Mitsubishi PLH-1.6KKHB.UK, PLH-2.5KKHB.UK, PLH-2KKHB.UK Service Manual

1997

SPLIT-TYPE, HEAT PUMP, AIR CONDITIONERS

No. OC147

TECHNICAL & SERVICE MANUAL

Series PLH Ceiling Cassettes

Indoor unit [Model names]

PLH-1.6KKHB

PLH-2KKHB

PLH-2.5KKHB

[Service Ref.]

PLH-1.6KKHB·UK PLH-2KKHB·UK PLH-2.5KKHB·UK

This manual does not cover the following outdoor units. When servicing them, please refer to the service manual No.OC150 and this manual in a set.

[Service Ref.] PUH-1.6VKA3·UK PUH-2VKA2·UK PUH-2.5VKA2·UK

INDOOR UNIT

FILTER

CHECK MODE

TEST RUN

CONTENTS
1.	FEATURES..........................................	2
2. PART NAMES AND FUNCTIONS ......		3
3.	SPECIFICATIONS...............................	6
4.	DATA ...................................................	9
5. OUTLINES AND DIMENSIONS........		13
6. WIRING DIAGRAM ...........................		15
7.	REFRIGERANT SYSTEM DIAGRAM .....	16
8. OPERATION FLOW-CHART ............		17
9. MICROPROCESSOR CONTROL.....		21
10. TROUBLESHOOTING ......................		43
11. 4-WAY AIR FLOW SYSTEM .............		51
12. SYSTEM CONTROL .........................		52
13. DISASSEMBLY PROCEDURE .........		57
14.	PARTS LIST......................................	60
15.	OPTIONAL PARTS ...........................	64

REMOTE CONTROLLER

The Slim Line.

From Mitsubishi Electric.

1 FEATURES

Series PLH Ceiling Cassettes

FILTER

CHECK MODE

TEST RUN

		Indoor unit	Remote controller
	Service Ref.	Cooling capacity/Heating capacity
		W	Btu/h
	PLH-1.6KKHB.UK	4,400/4,650[6,050]	15,000/15,900[20,600]
	PLH-2KKHB.UK	5,400/5,800[7,200]	18,400/19,800[24,600]
	PLH-2.5KKHB.UK	6,300/[7,200/9,300]	21,500/24,600[31,700]

1.PURSUING CONPACTNESS

(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 anoptimum 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. Adress 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 (Main) Unit

PLH-1.6KKHB·UK

PLH-2KKHB·UK

PLH-2.5KKHB·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

● Remote controller

Once the controls are set, the same operation mode can be repeated by simply pressing the ON/OFF button.

● Operation buttons

		button	button
	This switches between		This sets or switches the
	continuous operation and the		current time. start time and
	timer operation.		stop time.
	button
	Press this button to switch
	the cooler electronic dry
	(dehumidify) automatic and
	heater modes.
			FILTER
			CHECK MODE
			TEST RUN
	TEMP button
	This sets the room
	temparature The temparature
	setting can be performed in
	1°C units
	Setting range		4
	Cooler	19°C to 30°C
	Heater	17°C to 28°C
	This model name of the		button
	remote controller is indicated.		This switches the horizontal
			fan motion ON and OFF.
			(This button dose not operate in
			this model)

button

This sets the ventilation fan speed.

ON/OFF button

This switches between the operation and stop modes each time it is pressed. The lamp on this butoon lights during operation.

button

This adjusts the vertical angle of the ventilation.

FILTER button

This resets the filter service indication display.

CHECK-TEST RUN button

Only press this button to perform an inspection check or test operation. Do not use it for normal operation.

4

● Display

CENTRALLY CONTROLLED display

This indicates when the unit is controlled by optional features such as central control type remote controller.

display

The current time , start time and stop time can be displayed in tensecond intervals by pressing the time switch button. The start time or stop time is always displayed during the timer operation.

In this display example on the bottom left, a condition where all display lamps light is shown for explanation purposes although this differs from actual operation.

display

This displays the air direction.

display

This indicates when the continous operation and time operation modes are set.

It also display the time for the timer operation at the same time as when it is set.

OPERATION MODE display

This indicates the operation mode.

STANDBY display

This indicates when the standby mode is set from the time the sleep

operation starts until the heating air 240KA is discharged.

DEFROST display

This indicates when the defrost operation is performed.

CHECK display

display

This indicates when a malfunction has occurred in the unit which should

This displays the selected setting

be checked.

temperature.

	display
	The selected fan speed is displayed.
	display
	The temperature of the suction air is
	displayed during operation. The
FILTER	display range is 8° to 39°C. The
CHECK MODE	display flashes 8°C when the actual
TEST RUN	temperature is less than 8° and
	flashes 39°C when the actual
	temperature is greater than 39°C.
	Operation lamp
	This lamp lights during operation,
	goes off when the unit stops and
	flashes when amalfunction occurs.

display

This lamp lights when electricity is supplied to the unit.

FILTER Display

This lamp lights when the filter need to be cleaned.

CHECK MODE

display

TEST RUN

This display lights in the check mode or when a test operation is performed.

Caution

●Only the display lights when the unit is stopped and power supplied to the unit.

●When power is turned ON for the first time the (CENTRAL CTRL) display appears to go off momentarily but this is not a malfunction.

●When the central control remote control unit, which is sold separately, is used the ON-OFF button, button and TEMP button do not operate.

●“NOT AVAILABLE” is displayed when the k button are pressed.This indicates that this room unit is not equipped with the fan direction adjustment function and the louver function.

5

3		SPECIFICATIONS
					Service Ref.
Item
Function
Capacity					Btu/h
					W
Total input					kW
	Service Ref.
	Power supply(phase, cycle,voltage)
		Input			kW
		Running current			A
		Starting current			A
	External finish
UNIT	Heat exchanger				kW
		Fan motor output
		Fan(drive) x No.
INDOOR	Booster heater				kW
		Airflow(Low-High)			K/min(CFM)
		External static pressure			mmAq,Pa
	Operation control & Thermostat
	Noise level(Low-High)				dB(A)
	Cond. drain conn. O.D.				mm,(in.)
			W		mm,(in.)
	Dimensions		D		mm,(in.)
			H		mm,(in.)
	Weight				kg,(lbs)
	Service Ref.
	Power supply (phase, cycle, voltage)
		Input			kW
		Running current			A
		Starting current			A
	External finish
	Refrigerant control
	Compressor
UNIT		Model
		Motor output			kW
OUTDOOR		Fan(drive) x No.
		Starter type
		Protection devices
	Heat exchanger
		Fan motor output			kW
		Airflow			K/min(CFM)
	Defrost method
	Noise level				dB(A)
			W		mm,(in.)
	Dimensions		D		mm,(in.)
			H		mm,(in.)
	Weight				kg,(lbs)
PIPING	Refrigerant
		Charge			kg,(lbs)
REEFRIGERANT	Pipe size O.D.		Liquid		mm,(in.)
			Gas		mm,(in.)
	Connection method		Indoor side
			Outdoor side
	Between the indoor & outdoor unit		Height difference
			Piping length

	PLH-1.6KKHB.UK
Cooling		Heating
15,000		15,900[20,600]
4,400		4,650[6,050]
1.59		1.51[2.91]
	PLH-1.6KKHB.UK
	Single. 50Hz. 220-240V
0.15		0.10[1.50]
0.64		0.45[6.28]
0.70		0.50[6.63]

Galvanized sheets with gray heat insulation

Plate fin coil

Turbo fan (direct) x 1

0.030

13-16(460-565)

0(direct blow)

[1.4]

Remote controller & built-in

32-37

32(1-1/4)

UNIT : 660(26)	PANEL : 760(30)
UNIT : 660(26)	PANEL : 760(30)
UNIT : 253(10)	PANEL : 30(1-1/8)
UNIT : 20(44)	PANEL :3.7(8)

	PUH-1.6VKA3.UK
	Single. 50Hz. 220-240V
1.44		1.41
6.74		6.60

33

Munsell 5Y 7/1

Capillary tube

Hermetic

RH247VFC

1.2

Line start

Inner thermostat, High pressure switch

Plate fin coil

Propeller (direct) x1

0.065

45(1,590)

Reverse cycle

49

870(34-1/4)

295+24 (11-5/8 add 1)

650(25-5/8)

53(117)

R-22

2.2(4.8)

9.52 (3/8)

15.88(5/8)

Flared

Flared

Max. 40m

Max. 40m

6

Service Ref.

Item

Function

	Capacity			Btu/h
				W
	Total input			kW
		Service Ref.
		Power supply(phase, cycle,voltage)
		Input		kW
		Running current		A
		Starting current		A
		External finish
	UNIT	Heat exchanger		kW
		Fan motor output
		Fan(drive) x No.
	INDOOR	Booster heater		kW
		Airflow(Low-High)		K/min(CFM)
		External static pressure		mmAq,Pa
		Operation control & Thermostat
		Noise level(Low-High)		dB(A)
		Cond. drain conn. O.D.		mm,(in.)
			W	mm,(in.)
		Dimensions	D	mm,(in.)
			H	mm,(in.)
		Weight		kg,(lbs)
		Service Ref.
		Power supply (phase, cycle, voltage)
		Input		kW
		Running current		A
		Starting current		A
		External finish
		Refrigerant control
		Compressor
	UNIT	Model
		Motor output		kW
	OUTDOOR	Fan(drive) x No.
		Starter type
		Protection devices
		Heat exchanger
		Fan motor output		kW
		Airflow		K/min(CFM)
		Defrost method
		Noise level		dB(A)
			W	mm,(in.)
		Dimensions	D	mm,(in.)
			H	mm,(in.)
		Weight		kg,(lbs)
	PIPING	Refrigerant
		Charge		kg,(lbs)
	REEFRIGERANT	Pipe size O.D.	Liquid	mm,(in.)
			Gas	mm,(in.)
		Connection method	Indoor side
			Outdoor side
		Between the indoor & outdoor unit	Height difference
			Piping length

	PLH-2KKHB.UK
Cooling		Heating
18,400		19,800[24,600]
5,400		5,800[7,200]
2.34		2.32[3.72]
	PLH-2KKHB.UK
	Single. 50Hz. 220-240V
0.14		0.10[1.50]
0.65		0.45[6.28]
0.72		0.50[6.63]

Galvanized sheets with gray heat insulation

Plate fin coil

Turbo fan (direct) x 1

0.030

13-16(460-565)

0(direct blow)

[1.4]

Remote controller & built-in

32-37

32(1-1/4)

UNIT : 660(26)	PANEL : 760(30)
UNIT : 660(26)	PANEL : 760(30)
UNIT : 253(10)	PANEL : 30(1-1/8)
UNIT : 20(44)	PANEL :3.7(8)

	PUH-2VKA2.UK
	Single. 50Hz. 220-240V
2.20		2.22
9.86		9.95

45

Munsell 5Y 7/1

Capillary tube

Hermetic

NH38VMD

1.7

Line start

Inner thermostat, HP switch

Plate fin coil

Propeller (direct) x1

0.065

45(1590)

Reverse cycle

49

870(34-1/4)

295+24 (11-5/8 add 1)

650(25-5/8)

64(141)

R-22

2.2(4.8)

9.52 (3/8)

15.88(5/8)

Flared

Flared

Max. 40m

Max. 40m

7

Service Ref.

Item

Function

	Capacity			Btu/h
				W
	Total input			kW
		Service Ref.
		Power supply(phase, cycle,voltage)
		Input		kW
		Running current		A
		Starting current		A
		External finish
	UNIT	Heat exchanger		kW
		Fan motor output
		Fan(drive) x No.
	INDOOR	Booster heater		kW
		Airflow(Low-High)		K/min(CFM)
		External static pressure		mmAq,Pa
		Operation control & Thermostat
		Noise level(Low-High)		dB(A)
		Cond. drain conn. O.D.		mm,(in.)
			W	mm,(in.)
		Dimensions	D	mm,(in.)
			H	mm,(in.)
		Weight		kg,(lbs)
		Service Ref.
		Power supply (phase, cycle, voltage)
		Input		kW
		Running current		A
		Starting current		A
		External finish
		Refrigerant control
		Compressor
	UNIT	Model
		Motor output		kW
	OUTDOOR	Fan(drive) x No.
		Starter type
		Protection devices
		Heat exchanger
		Fan motor output		kW
		Airflow		K/min(CFM)
		Defrost method
		Noise level		dB(A)
			W	mm,(in.)
		Dimensions	D	mm,(in.)
			H	mm,(in.)
		Weight		kg,(lbs)
	PIPING	Refrigerant
		Charge		kg,(lbs)
	REEFRIGERANT	Pipe size O.D.	Liquid	mm,(in.)
			Gas	mm,(in.)
		Connection method	Indoor side
			Outdoor side
		Between the indoor & outdoor unit	Height difference
			Piping length

	PLH-2.5KKHB.UK
Cooling		Heating
21,500		24,600[31,700]
6,300		7,200[9,300]
2.60		2.33[4.43]
	PLH-2.5KKHB.UK
	Single. 50Hz. 220-240V
0.14		0.10[2.20]
0.61		0.45[9.20]
0.67		0.50[9.55]

Galvanized sheets with gray heat insulation

Plate fin coil

Turbo fan (direct) x 1

0.030

14-17(495-600)

0(direct blow)

[2.1]

Remote controller & built-in

35-39.5

32(1-1/4)

UNIT : 660(26)	PANEL : 760(30)
UNIT : 660(26)	PANEL : 760(30)
UNIT : 253(10)	PANEL : 30(1-1/8)
UNIT : 21(46)	PANEL :3.7(8)

	PUH-2.5VKA2.UK
	Single. 50Hz. 220-240V
2.46		2.23
10.68		9.78

52

Munsell 5Y 7/1

Capillary tube

Hermetic

NH41VMD

2.0

Line start

Inner thermostat, HP switch

Plate fin coil

Propeller (direct) x1

0.085

50(1764)

Reverse cycle

52

870(34-1/4)

295+24 (11-5/8 add 1)

850(34-1/4)

68(150)

R-22

2.8(6.2)

9.52 (3/8)

15.88(5/8)

Flared

Flared

Max. 50m

Max. 50m

8

4				DATA
1. PERFORMANCE DATA
1) COOLING CAPACITY
						Indoor													Outdoor intake air DB C
	Service Ref.						intake	20						25				30								35		40								45
							air
							WB C		CA		P.C.			CA			P.C.		CA		P.C.			CA			P.C.		CA		P.C.			CA			P.C.
						16		4,439			1.27			4,317			1.33	4,159			1.43			3,990			1.53	3,812			1.64			3,624			1.74
	PLH-1.6KKHB.UK					18		4,726			1.30			4,602			1.36	4,434			1.46			4,258			1.57	4,074			1.68			3,882			1.79
						20		5,017			1.32			4,899			1.38	4,724			1.50			4,542			1.61	4,352			1.72			4,154			1.84
						22		5,310			1.35			5,209			1.41	5,028			1.53			4,840			1.65	4,645			1.77			4,442			1.90
						16		5,448			1.88			5,299			1.96	5,104			2.11			4,897			2.26	4,678			2.41			4,447			2.56
	PLH-2KKHB.UK					18		5,800			1.91			5,648			2.00	5,442			2.15			5,226			2.31	5,000			2.47			4,764			2.63
						20		6,157			1.95			6,012			2.04	5,798			2.20			5,574			2.37	5,341			2.54			5,099			2.71
						22		6,517			1.99			6,392			2.08	6,171			2.25			5,940			2.42	5,700			2.61			5,451			2.80
						16		6,356			2.08			6,182			2.17	5,955			2.34			5,713			2.51	5,472			2.68			5,207			2.85
	PLH-2.5KKHB.UK					18		6,767			2.13			6,589			2.22	6,349			2.39			6,097			2.57	5,841			2.74			5,571			2.92
						20		7,183			2.17			7,014			2.26	6,764			2.45			6,503			2.63	6,232			2.82			5,954			3.01
						22		7,603			2.21			7,458			2.31	7,199			2.50			6,930			2.69	6,645			2.90			6,359			3.11
Note CA:Capacity (W)
		P.C.:Power consumption (kW)
Cooling capacity correction factors
		Service Ref.															Refrigerant piping length(one way)
							5m		10m				15m				20m		25m				30m				35m		40m				45m				50m
	PLH-1.6KKHB.UK						1.00		0.993				0.984				0.978		0.969				0.961			0.956			0.948				—				—
	PLH-2KKHB.UK						1.00		0.992				0.983				0.978		0.966				0.959			0.950			0.945				—				—
	PLH-2.5KKHB.UK						1.00		0.989				0.980				0.970		0.960				0.950			0.940			0.930			0.920				0.910

Cooling performance curve(50Hz)

TOTAL INPUT (RATIO) CAPACITY (RATIO)

1.4
1.0					22
					20
0.8					18
					16
0.6
1.4
1.2					22
					20
					18
1.0					16
0.8
0.6
0.4
-5	5	15	25	35	46
1.2		OUTDOOR DB(°C)			INDOOR WB(°C)

INDOOR WB(°C)

9

2) HEATING CAPACITY

		Indoor													Outdoor intake air WB C
Service Ref.			intake
				-10						-5				0							5		10								15
			air
			DB C		CA		P.C.			CA			P.C.		CA		P.C.			CA		P.C.		CA		P.C.			CA			P.C.
		15		3,184			1.03			3,650			1.14	4,160			1.25			4,714		1.38	5,312			1.51			5,952			1.64
PLH-1.6KKHB.UK		20		3,049			1.11			3,506			1.23	4,003			1.35			4,538		1.48	5,112			1.62			5,724			1.77
		25		2,930			1.18			3,364			1.31	3,844			1.44			4,370		1.59	4,942			1.74			5,560			1.90
		15		3,972			1.58			4,552			1.75	5,188			1.93			5,880		2.11	6,625			2.31			7,424			2.52
PLH-2KKHB.UK		20		3,803			1.71			4,373			1.89	4,993			2.08			5,661		2.28	6,376			2.49			7,139			2.71
		25		3,655			1.81			4,196			2.01	4,795			2.22			5,451		2.44	6,165			2.67			6,935			2.91
		15		4,931			1.59			5,651			1.76	6,441			1.93			7,299		2.12	8,225			2.32			9,216			2.53
PLH-2.5KKHB.UK		20		4,721			1.71			5,429			1.89	6,198			2.09			7,027		2.29	7,916			2.50			8,863			2.73
		25		4,537			1.82			5,209			2.02	5,952			2.23			6,767		2.45	7,653			2.68			8,609			2.92
Note CA:Capacity (W)
P.C.:Power consumption (kW)
Heating capacity correction factors
Service Ref.													Refrigerant piping length(one way)
			5m		10m				15m				20m		25m				30m			35m		40m				45m				50m
PLH-1.6KKHB.UK			1.00		1.00				1.00				1.00		1.00				1.00		0.998			0.995				—				—
PLH-2KKHB.UK			1.00		1.00				1.00				1.00		1.00				1.00		0.998			0.995				—				—
PLH-2.5KKHB.UK			1.00		1.00				1.00				1.00		1.00				1.00		0.998			0.995			0.993				0.990

Heating performance curve(50Hz)

CAPACITY (RATIO)

TOTAL INPUT (RATIO)

1.4										15
										20
1.2										25INDOOR DB ( C)
1.0
0.8
0.6
1.4										25INDOOR DB ( C)
1.2
										20
										15
1.0
0.8
0.6
0.4
				0		5 10 15
-12-10 -5

OUTDOOR WB( C)

10

2. ELECTRICAL DATA

Indoor unit 220V 50Hz 1phase

Outdoor unit 220V 50Hz 1phase

	Service Ref.		Indoor unit	PLH-1.6KKHB.UK		PLH-2KKHB.UK		PLH-2.5KKHB.UK
			Outdoor unit	PUH-1.6VKA3.UK		PUH-2VKA2.UK		PUH-2.5VKA2.UK
	Mode			Cool	Heat	Cool	Heat	Cool	Heat
	Capacity (W)			4,300	4,550[5,720]	5,300	5,700[6,870]	6,200	6,900[8,660]
	Total Input (kW)			1.48	1.40[2.57]	2.24	2.22[3.39]	2.53	2.25[4.01]
	unit	Input (kW)		0.12	0.08[1.25]	0.12	0.08[1.25]	0.12	0.09[1.85]
	Indoor	Current (A)		0.60	0.41[5.75]	0.61	0.42[5.76]	0.57	0.42[8.44]
		Starting current (A)		0.66	0.45[6.14]	0.67	0.46[6.14]	0.63	0.46[8.79]
	unit	Input (kW)		1.36	1.32	2.12	2.14	2.41	2.16
	Outdoor
		Starting current (A)		30	30	43	43	52	52
		Current (A)		6.79	6.59	9.83	9.93	11.18	10.02

Indoor unit 230V 50Hz 1phase

Outdoor unit 230V 50Hz 1phase

	Service Ref.		Indoor unit	PLH-1.6KKHB.UK		PLH-2KKHB.UK		PLH-2.5KKHB.UK
			Outdoor unit	PUH-1.6VKA3.UK		PUH-2VKA2.UK		PUH-2.5VKA2.UK
	Mode			Cool	Heat	Cool	Heat	Cool	Heat
	Capacity (W)			4,350	4,600[5,890]	5,350	5,750[7,040]	6,250	7,050[8,980]
	Total Input (kW)			1.54	1.45[2.74]	2.29	2.27[3.56]	2.57	2.29[4.22]
	unit	Input (kW)		0.14	0.09[1.38]	0.13	0.09[1.38]	0.13	0.09[2.02]
	Indoor	Current (A)		0.62	0.43[6.02]	0.63	0.44[6.03]	0.59	0.43[8.82]
		Starting current (A)		0.68	0.47[6.39]	0.69	0.48[6.39]	0.65	0.47[9.19]
	unit	Input (kW)		1.40	1.36	2.16	2.18	2.44	2.20
	Outdoor
		Starting current (A)		32	32	44	44	52	52
		Current (A)		6.76	6.57	9.78	9.87	10.94	9.86

Indoor unit 240V 50Hz 1phase

Outdoor unit 240V 50Hz 1phase

	Service Ref.		Indoor unit	PLH-1.6KKHB.UK		PLH-2KKHB.UK		PLH-2.5KKHB.UK
			Outdoor unit	PUH-1.6VKA3.UK		PUH-2VKA2.UK		PUH-2.5VKA2.UK
	Mode			Cool	Heat	Cool	Heat	Cool	Heat
	Capacity (W)			4,400	4,650[6,050]	5,400	5,800[7,200]	6,300	7,200[9,300]
	Total Input (kW)			1.59	1.51[2.91]	2.34	2.32[3.72]	2.60	2.33[4.43]
	unit	Input (kW)		0.15	0.10[1.50]	0.14	0.10[1.50]	0.14	0.10[2.20]
	Indoor	Current (A)		0.64	0.45[6.28]	0.65	0.45[6.28]	0.61	0.45[9.20]
		Starting current (A)		0.70	0.50[6.63]	0.72	0.50[6.63]	0.67	0.50[9.55]
	unit	Input (kW)		1.44	1.41	2.20	2.22	2.46	2.23
	Outdoor
		Starting current (A)		33	33	45	45	52	52
		Current (A)		6.74	6.60	9.86	9.95	10.68	9.78

11

3. STANDARD OPERATION DATA

	Service Ref.		PLH-1.6KKHB.UK			PLH-2KKHB.UK			PLH-2.5KKHB.UK
Mode			Cooling		Heating	Cooling		Heating	Cooling		Heating
Total	Capacity	W	4,400		4,650	5,400		5,800	6,300		7,200
	Input	kW	1.59		1.51	2.34		2.32	2.60		2.33
	Indoor unit Service Ref.		PLH-1.6KKHB.UK			PLH-2KKHB.UK			PLH-2.5KKHB.UK
	Phase,Hz			1,50			1,50			1,50
circuit
	Volts	V		240			240			240
Electrical	Amperes	A	0.64		0.45	0.65		0.45	0.61		0.45
	Phase,Hz			1,50			1,50			1,50
	Outdoor unit Service Ref.		PUH-1.6VKA3.UK			PUH-2VKA2.UK			PUH-2.5VKA2.UK
	Volts	V		240			240			240
	Amperes	A	6.74		6.60	9.86		9.95	10.68		9.78
	Discharge pressure	MPa·G	1.80		1.70	1.90		1.94	1.95		1.71
		(O/F·G)	(18.3)		(17.3)	(19.3)		(19.7)	(19.8)		(17.4)
circuit
	Suction pressure	MPa·G	0.54		0.40	0.46		0.34	0.50		0.36
		(O/F·G)	(5.51)		(4.08)	(4.69)		(3.47)	(5.1)		(3.67)
Refrigerant	Discharge temperature	C	78.7		77.2	84.0		86.4	82.8		76.0
	Condensing temperature	C	48.5		—	50.7		—	51.8		—
	Suction temperature	C	8.5		0.7	4.8		–1.8	6.7		–1.5
	Ref. pipe length	m	5		5	5		5	5		5
side	Intake air temperature	DB C	27		20	27		20	27		20
Indoor		WB C	19		15	19		15	19		15
	Discharge air temperature	DB C	16.1		35.2	15.0		39.4	13.8		41.2
Outdoor side		WB C	24		6	24		6	24		6
	Intake air temperature	DB C	35		7	35		7	35		7
	SHF		0.83		—	0.76		—	0.75		—
	BF		0.21		—	0.21		—	0.14		—

The unit of pressure has been changed to Mpa on the international system of unit (SI unit system.) The converted score against the traditional unit system can be gotten according to the formula below.

1 (Mpa·G)=10.2(O/F·G)

4. OUTLET AIR SPEED AND COVERAGE RANGE

		Service Ref.		PLH-1.6KKHB.UK	PLH-2KKHB.UK	PLH-2.5KKHB.UK
	Standard	Air flow	m3/min	16.0	16.0	17.0
		Air speed	m/sec.	5.6	5.6	5.9
		Coverage range	m	6.0	6.0	6.4
	ceiling	Air flow	m3/min	17.0	17.0	18.0
		Air speed	m/sec.	5.9	5.9	6.3
	High
		Coverage range	m	6.4	6.4	6.8
		Total width of dischsrge outlets	mm	0	0	0

wThe air coverage range is the value up to the position where the air speed is 0.25m/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 the furniture inside the room.

12

5 OUTLINES AND DIMENSIONS

1.INDOOR UNIT PLH-1.6KKHB.UK PLH-2KKHB.UK PLH-2.5KKHB.UK

partselectricalForNOTE1.box may be removed during servicing. When

linepowertheconnectingand the control wire, provide enough length to

wires.electricthe theinstallingWhenNOTE2.optional high-efficiency filter, the dimension

andtransomthebetweenceiling shall be more than 440mm. Also,when

casement,optionaltheinstallingthe dimension between the transom

morebeshallceilingandthan 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 {15.88	Flared connection 5/8F
	1	Refrigerant pipe {9.52	Flared connection 3/8F
between the	the ceiling slab.	1.6/2/2.5KK
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

13

2. REMOTE CONTROLLER					Unit : mm (inch)

FILTER	FILTER
CHECK MODE	CHECK MODE
TEST RUN	TEST RUN

120

18

130

Rear side wiring arrangement opening.

83.5

46

CAUTION

SW18

SW17

14

6			WIRING DIAGRAM
PLH-1.6KKHB·UK/PLH-2KKHB·UK/PLH-2.5KKHB·UK
SYMBOL				NAME	SYMBOL	NAME	SYMBOL	NAME
R.B				REMOTE CONTROLLER BOARD	CN2L<I.B>	LOSSNAY CONNECTOR	X3<I.B>	VANE MOTOR RELAY
SW17<R.B>				ADDRESS SELECTOR	CN51<I.B>	CENTRALLY CONTROL CONNECTOR	X4<I.B>	FAN MOTOR RELAY
SW18<R.B>				FUNCTION SELECTOR	FAN2<I.B>	EMERGENCY OPERATION CONNECTOR	F1<I.B>	FUSE (6.3A)
CN1<R.B>				PROGRAM TIMER CONNECTOR	F.C<I.B>	FAN PHASE CONTROL	LED1<I.B>	DC 12V POWER LED
CN2<R.B>				REMOTE SWITCH CONNECTOR	SW1<I.B>	MODE SELECTOR	LED2<I.B>	DC 5V POWER LED
MV				VANE MOTOR	SW2<I.B>	ADDORESS SELECTOR	CNP<I.B>	DRAIN PUMP CONNECTOR
LS				LIMIT SWITCH	SW3<I.B>	EMERGENCY OPERATION SWITCH	CN50<I.B>	DRAIN SENSOR CONNECTOR
H2				DEW PREVENTION HEATER	SW5, SW7<I.B>	MODEL SELECTOR	DP	DRAIN PUMP
RT1				ROOM TEMP. THERMISTOR(0°C/15K ,25°C5.4K )	SW6<I.B>	TWIN, TRIPLE SWITCH	DS	DRAIN SENSOR
RT2				INDOOR COIL THERMISTOR(0°C/15K ,25°C5.4K )	SWA<I.B>	HIGH SEILING, NOISE SAVING SELECTOR	H1	HEATER
T				TRANSFORMER	SWB<I.B>	NUMBER OF AIR OUTLETS SELECTOR	FS1,2	THERMAL FUSE
MF				INDOOR FAN MOTOR	SWC<I.B>	OPTION SELECTOR	26H	HEATER THERMAL SWITCH
C1				FAN MOTOR CAPACITOR	ZNR<I.B>	VARISTOR	88H	HEATER CONNECTOR
TB2~6				TERMINAL BLOCK	X1<I.B>	DRAIN PUMP/D.HEATER RELAY	CNV<I.B>	VANE MOTOR CONNECTOR
I.B				INDOOR CONTROLLER BOARD
										SUPPLY
								POWER 50Hz
								L	~(1PHASE)
									-240V
								N	220	60Hz
									220V

RED ORN YLW

T

YLW

YLW

BRN

BRN

RED BLU

RED

YLW

RED

BRN

5

1

3

1 3

1

3

1 3

14.2V AC

11.1V AC

MF

C1

BLK

4 3

2 1

WHT

3

FAN1

CNV

CNP

CND

CNT

LED2

RED

1

FAN

VANE

D.U.M.

F1

POWER

TRANS

CN4T

5V POWER

TRANS

F.C

X4

1

CN22

1

X3

X1

2

1

TO REMOCON

2

3

CN40

2

1

ZNR

4

X4

SW7

SW3 SWC

X3

X1

CN50

REMOCON

CN30

1

3 5

5

POWER

3

2

Showing

OP

DRAIN

4

OUTDOOR

3

FAN2

STD

LED1

CN51

1

CN41

123 fig:1

12

1

1

1

12V POWER

CONTROLCENTRALLY 2

1

CN21

CN23

2

SW2

SW5

SW6

SW1

SWA

SWB

CN24

3

2

PIPE

2

VANE

2

ON

3

3

2

4

3

1

1

2

3

HEATER

CN20

CN2L

4

OFF

1

4

5

4

2

2

DS

123456

1234

1234

12345678910

INTAKE

LOSSNAY

RT1

RT2

2

1

*PLH-1.6,2,2.5KKHB(with heater)

HEATER

RED 3

88H 5

RED FS1

FS2

H1

CN24

POWER SUPPLY

TB2

BLU

1 BLU

L

3

YLW 6

1

YLW

26H

~(1PHASE)

N

1

220-240V

88H

YLW

2 YLW

50Hz

GRN/YLW

TB2

		1	18
			SW	OFF
	.	2		ON
.B
R

	2
	7
LU
B	1
	LU
B 6

	GRILL
		LS
MV
H2	5	10
	N
N R
	R B
N	B
BR
DP
N
BR

DC12V				CN2					TB6
				1	2						SW		ON
						3					17		OFF
	WIRES						CN
								1		5
								3	4
							2
	TRNSMISSION				1
												OUTDOOR
												UNIT
											DC12V			1
	1													2
											WIRES
BLU	2						TRNSMISSION							3
BLU
			1											TB3
		BRN		2										1
											BG79Y408H0
		YLW
		ORN		3
					TB4

fig:1

MODELS	1.6KK	2KK	2.5KK
SW7	ON	ON	ON
	OFF	OFF	OFF
	1 2 3	1 2 3	1 2 3

NOTES :

1. Since the indoor transformer (T)is connected with 240Vpower. If 220, 230v power is used. change the wiring connection showing fig: w2

							240V	YELLOW
	fig:w2
							230V	ORANGE
When power supply is		230V					220V	RED
		220V

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

3.Indoor and outdoor connecting wires are made with polarities. make wiring matching terminal numbers.

4.Symbols used in wiring diagram above are. / : Terminal block, : Connector.

5.Emergency operation

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

[Check items]

(1)Make sure that no other trouble exists the outdoor unit. Trouble with the outdoor unit prevents emergency operation.

(If any trouble exists the outdoor unit error code “P8”will be displayed on the remote controller and the trouble position will be shown on the outdoor controller board LED. See electric wiring diagram of the outdoor unit for details.)

(2)Make sure that there is no trouble with the indoor fan.

Emergency operation will be continuous run with the power ON/OFF (ON/OFF with the remote controller is not possible). [Emergency operation procedure]

(1)Switch the fan connector on the indoor controller board from FAN 1 to FAN 2.

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

(4)During emergency operation indoor fan runs at High speed but auto-vane does not work.

(5)Thermostat will not function. Cold air blows out for defrosting during heating thus do not operate defrosting for a long time. (6)Emergency cooling should be limited to 10 hours maximum. (the indoor unit heat exchanger may freeze).

(7)After every operation, switch the fan connector to FAN1, and set all dip switches (SW3<I.B>) to OFF.

NOTE: If the drain water lift up mechanism is identified to be defective with the microcomputer doctor during cooling, do not use emergency operation (it causes drain overflow)

15

7 REFRIGERANT SYSTEM DIAGRAM

PLH-1.6KKHB·UK/PUH-1.6VKA3·UK PLH-2KKHB·UK/PUH-2VKA2·UK PLH-2.5KKHB·UK/PUH-2.5VKA2·UK

Unit : mm

Flow of refrigerant (cooling)

Flow of refrigerant (heating)

High pressure

control switch

Oil separator

		Refrigerant pipe		4-way valve	Service	Outdoor unit
Indoor unit		(option)			port	Outdoor heat exchanger
		15.88mm(	5/8")	Ball valve
		(with heat insulator)		Strainer
		Flexible tube
Indoor				Service			Outdoor coil
heat				port
							thermistor
exchanger
							(TH)
	Strainer	Flared				Bypass
		connection
						valve	w
				Accumulator
						Restrictor	Capillary
Indoor coil	Restrictor					valve	tube
					Compressor
thermistor	valve
(RT2)

Distributor		Refrigerant pipe		Ball valve
with
		(option)		(with service port)
strainer
	Capillary	9.52mm(	3.8")
		(with heat insulator)
	tube

PLH-1.6 (O.D.3.2 I.D.1.6 –R630) PLH-2.5 (O.D.3.2 I.D.1.8 –R430) PLH-2 (O.D.3.2 I.D.1.8 –R630)

Strainer

wPLH-1.6 (O.D.3.2 I.D.1.8 –R400) PLH-2 (O.D.4.0 I.D.2.0 –R430) PLH-2.5 (O.D.4.2 I.D.2.4 –R1550)

High pressure protect switch

	Refrigerant flow in cooling	R.V.coil
		Heating ON
	Refrigerant flow in heating
		Cooling OFF

16

8 OPERATION FLOW-CHART

MAIN OPERATION

START
Power circuit	NO
breaker

1 YES

YES Check SW

ON twice

NO

w1

Operation

SW

YES

ON

NO

“OFF” timer

YES

NO

NO

Set

time

NO

“ON” timer

complete

YES

YES

Set time

YES

complete

w2

NO

Trouble

NO

		YES	Remote controller
			operation display
	STOP	Trouble STOP	Operating mode	YES
			(COOL)
	PROTECTION DEVICE	PROTECTION DEVICE	NO	COOL operation
	SELF HOLD RELEASE	SELF HOLD		YES
			Operating mode
		w3
	Remote controller		(DRY)
		Remote controller
	indicator lamp OFF			DRY operation
		trouble display	NO
			Operating mode	YES
			(HEAT)
	Indoor side		NO	HEAT operation
		w4
			w6	YES
	Fan STOP
			Operating mode
			(FAN)	w7
	Auxiliary heater OFF		NO	FAN operation
			Auto COOL/HEAT
			operation

Outdoor side

w5

Compressor OFF

Fan STOP

Four-way valve OFF

w1 In addition, the centralized control and remote control can be operated. w2 The modes which indicate the sources of trouble are listed below.

●EO-Signal transmitting/receiving error

●P1-Room temperature thermistor malfunction

●P2-Indoor coil thermistor malfunction

●P4-Drain sensor malfunction

●P5-Drain overflow

●P6-Coil frost/overheat protection

●P7-System error

●P8-Outdoor unit trouble

w3 The CHECK swich will show if an error has occurred in the past. w4 Fan runs on low speed for 1 minute in order to remove overheat air.

w5 The 3-minute (6 minutes … heating mode) time-delay functions after compressor stops. w6 FAN or AUTO mode is selected by the indoor dipswitch setting.

w7 In FAN mode, fan speed and vane operation depend on the remote controller setting. (Compressor is OFF.)

17

COOLING OPERATION

COOL operation

Four-way valve/OFF

NO		Initial
		COOLING
	w8		YES
	Vane initial
		setting
NO		Vane
	55 deg downward angle
	70 deg downward angle
NO			YES
		Fan speed
		LOW
			YES
NO	Downward discharge
		1 hour
			YES
Vane setting notch	Vane horizontal
		airflow
	w9	Compressor	NO	YES
		thermostat
		ON	NO
	Allowance
		cancel

NO YES	3-minute
	time delay
	NO
YES	6-minute	Allowance	YES
	time delay	period

	NO			NO
				6 minute
NO	3-minute			time delay
	compressor operation
	YES			Allowance set		Coil frost protection
	w10	YES
	Coil frost
	prevention
	NO
w11		NO
	Cooling area
	YES
NO	10-minute			NO
	compressor operation				1 min continue
	YES				YES
	Allowance cancel
					FAN speed
					LOW
	Coil frost	YES
	protection					YES
	NO				FAN speed
					LOW 5 min
NO	16-minute		Indoor coil	NO	elapse
			tempreature is		NO
	compressor operation
			10 C or higher			Outdoor unit
	YES		YES			trouble
	Indoor pipe	YES	3-minute
	temperature is		time delay
	1 C or lower

NO	Coil frost			Coil frost
	prevention			prevention release

Compressor ON Compressor OFF

1

w8 When operation stops or changes to cooling or dry mode, the auto vane tums to a horizontal angle. If operation changes during auto vane SWING, the auto vane will continue to swing.

w9 When operating TEST RUN, the thermostat will be continuously ON.

w10 After 3 minute compressor operation, if the indoor coil thermistor reads -15°C or below for 3 minutes, the compressor will stop for 6 minutes.

w11 Cooling area : Indoor coil temperature is more than 5 degrees above the room temperature. Heating area : Indoor coil temperature is more than 5 degrees below the room temperature. FAN area : Indoor coil temperature is within 5 degrees either way of the room temperature.

18

HEATING OPERATION

Heat operation

A

w15

w11

YES

PLH-KKHB

NO

NO

Initial

Heating area

Type

HEATING

YES

NO

NO

Defrost release

3-minute

NO

Vane setting notch

Vane initial setting

Defrost

NO

Auxiliary heater

30 min. elapse

OFF

YES

YES

2

NO

Defrosting

Indoor coil

NO

Outdoor unit trouble

thermstor is 60 C

NO

or higher

Four-way valve ON

1

NO

FAN speed

YES

Low notti

Hor adjust

YES

in process

NO

Airflow 10% up

FAN setting notch

Compressor ON

YES

YES

Indoor piping

B

NO

35 C or higher

NO

10-minute

Compressor

YES

compressor

NO

w9

operation

thermostat ON

NO

YES

HOT adjust

B

3 min.restart

6 min. elapse

prevention

Allowance cancel

YES

Allowance cancel

YES

NO

Indoor piping

FAN SPEED

YES

6 min. restart

55 C or lower

Low

prevention

Heating

YES

NO

NO

NO

A

FAN SPEED

2

NO

area

Auxiliary heater

NO

Auxiliary heater

Low 2 min.

NO

Indoor piping

ON

elapse

NO

thermostat ON

-15 C or lower

Hot adjust start

YES

YES

YES

YES

FAN STOP

FAN SPEED

NO

Indoor piping

Auxiliary heater ON

setting nitch

Outdoor unit

FAN SPEED very low

w11

60 C or higher

trouble

YES

Airflow area

YES

Hot adjust

20 min.elaspe

release

Compressor ON

Auxiliary heater OFF

FAN SPEED

YES

w10

Airflow area

Outdoor unit

Very low airflow

Heating area

trouble

Overheat remote

START

Compressor OFF

w11

NO

Airflow area

NO

NO

Indoor unit

Cooling area

70 C or higher

YES

YES

Defrost operation

START

Allowance

NO

period

Four-way valve

YES

6-minute restart

OFF

Overload protect

prevention

Allowance set

1

Compressor OFF

AUTOMATIC COOLING/HEATING OPERATION

Auto COOL/HEAT

operation

w16

1

NO

Initial mode

YES

w17

NO

>

T1 =T0

YES

COOL mode

HEAT mode

COOL mode

NO

YES

NO

T1 < (T0 - 2)

NO

T1>(T0 + 2)

YES

YES

After 15min.

YES

After 15min.

YES

T1>(T0 + 2)

T1<(T0-2)

NO

NO

COOL operation

HEAT operation

HEAT operation

Cool mode

set

1

1

w15 ( i ) Until Low airflow is set while hot adjustment (ii)While defrosting (FAN STOP)

(iii)When thermostat is OFF

In the case of( i ), (ii) and (iii) above, airflow is horizontal regardless the VANE setting. w16 When AUTO operation is started, COOL or HEAT mode is selected automatically.

w17 T1 : Room temperature. To : Set temperature

19

DRY OPERATION

DRY operation

Four-way valve / OFF

NO	Initial dry
	operation
	YES	w8

	Vane	Vane initial setting
	setting notch

YES	w12
	Room tempereature is
	18°C or lower
	NO
	During	NO
	compressor ON
	YES
	3-minute	NO			YES
	compressor			delay
	operation
	YES			NO
NO	w9		YES	Compressor &	w9
				thermostat
				ON
	YES			NO
	Compressor ON	NO			NO
	time completes
	YES			YES	w13
	10-minute compressor
	OFF timer start
	Compressor OFF
	w14				w14
	Fan STOP
	1

w8—9 Refer to page 26~27.

w12 When room temperature is 18°C or below, the compressor cannot operate.

When room temperature rises over 18°C, the compressor starts after a 3-minute time delay. w13 Compressor ON time is decided by room temperature. Refer to page 26~27 .

w14 In dry operation, compressor ON makes the fan speed LOW and compressor OFF stops the fan. It is not possible to set the fan speed with the remote controller

20

9 MICROPROCESSOR CONTROL

1.OUTLINE OF MICROPROCESSOR CONTROL

INPUT to remote controller

●OFF-ON switching.

●COOL/DRY-AUTO-HEAT selector switching.

●Thermostat setting.

●TIMER mode selector-switching and Timer setting.

●HIGH-LOW fan speed switching.

●AUTO Vane selector (AIR DISCHARGE) switching.

●TEST RUN switching.

●CHECK mode switching.

(Self diagnostic trouble shooting)

Indoor unit

Remote controller board	OUTPUT to remote controller
● Processes and transmits	Remote controller
orders.
	● LCD indicator
	FILTER
	CHECK MODE
	TEST RUN

240KA

		Non-polar, two-wire cable
	12VDC	maxinmum length 500 meters
		Signal

INPUT from indoor unit

●Room temperature thermistor (RT1)

●Indoor coil thermistor (RT2)

●Drain sensor

OUTPUT to indoor unit

Indoor controller board

●Receives orders from remote controller and temperature data from indoor unit.

●Processes orders and data.

●Controls indoor and outdoor operation.

●Self diagnostic function.

wSystem control operation.

wEmergency operation.

wSet by dipswitch on indoor controller board.

● Transmits the power to remote controller.

1 2 3

	● Autovane’s angle setting.
	● Booster heater ON-OFF Control.		unit
	● Drain pump : ON-OFF.
	● Emergency stop.	Polar three-wire cable	outdoor
	Independent Control of	Outdoor unit	to
	Outdoor Unit
		12VDC	OUTPUT
	● Compressor
	protectiondevice working
	● Defrosting
	START-STOP
	● Fan speed control.	1
	● Crankcase heater control	2
	ON-OFF.	3
	● Self diagnostic function

●Compressor and outdoor fan : ONOFF

●Operation mode change :COOLHEAT.

21

2. INDOOR UNIT CONTROL

2-1COOL operation

FILTER

CHECK MODE

TEST RUN

240KA

<How to operate>

1 Press POWER ON/OFF button.

2 Press the button to display “ ”

3 Press the TEMP button to set the desired temperature.

NOTE: Set temperature changes 1°C when the or button is pressed one time.

Cooling 19 to 30°C

<COOL operation time chart>

Operation starts by

Room temperature

Room temperature

Operation stops by

P O W E R b u t t o n

becomes equal to

rises above set

P O W E R b u t t o n

ON.

set temperature.

temperature.

OFF.

Thermostat

ON

OFF

LOW or HIGH

LOW or HIGH

ON

Indoor fan

OFF

Initally 30

degrees

30

30

(Changeable by remote controller setting)

discharge

Auto vane

air flow

position

position

3 minutes

Drain pump

ON

OFF

ON

Booster heater

OFF

OFF

Compressor

ON

OFF

Minimum 3 minutes w1

w1 Even if the room temperature rise above the set temperature during this period, the compressor will not start until this period has ended.

(1) Compressor control

1 3-minute time delay

To prevent overload, the compressor will not start within 3 minutes after stop. 2 The compressor runs when room temperature is higher than set temperature.

The compressor stops when room temperature is equal to or lower than the set temperature. 3 The compressor stops in check mode or during protective functions.

4 Coil frost prevention

To prevent indoor coil frost, the compressor will stop when the indoor coil thermistor (RT2) reads 1: or below after the compressor has been continuously operated for at least 16 minutes or more. When the indoor coil temperature rises to 10: or above, the compressor will start after a 3-minute time delay.

NOTE : By turning OFF the dipswitch SW1-5 on indoor controller board, the start temperature of coil frost prevention changes from 1: to -3:.

22