
		20 C	(68 F)	3.6		1.17	5.2		1.17	6.1		1.17
		22 C (71.6 F)		3.8		1.21	5.6		1.21	6.5		1.21
		16 C (60.8 F)		3.0		1.16	4.4		1.16	5.1		1.16
50 C		18 C (64.4 F)		3.2		1.19	4.7		1.19	5.4		1.19
		19 C	(66.2 F)	3.3		1.21	4.9		1.21	5.6		1.21
(69.8 F)		19.4 C	(67 F)	3.3		1.22	4.9		1.22	5.7		1.22
		20 C	(68 F)	3.4		1.23	5.0		1.23	5.8		1.23
		22 C (71.6 F)		3.7		1.28	5.4		1.28	6.3		1.28
		16 C (60.8 F)		2.9		1.19	4.3		1.19	4.9		1.19
52 C		18 C (64.4 F)		3.1		1.22	4.6		1.22	5.3		1.22
		19 C	(66.2 F)	3.2		1.24	4.7		1.24	5.5		1.24
(125.5 F)		19.4 C	(67 F)	3.3		1.25	4.8		1.25	5.6		1.25
		20 C	(68 F)	3.3		1.26	4.9		1.26	5.7		1.26
		22 C (71.6 F)		3.6		1.31	5.3		1.31	6.1		1.31
Evaporator airflow (CMM)					15			16			17
Bypass factors					0.21			0.20			0.14
S.H.F. at rating conditions					0.67			0.74			0.72

Notes : 1. T.C. : Total capacity (kW) ... (kcal/h) = (kW) o 860, (Btu/h) = 4 o (kW) o 860

C.F. (T.I.) : Correction factors of Total input (Indoor unit input + Outdoor unit input)

2.(°F) = 32 + 9 / 5 (°C)

3.Guaranteed operation range (cooling) :

Lower limit ... Indoor : 21°C (70°F) DB, 15.5°C (60°F) WB, Outdoor : 21°C (70°F) DB. Upper limit ... Indoor : 35°C (95°F) DB, 22.5°C (72.5°F) WB, Outdoor : 52°C (125.5°F) DB.

wVL ... Outdoor : 46°C (115°F) DB.

Cooling capacity correction factors 50Hz

	Service Ref.			Refrigerant piping length (one way)
		5m (16ft)	10m (33ft)	15m (49ft)	20m (66ft)	25m (82ft)	30m (98ft)	35m (115ft)	40m (131ft)
	PL-1.6KJB.UK	1.0	0.992	0.987	0.982	–	–	–	–
	PL-2KJB.UK	1.0	0.985	0.975	0.964	0.954	0.944	–	–
	PL-2.5KJB.UK	1.0	0.983	0.972	0.961	0.951	0.940	–	–

7

Cooling capacity 60Hz

Service Ref.					PL-2KJB.UK			PL-2.5KJB.UK
	Temperature			T.C.		C.F.	T.C.		C.F.
Outdoor DB		Indoor WB				(T.I.)			(T.I.)
		16 C (60.8 F)		5.4		0.81	7.0		0.81
21 C		18 C (64.4 F)		5.8		0.82	7.5		0.82
		19 C	(66.2 F)	6.0		0.83	7.7		0.83
(69.8 F)		19.4 C	(67 F)	6.0		0.83	7.8		0.83
		20 C	(68 F)	6.1		0.84	7.9		0.84
		22 C (71.6 F)		6.5		0.86	8.4		0.86
		16 C (60.8 F)		5.3		0.84	6.9		0.84
25 C		18 C (64.4 F)		5.6		0.85	7.3		0.85
		19 C	(66.2 F)	5.8		0.86	7.6		0.86
(77 F)		19.4 C	(67 F)	5.9		0.86	7.7		0.86
		20 C	(68 F)	6.0		0.87	7.8		0.87
		22 C (71.6 F)		6.4		0.89	8.3		0.89
		16 C (60.8 F)		5.1		0.90	6.6		0.90
30 C		18 C (64.4 F)		5.4		0.92	7.1		0.92
		19 C	(66.2 F)	5.6		0.93	7.3		0.93
(86 F)		19.4 C	(67 F)	5.7		0.93	7.4		0.93
		20 C	(68 F)	5.8		0.94	7.5		0.94
		22 C (71.6 F)		6.2		0.96	8.0		0.96
		16 C (60.8 F)		5.0		0.93	6.5		0.93
32.2 C		18 C (64.4 F)		5.3		0.95	6.9		0.95
		19 C	(66.2 F)	5.5		0.96	7.2		0.96
(90 F)		19.4 C	(67 F)	5.6		0.97	7.3		0.97
		20 C	(68 F)	5.7		0.97	7.4		0.97
		22 C (71.6 F)		6.1		0.99	7.9		0.99
		16 C (60.8 F)		4.9		0.96	6.3		0.96
35 C		18 C (64.4 F)		5.2		0.99	6.8		0.99
		19 C	(66.2 F)	5.4		1.00	7.0		1.00
(95 F)		19.4 C	(67 F)	5.5		1.00	7.1		1.00
		20 C	(68 F)	5.6		1.01	7.2		1.01
		22 C (71.6 F)		5.9		1.04	7.7		1.04
		16 C (60.8 F)		4.7		1.03	6.1		1.03
40 C		18 C (64.4 F)		5.0		1.06	6.5		1.06
		19 C	(66.2 F)	5.2		1.07	6.7		1.07
(104 F)		19.4 C	(67 F)	5.2		1.08	6.8		1.08
		20 C	(68 F)	5.3		1.08	6.9		1.08
		22 C (71.6 F)		5.7		1.11	7.4		1.11
		16 C (60.8 F)		4.7		1.04	6.0		1.04
40.6 C		18 C (64.4 F)		5.0		1.06	6.4		1.06
		19 C	(66.2 F)	5.1		1.08	6.7		1.08
(105 F)		19.4 C	(67 F)	5.2		1.08	6.8		1.08
		20 C	(68 F)	5.3		1.09	6.9		1.09
		22 C (71.6 F)		5.7		1.12	7.4		1.12
		16 C (60.8 F)		4.4		1.10	5.8		1.10
45 C		18 C (64.4 F)		4.8		1.12	6.2		1.12
		19 C	(66.2 F)	4.9		1.14	6.4		1.14
(113 F)		19.4 C	(67 F)	5.0		1.15	6.5		1.15
		20 C	(68 F)	5.1		1.16	6.6		1.16
		22 C (71.6 F)		5.5		1.20	7.1		1.20
		16 C (60.8 F)		4.4		1.11	5.7		1.11
46 C		18 C (64.4 F)		4.7		1.14	6.1		1.14
		19 C	(66.2 F)	4.9		1.15	6.3		1.15
(115 F)		19.4 C	(67 F)	4.9		1.16	6.4		1.16
		20 C	(68 F)	5.0		1.17	6.5		1.17
		22 C (71.6 F)		5.4		1.21	7.0		1.21
		16 C (60.8 F)		4.2		1.16	5.5		1.16
50 C		18 C (64.4 F)		4.5		1.19	5.9		1.19
		19 C	(66.2 F)	4.7		1.21	6.1		1.21
(122 F)		19.4 C	(67 F)	4.7		1.22	6.2		1.22
		20 C	(68 F)	4.8		1.23	6.3		1.23
		22 C (71.6 F)		5.2		1.28	6.7		1.28
		16 C (60.8 F)		4.1		1.19	5.3		1.19
52 C		18 C (64.4 F)		4.4		1.22	5.7		1.22
		19 C	(66.2 F)	4.6		1.24	5.9		1.24
(125.5 F)		19.4 C	(67 F)	4.6		1.25	6.0		1.25
		20 C	(68 F)	4.7		1.26	6.1		1.26
		22 C (71.6 F)		5.1		1.31	6.6		1.31
Evaporator airflow (CMM)					16			17
Bypass factors					0.21			0.20
S.H.F. at rating conditions					0.68			0.75

Notes : 1. T.C. : Total capacity (kW) ... (kcal/h) = (kW) o 860, (Btu/h) = 4 o (kW) o 860

C.F. (T.I.) : Correction factors of Total input (Indoor unit input + Outdoor unit input)

2.(°F) = 32 + 9 / 5 (°C)

3.Guaranteed operation range (cooling) :

Lower limit ... Indoor : 21°C	(70°F)	DB, 15.5°C	(60°F) WB, Outdoor : 21°C (70°F) DB.
Upper limit ... Indoor : 35°C	(95°F)	DB, 22.5°C	(72.5°F) WB, Outdoor : 52°C (125.5°F) DB.

Cooling capacity correction factors 60Hz

	Service Ref.			Refrigerant piping length (one way)
		5m (16ft)	10m (33ft)	15m (49ft)	20m (66ft)	25m (82ft)	30m (98ft)	35m (115ft)	40m (131ft)
	PL-2KJB.UK	1.0	0.985	0.975	0.964	0.954	0.944	–	–
	PL-2.5KJB.UK	1.0	0.978	0.963	0.948	0.934	0.921	–	–

8

2. STANDARD OPERATION DATA

		Service Ref.				PL-1.6KJB.UK		PL-2KJB.UK								PL-2.5KJB.UK
		MODE				cooling		cooling			cooling				cooling			cooling
	Total	Capacity			W	3,800		5,600			5,400				6,500			7,000
		Input			kW	1.54		2.57			2.59				2.59			3.05
		Indoor unit Service Ref.				PL-1.6KJB.UK		PL-2KJB.UK								PL-2.5KJB.UK
	circuit	phase, Hz				1, 50		1, 50			1, 60				1, 50			1, 60
		Volts				220		220				220			220			220
	Electrical	Amperes				0.59		0.60			0.65				0.60			0.66
		Outdoor unit Service Ref.				PU-1.6VLJA2.UK		PU-2VJA2.UK			PU-2NJA1.UK			PU-2.5VJA2.UK			PU-2.5NJA1.UK
		phase, Hz				1, 50		1, 50			1, 60				1, 50			1, 60
		Volts				220		220				220			220			220
		Amperes				6.7		11.3			11.4				11.4			13.4
		Discharge pressure			Mpa·G	1.94		1.95			1.95				1.92			2.03
					(kgf/FG)	(19.8)		(19.9)			(19.9)				(19.6)			(20.7)
	circuit
		Suction pressure			Mpa·G	0.52		0.45			0.48				0.48			0.47
					(kgf/FG)	(5.3)		(4.6)			(4.9)				(4.9)			(4.8)
	Refrigerant
		Discharge temperature			C	62.3		75.9			63.6				74.3			83.4
		Condensing temperature			C	37.4		48.9			46.0				46.4			47.6
		Suction temperature			C	6.3		13.1				5.8			10.3			7.2
		Ref. pipe length			m	5		5				5			5			5
	side	Intake air temperature			DB C	27		27				27			27			27
	Indoor
					DB C	17.1		15.5			14.6				13.1			13.0
		Discharge air temperature
					WB C	19		19				19			19			19
	Outdoor side	Intake air temperature			DB C	35		35				35			35			35
					WB C	24		24				24			24			24
	The unit of pressure has been changed to Mpa based on the international SI system.
	The conversion factor is : 1(Mpa·G)=10.2(kgf/F·G)
	3. ADDITIONAL REFRIGERANT CHARGE (R-22......Kg(lbs))
	Service Ref.		Outdoor unit precharged (kg)							Refrigerant piping length (one way)
				(up to 20m)
							20m(66ft)			25m(82ft)			30m(98ft)			35m(115ft)		40m(131ft)
	PL-1.6KJB.UK		V...1.3					0			–		–			–		–
	PL-2KJB.UK		V...1.78, N...1.9					0		0.06(0.13)			0.12(0.26)			–		–
	PL-2.5KJB.UK		V...2.4, N...2.4					0		0.06(0.13)			0.12(0.26)			–		–

4. OUTLET AIR SPEED AND COVERAGE RANGE

				PL-1.6KJB.UK	PL-2KJB.UK	PL-2.5KJB.UK
	Standard	Air flow	CMM	15.0	16.0	17.0
		Coverage range	m	5.7	6.0	6.4
		Air speed	m/sec.	5.2	5.6	5.9
	ceiling	Air flow	CMM	16.0	17.0	18.0
		Air speed	m/sec.	5.6	5.9	6.3
	High	Coverage range	m	6.0	6.4	6.8
		Total width of discharge outlets	mm	0	0	0

w The air coverage range is the value up to the position where the air speed is 0.25 m/sec. when air is blown out horizontally from the unit at the Hi notch position.

The coverage range should be used only as a general guideline since it varies according to the size of the room and furniture inside the room.

9

5 OUTLINES AND DIMENSIONS

1.INDOOR UNIT

PL-1.6KJB.UK / PL-2KJB.UK / PL-2.5KJB.UK

partselectricalForNOTE1.box may be removed during servicing. When

powertheconnectingline and the control wire, provide enough length to

wires.electricthe

theinstallingWhenNOTE2.optional high-efficiency filter, the dimension

transomthebetweenand ceiling shall be more than 440mm. Also,when

optionaltheinstallingcasement, the dimension between the transom

morebeshallceilingand than 440m. (The optional highefficiency filter

installed.)bealsocan

pipeLiquid

pipeGas

hilterefficiency

435

135

45

Optional high-

660

Drainhole 25-VPconnection

Feedinghole

(Drainpump)

25~35 690~710 25~35

117

117

Ceiling hole

640

Suspension bolt pitch

Terminal block for control

Terminal block for remote controller

Drain hole

Terminal block for

power supply

117 117

660

Suspension bolt M10 or

W3/8

41 25

Suspensionboltpitch

53

507

54

25~35

690~710

25~35

Ceilinghole

loweredge

	2	Refrigerant pipe Ø15.88	Flared connection 5/8F
	1	Refrigerant pipe Ø9.52	Flared connection 3/8F
between the	the ceiling slab.	1.6/2/2.5KJ
Leave space of 10~15mm	top surface of the unit and		surface		panelDecorative	motorVane	vanesAuto-4
	293
			30
253			-2	54
			+3
	243
	115
			Ceiling
					466	intake hole
						Air
			Controlwire entry Power line entry		side	side
	65~80				Refrigerant piping	electric wire entry
Suspensionbolt

Airoutlethole

466

Airoutlethole

460

760

Unit : mm

	Intake grill opening/closing side		35
			66
			460 outlet hole 760
			Air

				grill
66			35
				Airintake

10

2. REMOTE CONTROLLER

Unit : mm (inch)

3

75		69
		3

		96.5				12(15/32)	Upper side wiring		12(15/32)
							arrangement
3		90.5			3	11.6
							opening	8	6
						3.6
TIMER	TEMP	TIMER/TEMP.	POWER	ON/OFF					46
12	29
11	28		COOL	LOUVER	-108(41/4)	-117(45/8)	83.5(3-9/32)
			ON
10	27		DRY	MODE
9	26		FAN	SELECT
8	25	UP	HIGH	FAN
7	24
			LOW	SPEED
6	23
5	22	DOWN
4	21
3	20		AUTO						9.2
2	19		STOP	TIMER				4.6
1	18		START	MODE
			MITSUBISHI ELECTRIC

108(4-1/4)

	117(4-5/8)		Fixing hole

Rear side wiring arrangememt opening

Remote controller cable installation

●For exposed remote controller cable installation

					Exposed remote controller
					cable
	TIMER	TEMP TIMER/TEMP.		POWER	ON/OFF
	12	29
	11	28		COOL	MODE
	10	27		DRY
					SELECT
	9	26		FAN
	8	25	UP	HIGH	FAN
	7	24
				LOW	SPEED
	6	23
	5	22	DOWN
	4	21		ON	LOUVER
	3	20		AUTO
	2	19		STOP	TIMER
	1	18		START	MODE

MITSUBISHI ELECTRIC

Cable connection is only from the top. (right, left and bottom not possible)

●For recessed remote controller cable installation

Remote controller cable

Conduit tube

(local arrangement)

Switch box

(local arrangement)

Set screw (match with switch box), local arrangement.

Note : The cable for the remote controller is 10m (32ft) and 12-core with connectors O.D. ø 5.8.

11

6			WIRING DIAGRAM
PL-1.6KJB.UK / PL-2KJB.UK / PL-2.5KJB.UK
SYMBOL			NAME	SYMBOL	NAME	SYMBOL	NAME
I.B			INDOOR CONTROLLER BOARD	CN50<I.B>	DRAIN SENSOR CONNECTOR	SW1<R.B>	ON/OFF SWITCH
MF			INDOOR FAN MOTOR	CN51<I.B>	MULTIPLE CONNECTOR	SW2<R.B>	MODE SWITCH
MV			VANE MOTOR	CN2A<I.B>	TRANSMISSION WIRES No.1 CONNECTOR	SW3<R.B>	FAN SPEED HIGH/LOW SWITCH
LS			LIMIT SWITCH	CN2B<I.B>	TRANSMISSION WIRES No.2 CONNECTOR	SW4<R.B>	VANE ON/OFF SWITCH
RT1			ROOM TEMPERATURE THERMISTOR (0°C/15k , 25°C/5.4k )	CN28<I.B>	TIME SHORTENING CONNECTOR	SW5<R.B>	DISPLAY SWITCH
RT2			INDOOR COIL THERMISTOR (0°C/15k , 25°C/5.4k )	CN2<I.B>	TIMER ADAPTOR CONNECTOR	SW6<R.B>	SET TEMPERATURE/TIMER UP SWITCH
DS			DRAIN SENSOR	SW1<I.B>	FUNCTION SWITCH	SW7<R.B>	SET TEMPERATURE/TIMER DOWN SWITCH
DP			DRAIN PUMP	SW2<I.B>	UNIT SWITCH	SW8<R.B>	TIMER MODE SWITCH
T			TRANSFORMER	SW3<I.B>	EMERGENCY OPERATION SWITCH	LD1<R.B>	RUN INDICATOR LED
C1			INDOOR FAN CAPACITOR	SWA<I.B>	HIGH CEILING, NOISE SAVING SWITCH	LD3<R.B>	COOLING INDICATORLED
TB2			POWER SUPPLY TERMINAL BLOCK	SWB<I.B>	NUMBER OF AIR OUTLETS SWITCH	LD4<R.B>	FAN MODE INDICATOR LED
TB4			INDOOR/OUTDOOR CONNECTING WIRE TERMINAL BLOCK	SWC<I.B>	OPTION SWITCH	LD5<R.B>	FAN HIGH INDICATOR LED
CND<I.B>			POWER SUPPLY CONNECTOR	X1<I.B>	DRAIN PUMP/D.HEATER RELAY	LD6<R.B>	VANE ON INDICATOR LED
FAN1<I.B>			FAN MOTOR CONNECTOR	X3<I.B>	VANE MOTOR RELAY	LD7<R.B>	INDICATOR MODE TEMPERATURE LED
CNV<I.B>			VANE MOTOR CONNECTOR	X4<I.B>	FAN MOTOR RALAY	LD8<R.B>	INDICATOR MODE TIMER LED
CNP<I.B>			DRAIN PUMP CONNECTOR	F1<I.B>	FUSE (6.3A)	LD9<R.B>	DRY INDICATOR LED
CN30<I.B>			INDOOR/OUTDOOR CONNECTING WIRE CONNECTOR	F2<I.B>	FUSE (6.3A)	LD10<R.B>	FAN LOW INDICATOR LED
CN120<I.B>			REMOTE CONTROLLER TRANSMISSION WIRE CONNECTOR	ZNR<I.B>	VARISTOR	LD11<R.B>	OFF TIMER INDICATOR LED
CN23<I.B>			VANE POSITION CONNECTOR	H	DEW PREVENTION HEATER	LD12<R.B>	ON TIMER INDICATOR LED
CN20<I.B>			INTAKE CONNECTOR	R.B	REMOTE CONTROLLER BOARD	LD13~24<R.B>	TEMPERATURE TIMER REMAINING TIME INDICATOR LED
CN21<I.B>			PIPE CONNECTOR	CNR120<R.B>	CONNECTOR (REMOTE CONTROLLER TRANSMISSION WIRE)

			RED ORN YLW
YLW YLW	BRN BRN	RED BLU	WHT YLW

	MF	C1 BLK	5				1 3	1 3		1 3	1	3
		WHT	3	FAN1			CNV	CNP		CND		CNT
			1							POWER
		RED		FAN			VANE	D.U.M.				TRANS
									F2	F1
													1
			X4				X3		X1				2
									ZNR				3
			X4				X3	X1				CN50 4
												DRAIN	5
			CN2B	CN2A									1
	1		TWIN2	TWIN1									2
			1 3	1 3 SW3	JR02 JR04 JR06			SWA	SWB	SWC	CN51
	2					SW1	SW2						3
	3			ON				3	2	OP	MULTIPLE		4
				OFF				2	3	STD
DS	4			123	JR01 JR03 JR05	12345678	12345	1	4				5
RT1
RT2	2
	1

				T
	RED			BRN
	14.5V AC		10.6V AC		12
	4	3	2	1
		CN4T			CN120
		TRANS			TO REMOCON

			1
CN2	3	CN30	3
	2		2
TIMER	1	OUTDOOR	1
CN21	1	CN23	1
PIPE	2	VANE	2
CN20	1	CN28	1
INTAKE	2	LINETEST	2

2
7
BLU	1
BLU	6

TB4

ORN 2

YLW 1

									Y
								SUPPL
						POWER			50Hz
						L	~(1PHASE)
						N		-240V
								220 60Hz
								220V
									CNR120
			YLW
			GRN/	TB2
									1
								LD1	SW
					LD7	5
				LD8					2
						SW		LD3	SW
		GRILL		LD13				LD9
								LD4		3
				LD14
									SW
			LS		LD15			LD5
					LD16			LD10		4
MV				12	LD17			6		SW
					LD18			SW	LD6
										8
					LD19
								SW	LD11	SW
					LD20
								7
	H2	5	10			LD21			LD12
						LD22
			R
						LD23
			N
		RN B				LD24
BRN		B
	DP
							.
N
						.B
BR						R

TO OUTDOOR UNIT

CONNECTING WIRES

DC 12V

	fig:1		SW1	SW1
	Indoor fan motor(MF) for 230,	240V	ON	ON
			OFF	OFF
			1 2 34 5 67 8	1 2 34 5 67 8
	NOTES:
	1.Since the indoor fan motor(MF) is connected with 220V power, using 230, 240V power will require a setting change of the
	dip switch(SW1<I.B>) on the indoor controller board showing fig:1.
	2.Since the indoor transformer(T) is connected with 220V power, if 230, 240V power is used. Change the wiring connection
	showing fig:3.
	3.Since the outdoor side electric wiring may change be sure to check the outdoor unit electric wiring for servicing.
	4.Symbols used in wiring diagram are the following.
	:Terminal block		:Connector

fig:2

MODELS

1.6KJ

2KJ

2.5KJ

ON ON ON SW1 OFF OFF OFF

1 2 34 5 67 8

1 2 34 5 67 8

1 2 34 5 67 8

[Emergency operation] If remote controller or microcomputer fails but there is no other trouble,emergency operation is possible by setting dip switch(SW3<I.B>) on the indoor controller board.

[Check items]

(1)Compressor and fan.

(2)Check the trouble position using self diagnostic function.

If the result of self diagnosis indicates protective device such as freeze protection is functioning emergency operation is not possible unless the cause is remove.

(3)Do not attempt emergency operation when drain pump fails(drain overflows).

(4)Emergency operation will be a continuous operation mode due to power ON/OFF. (ON/OFF with the remote controller is not possible.)

[Emergency operation procedure]

(1)Set the dip switch(SW3<I.B>) on the indoor controller board to 1 , 2 on and 3 off for cooling (2)Turn on the outdoor unit side circuit breaker, then the indoor unit side circuit breaker.

(3)During emergency operation indoor fan runs at high speed but auto-vane does not work. (4)Thermostat will not function.

(5)Emergency cooling should be limited to 10 hours maximam. (the indoor unit heat exchanger may freeze.)

12

7 REFRIGERANT SYSTEM DIAGRAM

PL-1.6KJB.UK, PL-2KJB.UK/PU-1.6VLJA2.UK,PU-2VJA2.UK,PU-2NJA1.UK

INDOOR UNIT

PL-1.6KJB.UK

PL-2KJB.UK

Indoor heat exchanger

Distributor

Flexible tube

Flared connection

OUTDOOR UNIT

Refrigerant pipe {15.88(5/8) (With insulator) option

Low pressure		Check	High pressure	PU-1.6
				PU-2
switch		plug	switch
Ball	Charge
valve	plug
			Strainer

Outdoor heat exchanger

Flared	Accumulator
connection	Compressor

	Capillary tube
	Ball valve
Refrigerant pipe {9.52(3/8)	(with service port)	: flow of refrigerant
(With insulator) option	wCapillary tube size
	PU-1.6(O.D.3.2oI.D.1.8-R900)
	PU-2 (O.D.3.2oI.D.2.0-R430)

PL-2.5KJB.UK/PU-2.5VJA2.UK,PU-2.5NJA1.UK

	Refrigerant pipe		15.88 (5/8)
PL-2.5KJB.UK	Flexible tube	Low pressure		High pressure	PU-2.5
		switch
				switch
	Ball		Charge	Check
	valve		plug	plug
	Flared			Strainer
Indoor heat	connection
exchanger					Outdoor heat
					exchanger

	Indoor coil	Flared	Accumulator
	thermistor
		connection
	RT2		Compressor	Capillary
	Distributor		Capillary tube for	tube
			injection
	with strainer

	Ball valve
Refrigerant pipe 9.52 (3/8)	(with service port)
	flow of refrigerant

(With insulator) option

wCapillary tube size

PU-2.5 (O.D.3.2oI.D.1.6-R760)o2pcs

13

8 OPERATION FLOW-CHART

Models : PL-KJB.UK 1. Main operation

	Start
1
NO	POWER SUPPLY
	Live
	YES
	<Note 1>
	TIMER MODE		YES
	button ON
	NO			During		NO
	<Note 2>
				operation
NO	ON/OFF			YES
	button ON
Protection device			AUTO STOP lamp ON			AUTO START lamp ON
Self hold reset	YES
			Auto stop timer			Auto start timer
STOP	<Note 3>		1	12Hr up/	press	1	12Hr up/	press
			12 1Hr down/		press	12 1Hr down/		press
YES	Abnormal
	operation mode		NO	Set time -			Set time -	NO
Protection device
	NO			Elapsed time=0			Elapsed time=0
Self hold
	POWER lamp ON			YES			YES
Self-diagnostic function
Indicate & Memory				STOP
EMERGENCY
ALL STOP
<Note 4>
<Note 5>
	MODE SELECT	DRY
	button
	COOL
	COOL OPERATION			DRY OPERATION

Note 1. Refer to page 21~22 for timer mode details.

Note 2. The unit starts operation by pressing the ON / OFF switch when unit is OFF. During operation, the unit stops operation by pressing the ON / OFF switch.

In addition, operation can be turned ON / OFF with the contralized remote controller or the remote switch. Note 3. The factors which cause "abnormal operation mode" are as follows.

●Outdoor unit abnormal operation.

●Fault of room temperature thermistor (RT1). ●Fault of indoor coil thermistor (RT2). ●Indoor coil frost protection mode.

●Drain water overflow prevention mode.

Refer to page 25 for abnormal operation mode details.

Note 4. The indoor fan runs on the low speed for 1 minute to eliminate remaining heat. Note 5. The compressor will not start for 3 minutes after the stop.

14