Mitsubishi PL-1.6KJC, PL-2KJC, PL-2.5KJC Service Manual

1997

SPLIT-TYPE, AIR CONDITIONERS

No. OC125

TECHNICAL & SERVICE MANUAL

Series PL Ceiling Cassettes

Indoor unit
[Model names]	[Service Ref.]
PL-1.6KJC	PL-1.6KJC
PL-2KJC	PL-2KJC
PL-2.5KJC	PL-2.5KJC

This manual does not cover the following outdoor units. When serving them, please refer to the service manual No.OC127 and this manual in a set.

<Service Ref.>

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

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
	4	21		ON	LOUVER
	3	20		AUTO
	2	19		STOP	TIMER
				START	MODE
	1	18

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

MITSUBISHI ELECTRIC

REMOTE CONTROLLER

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
		2	19		STOP	TIMER
		1	18		START	MODE
					MITSUBISHI ELECTRIC
	INDOOR UNIT	REMOTE CONTROLLER
Service	Cooling capacity (50/60Hz)
Ref.	W	Btu/h
PL-1.6KJC	3,800/ –	13,000/ –
PL-2KJC	5,600/5,400	19,100/18,400
PL-2.5KJC	6,500/7,000	22,200/23,900

Rating conditions (JIS B8616)

Indoor : 27°C (80°F) DB, 19°C (66°F)WB

Outdoor : 35°C (95°F) DB, 24°C (75°F)WB

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 fillter

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 (9kg lighter than the previous model) 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-1.6KJC

PL-2KJC

PL-2.5KJC

Horizontal Air Outlet

Sets airflow horizontal automatically during cooling or dehumidifying.

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

3 SPECIFICATIONS

1. STANDARD SPECIFICATIONS

		Service Ref.	PL-1.6KJC	PL-2KJC	PL-2.5KJC
	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-1.6KJC	PL-2KJC	PL-2.5KJC

		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	PU-2VJA2, PU-2NJA1	PU-2.5VJA2, PU-2.5NJA1
		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			w5	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) w5		Motor protector, Thermal switch, HP/LP switch.
Service Ref.	PL-1.6KJC / PL-2KJC / PL-2.5KJC
50Hz	1ph 220V/1ph 220V
60Hz	1ph 220V/1ph 220V

Rating conditions (JIS B 8616)

5

2. POWER SUPPLY & MODEL NAMES

Power supply				Model name (Outdoor unit)
		Service Ref. (Indoor unit)	PL-1.6KJC		PL-2KJC		PL-2.5KJC
	1ph.	220V	–		–		–
50Hz		220, 230, 240V	PU-1.6VLJA2		PU-2VJA2		PU-2.5VJA2
	3ph.	380/220V	–		–		–
		380/220, 400/230, 415/240V	–		–		–
60Hz	1ph.	220V	–		PU-2NJA1		PU-2.5NJA1
	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
Indoor unit Service Ref.			PL-1.6KJC	PL-2KJC	PL-2.5KJC	PL-1.6KJC	PL-2KJC	PL-2.5KJC
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	0.65	0.66	0.66	0.68	0.69	0.69
Outdoor unit Service Ref.			PU-1.6VLJA2	PU-2VJA2	PU-2.5VJA2	PU-1.6VLJA2	PU-2VJA2	PU-2.5VJA2
Power supply (1 Phase)				V : 240V 50Hz		N : 220V 60Hz
Indoor unit Service Ref.			PL-1.6KJC	PL-2KJC	PL-2.5KJC	PL-2KJC	PL-2.5KJC
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	0.70	0.72	0.72	0.72	0.73
Outdoor unit Service Ref.			PU-1.6VLJA2	PU-2VJA2	PU-2.5VJA2	PU-2NJA1	PU-2.5NJA1

(2). Rating conditions - SSA 385,386 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)			N : 220V 60Hz
Indoor unit Service Ref.			PL-2KJC		PL-2.5KJC
Current		A	0.65		0.66
Input		kW	0.14		0.14
Starting current		A	0.72		0.73
Outdoor unit Service Ref.			PU-2NJA1		PU-2.5NJA1

6

4 DATA

1. PERFORMANCE DATA

Cooling capacity 50Hz

Service Ref.					PL-1.6KJC			PL-2KJC			PL-2.5KJC
	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	5.5		0.81	6.6		0.81
21 C		18 C (64.4 F)		4.1		0.82	5.8		0.82	7.0		0.82
		19 C	(66.2 F)	4.2		0.83	5.9		0.83	7.2		0.83
(69.8 F)		19.4 C	(67 F)	4.3		0.83	6.0		0.83	7.3		0.83
		20 C	(68 F)	4.3		0.84	6.2		0.84	7.4		0.84
		22 C (71.6 F)		4.6		0.85	6.5		0.85	7.8		0.85
		16 C (60.8 F)		3.8		0.83	5.3		0.83	6.4		0.83
25 C		18 C (64.4 F)		4.0		0.85	5.7		0.85	6.8		0.85
		19 C	(66.2 F)	4.1		0.86	5.8		0.86	7.0		0.86
(77 F)		19.4 C	(67 F)	4.2		0.86	5.9		0.86	7.2		0.86
		20 C	(68 F)	4.3		0.87	6.0		0.87	7.3		0.87
		22 C (71.6 F)		4.5		0.88	6.4		0.88	7.8		0.88
		16 C (60.8 F)		3.6		0.90	5.1		0.90	6.2		0.90
30 C		18 C (64.4 F)		3.8		0.92	5.5		0.92	6.6		0.92
		19 C	(66.2 F)	4.0		0.93	5.6		0.93	6.8		0.93
(86 F)		19.4 C	(67 F)	4.0		0.93	5.8		0.93	6.8		0.93
		20 C	(68 F)	4.1		0.94	5.8		0.94	7.0		0.94
		22 C (71.6 F)		4.3		0.96	6.2		0.96	7.4		0.96
		16 C (60.8 F)		3.6		0.91	5.1		0.91	6.1		0.91
32.2 C		18 C (64.4 F)		3.8		0.93	5.4		0.93	6.5		0.93
		19 C	(66.2 F)	3.9		0.95	5.6		0.95	6.7		0.95
(90 F)		19.4 C	(67 F)	4.0		0.95	5.7		0.95	6.8		0.95
		20 C	(68 F)	4.1		0.96	5.8		0.96	7.0		0.96
		22 C (71.6 F)		4.3		0.98	6.2		0.98	7.4		0.98
		16 C (60.8 F)		3.5		0.97	4.9		0.97	5.9		0.97
35 C		18 C (64.4 F)		3.7		0.99	5.2		0.99	6.3		0.99
		19 C	(66.2 F)	3.8		1.00	5.4		1.00	6.5		1.00
(95 F)		19.4 C	(67 F)	3.8		1.01	5.5		1.01	6.6		1.01
		20 C	(68 F)	3.9		1.02	5.6		1.02	6.7		1.02
		22 C (71.6 F)		4.2		1.04	5.9		1.04	7.2		1.04
		16 C (60.8 F)		3.3		1.03	4.7		1.03	5.7		1.03
40 C		18 C (64.4 F)		3.6		1.05	5.1		1.05	6.1		1.05
		19 C	(66.2 F)	3.6		1.06	5.2		1.06	6.2		1.06
(104 F)		19.4 C	(67 F)	3.7		1.07	5.2		1.07	6.3		1.07
		20 C	(68 F)	3.8		1.08	5.3		1.08	6.4		1.08
		22 C (71.6 F)		4.1		1.12	5.8		1.12	7.0		1.12
		16 C (60.8 F)		3.3		1.03	4.7		1.03	5.7		1.03
40.6 C		18 C (64.4 F)		3.6		1.05	5.1		1.05	6.1		1.05
		19 C	(66.2 F)	3.6		1.06	5.2		1.06	6.2		1.06
(105 F)		19.4 C	(67 F)	3.7		1.07	5.2		1.07	6.3		1.07
		20 C	(68 F)	3.8		1.08	5.3		1.08	6.4		1.08
		22 C (71.6 F)		4.1		1.12	5.8		1.12	7.0		1.12
		16 C (60.8 F)		3.2		1.09	4.5		1.09	5.5		1.09
45 C		18 C (64.4 F)		3.4		1.12	4.8		1.12	5.8		1.12
		19 C	(66.2 F)	3.5		1.14	5.0		1.14	6.0		1.14
(113 F)		19.4 C	(67 F)	3.6		1.15	5.1		1.15	6.2		1.15
		20 C	(68 F)	3.7		1.16	5.2		1.16	6.3		1.16
		22 C (71.6 F)		3.9		1.20	5.5		1.20	6.6		1.20
		16 C (60.8 F)		3.2		1.10	4.5		1.10	5.4		1.10
46 C		18 C (64.4 F)		3.3		1.13	4.8		1.13	5.7		1.13
		19 C	(66.2 F)	3.5		1.15	5.0		1.15	6.0		1.15
(115 F)		19.4 C	(67 F)	3.6		1.16	5.1		1.16	6.1		1.16
		20 C	(68 F)	3.6		1.17	5.2		1.17	6.2		1.17
		22 C (71.6 F)		3.8		1.21	5.5		1.21	6.6		1.21
		16 C (60.8 F)		3.0		1.16	4.2		1.16	5.1		1.16
50 C		18 C (64.4 F)		3.2		1.19	4.5		1.19	5.5		1.19
		19 C	(66.2 F)	3.3		1.21	4.7		1.21	5.7		1.21
(122 F)		19.4 C	(67 F)	3.3		1.22	4.8		1.22	5.7		1.22
		20 C	(68 F)	3.4		1.23	4.9		1.23	5.9		1.23
		22 C (71.6 F)		3.6		1.28	5.2		1.28	6.2		1.28
		16 C (60.8 F)		2.9		1.18	4.2		1.18	5.0		1.18
52 C		18 C (64.4 F)		3.1		1.22	4.4		1.22	5.3		1.22
		19 C	(66.2 F)	3.2		1.24	4.6		1.24	5.5		1.24
(125.5 F)		19.4 C	(67 F)	3.3		1.25	4.6		1.25	5.6		1.25
		20 C	(68 F)	3.3		1.26	4.8		1.26	5.7		1.26
		22 C (71.6 F)		3.6		1.32	5.1		1.32	6.2		1.32
Evaporator airflow (CMM)					15			16			17
Bypass factors					0.31			0.19			0.10
S.H.F. at rating conditions					0.80			0.81			0.75

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

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-1.6KJC	1.0	0.992	0.987	0.982	–	–	–	–
	PL-2KJC	1.0	0.985	0.975	0.964	0.954	0.944	–	–
	PL-2.5KJC	1.0	0.983	0.972	0.961	0.951	0.940	–	–

7

Cooling capacity 60Hz

Service Ref.					PL-2KJC			PL-2.5KJC
	Temperature			T.C.		C.F.		T.C.		C.F.
Outdoor DB		Indoor WB				(T.I.)				(T.I.)
		16 C (60.8 F)		5.5		0.81		7.1		0.81
21 C		18 C (64.4 F)		5.8		0.82		7.5		0.82
		19 C	(66.2 F)	5.9		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)	6.2		0.84		8.0		0.84
		22 C (71.6 F)		6.5		0.85		8.4		0.85
		16 C (60.8 F)		5.3		0.83		6.9		0.83
25 C		18 C (64.4 F)		5.7		0.85		7.4		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		0.88		8.3		0.88
		16 C (60.8 F)		5.1		0.90		6.7		0.90
30 C		18 C (64.4 F)		5.5		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)	5.8		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)		5.1		0.91		6.6		0.91
32.2 C		18 C (64.4 F)		5.4		0.93		7.0		0.93
		19 C	(66.2 F)	5.6		0.95		7.2		0.95
(90 F)		19.4 C	(67 F)	5.7		0.95		7.4		0.95
		20 C	(68 F)	5.8		0.96		7.5		0.96
		22 C (71.6 F)		6.2		0.98		8.0		0.98
		16 C (60.8 F)		4.9		0.97		6.4		0.97
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		1.01		7.1		1.01
		20 C	(68 F)	5.6		1.02		7.2		1.02
		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)		5.1		1.05		6.6		1.05
		19 C	(66.2 F)	5.2		1.06		6.7		1.06
(104 F)		19.4 C	(67 F)	5.2		1.07		6.8		1.07
		20 C	(68 F)	5.3		1.08		6.9		1.08
		22 C (71.6 F)		5.8		1.12		7.5		1.12
		16 C (60.8 F)		4.7		1.03		6.1		1.03
40.6 C		18 C (64.4 F)		5.1		1.05		6.6		1.05
		19 C	(66.2 F)	5.2		1.06		6.7		1.06
(105 F)		19.4 C	(67 F)	5.2		1.07		6.8		1.07
		20 C	(68 F)	5.3		1.08		6.9		1.08
		22 C (71.6 F)		5.8		1.12		7.5		1.12
		16 C (60.8 F)		4.5		1.09		5.9		1.09
45 C		18 C (64.4 F)		4.8		1.12		6.2		1.12
		19 C	(66.2 F)	5.0		1.14		6.5		1.14
(113 F)		19.4 C	(67 F)	5.1		1.15		6.7		1.15
		20 C	(68 F)	5.2		1.16		6.8		1.16
		22 C (71.6 F)		5.5		1.20		7.1		1.20
		16 C (60.8 F)		4.5		1.10		5.8		1.10
46 C		18 C (64.4 F)		4.8		1.13		6.2		1.13
		19 C	(66.2 F)	5.0		1.15		6.4		1.15
(115 F)		19.4 C	(67 F)	5.1		1.16		6.6		1.16
		20 C	(68 F)	5.2		1.17		6.7		1.17
		22 C (71.6 F)		5.5		1.21		7.1		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)	4.8		1.22		6.2		1.22
		20 C	(68 F)	4.9		1.23		6.3		1.23
		22 C (71.6 F)		5.2		1.28		6.7		1.28
		16 C (60.8 F)		4.2		1.18		5.4		1.18
52 C		18 C (64.4 F)		4.4		1.22		5.7		1.22
		19 C	(66.2 F)	4.6		1.24		6.0		1.24
(125.5 F)		19.4 C	(67 F)	4.6		1.25		6.0		1.25
		20 C	(68 F)	4.8		1.26		6.2		1.26
		22 C (71.6 F)		5.1		1.32		6.7		1.32
Evaporator airflow (CMM)					16			17
Bypass factors					0.19			0.09
S.H.F. at rating conditions					0.76			0.79
Notes : 1. T.C. : Total capacity (kW) ... (kcal/h) = (kW) 860, (Btu/h) = 4 (kW) 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-1.6KJC	1.0	0.990	0.983	0.976	–	–	–	–
	PL-2KJC	1.0	0.985	0.975	0.964	0.954	0.944	–	–
	PL-2.5KJC	1.0	0.978	0.963	0.948	0.934	0.921	–	–

8

2. STANDARD OPERATION DATA

			Service Ref.				PL-1.6KJC						PL-2KJC									PL-2.5KJC
	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-1.6KJC						PL-2KJC									PL-2.5KJC
circuit	phase, Hz						1, 50				1, 50					1, 60				1, 50				1, 60
	Volts				V		220				220						220			220				220
Electrical	Amperes				A		0.59				0.60					0.65				0.60				0.66
	Outdoor unit Service Ref.						PU-1.6VLJA2				PU-2VJA2					PU-2NJA1			PU-2.5VJA2					PU-2.5NJA1
	phase, Hz				V		1, 50				1, 50					1, 60				1, 50				1, 60
	Volts				A		220				220						220			220				220
	Amperes						7.7				11.3					11.9				12.5				13.5
	Discharge pressure				Mpa.G		1.94				1.95						1.95			1.92				2.03
circuit					(kgf/F.G)		(19.8)				(19.9)					(19.9)				(19.6)				(20.7)
	Suction pressure				Mpa.G		0.52				0.45						0.48			0.48				0.47
					(kgf/F.G)		(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		8.3				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					WB C		19				19						19			19				19
	Discharge air temperature				DB C		17.1				15.5					14.6				13.1				13.0
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 converston factor is : 1(Mpa.G)=10.2(of/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-1.6KJC			V...1.3							0						–		–				–			–
PL-2KJC			V...1.78, N...1.9							0			0.06(0.13)					0.12(0.26)				–			–
PL-2.5KJC			V...2.4, N...2.4							0			0.06(0.13)					0.12(0.26)				–			–
4. OUTLET AIR SPEED AND COVERAGE RANGE
								PL-1.6KJC									PL-2KJC					PL-2.5KJC
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

10

25~35

Ceiling hole

25~35

690~710

640

25~35

Suspension bolt pitch

117

Note 1: For the installation of the optional humidifier(suspended type), it

requires minimum 360mm space between transom and ceiling.

pitch

Terminal block

117

Note 2: Electrical box may be removed for the service purpose. Make

sure to slack the electrical wire little bit for control/power wires

connection.

Ceilinghole

690~710

507

Suspensionbolt

Terminal block

660

for remote controller

Note 3: For the installation of the optional high efficiency filter or optional

Power terminal block

multiple casement, it requires minimum 440mm space between

transom and ceiling for the installation (Optional high

Drain water release hole

performance filter can be also installed).

25~35

77

64

186

68

117

13 117

660

Connect the attached

flexible pipe or socket.

Drain pipe

135

435

Suspension bolt M10

75

65

2

42

Connected to VP-25

Optional multifunctional casement

Inspection hole

Optional high performance filter

or W3/8

1

(Drain up machine)

154

145

253

298

Keep approximately

+3 -2

10 to 15mm space

54

65~80

115

between unit ceiling and ceilimg slab.

Suspension bolt lower edge

+3 -2

30

Control wire opening

Ceiling side

54

A

(Indication area)

Power switch wire opening

Wired panel

Refrigerant piping side

Wiring arrangement opening side

		A
760		460			Air outlet
		66
		35

Intake grille (Air intake)

466

Air intake

460

Air outlet

760

	Grill
	Vane motor		1 (Liquid)	2 (Gas)
	4-Auto vane	1/6/2/2.5	Refrigerant pipe {9.52	Refrigerant pipe {15.88
			Flaredconnection 3/8F	Flaredconnection 5/8F
	466 Air intake
	Intake grille opening closing side.
66	35

	.1
2KJC-PL / 6KJC.1-PL	UNIT INDOOR
5KJC.2-PL /

DIMENSIONS AND OUTLINES 5

2. REMOTE CONTROLLER

Unit : mm (inch)

3

75		69
		3

		96.5				12(15/32)	Upper side wiring		12(15/32)
						11.6	arrangement
3		90.5			3
						3.6	opening	8	6
TIMER	TEMP	TIMER/TEMP.	POWER	ON/OFF
12	29								46
11	28		COOL	MODE			9/32)-83.5(3
4	21		DRY		1/4)-108(4	5/8)-117(4
10	27			SELECT
9	26		FAN
8	25	UP	HIGH	FAN
7	24
			LOW	SPEED
6	23
5	22	DOWN
			ON	LOUVER
3	20		AUTO
2	19		STOP	TIMER				4.6	9.2
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 5m (16ft) and 12-core with connectors O.D. ø 5.8.

11

6			WIRING DIAGRAM
PL-1.6KJC / PL-2KJC / PL-2.5KJC
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 SELECTOR 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 INDICATOR LED
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 RELAY	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)

LB

MF

N

5 10

BRN

YLW

YLW

BRN BRN

BRN

BRN

RED

BLU

WHT

RED220V

ORN230V 240V

YLW

RED WHT BLK

DP

1 2 3

MV

C1

2 7

1 6 BLU

BLU

YLW

1 3 5

1 3

1 2

1 3

CND

FAN1

CNV

CNP

POWER

FAN

VAME

1 3

D.U.M

CNT

F2

F1

TARNS

T

RED BRN

14.5V AC

10.6V AC

4 3 2 1

CN4T

TARNS

X4				X1
	X3
X4	X3			X1	ZNR
											1
										CN50	2
										DRAIN	3
CN2B CN2A											4		CN21	1
											5
													PIPE	2
TWN1	TWN2							CN2	3		5
1 2	1 2 SW3												CN20	1
		JR02 JR04 JR06		SW1	SW2			TIMER	2	CN51	4
						3	2						INTAKE 2
						2	3	STD	1	MULTIPLE 3		GRY
	123JR01 JR03 JR05		1234567812345			1	4	OP			2		BLK
						SWA	SWB	SWC			1

L	POWER SUPPLY
N	~(1PHASE)
GRN/YLW	220-240V AC 50Hz
TB2	220V AC 60Hz

	12
	2	TO OUTDOOR UNIT
	1
		CONNECTING WIRES
	TB4	12V DC
	CN120
	TO.R.C

1

	CN30	3	ORN
	OUTDOOR 2
			YLW
		1
	CN23	2	BRN
	VANE	1
BLK	CN28	1	12
	LINE TEST 2

I.B

Service Ref.				SW1
PL-1.6KJC										ON
				12345678						OFF
PL-2KJC										ON
										OFF
				12345678
PL-2.5KJC										ON
										OFF
		12345678

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 (SW<I. B>) on the indoor controller board as shown in fig : 1.

fig : 1

SW1

SW1

Indoor fan motor (MF) for 230, 240V.

ON

ON

OFF

OFF

1 2 3 4 5 6 7 8

1 2 3 4 5 6 7 8

2.Since the indoor transformer (T) is connected with 220V power, using 230, 240V power will require a wiring connection change as shown in fig : 2.

fig : 2						RED
					220V
						ORANGE
When power supply is		230V			230V
						YELLOW
		240V			240V

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

4.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.

1 2 3 4				CNR120
		LD8 LD7
		LD13	SW5 LD1	SW1
			LD3
		LD14
			LD9	SW2
		LD15
	RT1 RT2	LD16	LD4
DS		LD17	LD5	SW3
		LD18	SW6 LD10
		LD19	LD6	SW4
		LD20
		LD21	SW7
		LD22	LD11	SW8
		LD23	LD12
		LD24

R.B.

[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 removed.

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

(4)Emergency operation will continuously run with power ON/OFF (ON/OFF with 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 outdoor unit side circuit breaker, then indoor unit side circuit breaker in this order.

(3)During emergency operation indoor fan runs at high speed but vane remains stop.

(4)Thermostat will not function.

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

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7 REFRIGERANT SYSTEM DIAGRAM

PL-1.6KJC / PU-1.6VLJA2, PL-2KJC / PU-2VJA2, PU-2NJA1

INDOOR UNIT

PL-1.6KJC

PL-2KJC

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-1.6JA
				PU-2JA
switch		plug	switch
Ball	Charge
valve	plug
			Strainer

Outdoor heat exchanger

Flared	Accumulator
connection	Compressor

Capillary tube for injection (Only PU-2)

Capillary tube

Refrigerant pipe {9.52(3/8) (With insulator) option

Ball valve
(with service port)	: flow of refrigerant
Capillary tube size
PU-1.6(O.D.3.2XI.D.1.8–R900)
PU-2 (O.D.3.2XI.D.2.0–R430)

PL-2.5KJC / PU-2.5VJA2, PU-2.5NJA1

INDOOR UNIT	Refrigerant pipe {15.88(5/8)				OUTDOOR UNIT
	(With insulator) option
	Flexible tube	Low pressure		Check plug	PU-2.5JA
PL-2.5KJC
		switch
		Ball	Charge	High
		valve	plug	pressure
				switch
	Flared
Indoor heat	connection				Outdoor heat
exchanger
					exchanger
	Flared	Accumulator			Strainer
Distributor	connection			Compressor
					Capillary tube
					PU-2.5
					(O.D.3.2XI.D.1.6–R760)
					x2pcs
		Ball valve
	Refrigerant pipe {9.52(3/8)	(with service port)			: flow of refrigerant
	(With insulator) option

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8 OPERATION FLOW-CHART

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 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.

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