Mitsubishi Electric PLH Series Operating manual

TECHNICAL & SERVICE MANUAL

SPLIT-TYPE,HEAT PUMP AIR CONDITIONERS

CONTENTS

1. FEATURES ···········································3

2. PART NAMES AND FUNCTIONS········5

3. SPECIFICATIONS·································7

4. DATA ···················································11

5. OUTLINES AND DIMENSIONS··········15

6. WIRING DIAGRAM·····························18

REFRIGERANT SYSTEM DIAGRAM

······19

8. OPERATION FLOW-CHART··············20

9. MICROPROCESSOR CONTROL·······24

10. TROUBLESHOOTING························47

11. 4-WAY AIR FLOW SYSTEM···············55

12. SYSTEM CONTROL···························60

13. DISASSEMBLY PROCEDURE···········65

14. PARTS LIST········································68

15. OPTIONAL PARTS·····························78

[Model names]

PLH-3GK(H)B

PLH-4GK(H)SB

PLH-5GK(H)SB

PLH-6GK(H)SB

No. OC148

1997

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-3YKA2.UK

PUH-3VKA2.UK

PUH-4YKSA2.UK

PUH-5YKSA2.UK

PUH-6YKSA2.UK

INDOOR UNIT

Ceiling Cassettes

Series PLH

FILTER

CHECK MODE

TEST RUN

REMOTE CONTROLLER The Slim Line.

From Mitsubishi Electric.

[Service Ref.]

PLH-3GK(H)B

.UK

PLH-4GK(H)SB

.UK

PLH-5GK(H)SB

.UK

PLH-6GK(H)SB

.UK

FEATURES

1.THE QUIETEST PERFORMANCE IN THE FIELD-39 PHONS(PLH-3GK(H)B.UK)

Excellent noise suppression is achieved because of the turbofan’s large diameter. Also wing-shaped vanes and a low-resis-

tance air flow desigh help to suppress noise.

2.FAN CONTROL ELIMINATES SUDDEN,SHARP NOISES

Sudden,sharp noises are eliminated by a fan control mechanism that smoothly and gradually increases rpms when the ther-

mostat switches the heater on or when the air conditioners in the dehumidifying“dry”mode.

3.VERSATILE AIR FLOW

Fan phase control and computer control allow a wide variety of air flow configurations. The optimal blown-air volume can be

chosen in accordance with the ceilling height and number of air vents at specific settings.

4.AUTOMATIC SETTING OF THE OPTIMAL AIR OUTLET ANGLE

The air outlet angle is altered automatically,to an almost horizontal angle of 20˚during cooling and an almost perpendicular

angle of 65˚during heating,to deliver the most comfort possible.This mechanism gives an even greater control over air flow.

5.NEXT-GENERATION AIR -CONDITIONING VENTILATION INTERLOCK SYSTEM

“Mr.SLIM” + “LOSSNAY”

Proper ventilation is important to improve the quality of indoor environments. lt eliminates unclean air,which is not only

unpleasant,but also unhealthy.

The“Mr.SLM”+“LOSSNAY”ventilation interlocking system achieves high air quality with minimum energy consumption.

LOSSNAY´s unique total heat exchanger reduces heating and cooling expenses by about 25 percent annually(in compari-

son with our exisiting models). ln addition,its mechanism of simultaneous forced air supply and exhaust enables it to deliver

high quality air.

Together the“Mr.SLIM”+“LOSSNAY”system makes next-generation air conditioning possible. This system is both people-and

environmental-friendly.

6.FLUCTUATING AIR CONTROL THAT ELIMINATES DRAFTS

A computerized fluctuating air control mechanism automatically controls the flow of air so that it feels natural and free of

drafts. Linkage with a swing mechanism sends a refreshing and natural breeze throughout the room. <Cooling><Air flow>

Indoor unit

Ceiling Cassettes

Series PLH

Remote controller

FILTER

CHECK MODE

TEST RUN

Service Ref.

PLH-3GK(H)B1.UK

PLH-4GK(H)SB1.UK

PLH-5GK(H)SB1.UK

PLH-6GK(H)SB1.UK

Cooling capacity/Heating capacity

Btu/h

26,300/28,700[35,800]

33,100/35,500[44,400]

42,300/45,700[56,000]

46,100/54,300[64,500]

7,700/ 8,400[10,500]

9,700/10,400[13,000]

12,400/13,400[16,400]

13,500/15,900[18,900]

7.INCREASED DEHUMIDIFICATION WITH FAN PHASE CONTROL NEW ELECTRONIC

DEHUMIDI-FIER OPERATION

A new electronic dehumidifier mode,where fan speed is controlled precisely by fan phase control,increases dehumidification

volume and raises dehumidifying effectiveness.This results in a pleasant environment all-year around,even during extended

rainy seasons.

8. A90˚GRILL SWITCHING MECHANISM MAKES INSTALLATION CONSIDERABLY EASIER (3HP)

The direction of the panel designs can be adjusted to match the interior desigh of the space in which tyey are being used.

This allows for greater flexibillty in air conditioning space and plumbing work.

9.HIGH-PERFORMANCE FILTER(colorimetric method:65%)OPTION

A high-performance filter can be installed(colorimetric method:65%)by setting the blown-air volume switch SWC.

.OUTSIDE AIR INCORPORATION

lnstallation of an outside air intake casement(option)allows fresh air

from outside to be incorporated with limited pressure loss.

.ADVANCED MICROPROCESSOR

(1)Easy to use microprocessor

1)Ultra-thin remote controller

The streamlinde,square controller is designed to blend well with

any interior.Also,the sophisticated microproceeor allows you to

easily carry out a wide range of operations.

2)Attractive liquid crystal display(LCD)

The unit´s operation mode,set temperature,room

temperature,timer setting,fan speed,louver oper-ation,and air flow

direction are displayed on the remote controller´s easy-to-read

Liquid Crystal Dis-play(LCD).

3)Convenient 24-hour ON-OFF timer

The timer switches Mr.SLIM on and off automati-cally at the time

you set. Once the timer is set,the remaining time is shown on the

LCD.

.INNOVATIVE SYSTEM CONTROL BY MICROPROCESSORS

The most significant feature of the series PLH-GK(H)(S)B is the advanced microprocessor control. The development of this

system is due to the recent world-wide trend in the air conditioning of larger buildings. They are moving away from central-

ized duct systems and using individual split type units instead. There are a number of reasons for this change. First of

all,the duct´s costly,and troublesome installation is eliminated. Second,the overall air conditioning balance is excellent in

split type units. Lastly,the operation costs are low due to the flexible control of each unit. This system was developed exclu-

sively by Mitsubishi Electric because of high demand. The microprocessor control makes individual control,group

control,control using two remote controllers,and remote on/off and individual control possible without trouble-some equip-

ment modifications.

FILTER

CHECK MODE

TEST RUN

PART NAMES AND FUNCTIONS

● Indoor (Main) Unit

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

Auto Air Swing Vane

Disperses airflow up and

down and adjusts the angle

of airflow direction.

Grill

Filters

Remove dust and pollutants

from inihaled air

Horizontal Air Outlet

Sets airflow horizontal automatically

during cooling or dehumidifying.

Downward Air Outlet

Sets airflow downward

automatically during

heating.

Air Intake

Inhales air from room.

FILTER

CHECK MODE

TEST RUN

● Operation buttons

● Remote controller

CHECK-TEST RUN button

Only press this button to per-

form an inspection check or test

operation Do not use it for

nomal operation.

(This button does not operate in this

model)

button

This switches the horizontal fan

motion ON and OFF.

FILTER button

This resets the filter service indica-

tion display.

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.

button

This sets the ventilation fan

speed.

button

This sets of switches the current

time. start time and stop time.

button

This switches between continuous

operation and the timer operation.

TEMP button

This sets the room temparature The

temparature setting can be per-

formed in 1°C units

Setting range

Cooler 19°C to 30°C

Heater 17°C to 28°C

button

Press this button to switch the cooler

electronic dry (dehumidify) automatic

and heater modes.

This model name of the remote con-

troller is indicated.

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 button are pressed.This indicates that this room unit is not equipped with

the fan direction adjustment function and the louver function.

FILTER

CHECK MODE

TEST RUN

Operation lamp

This lamp lights during operation,

goes off when the unit stops and

flashes when amalfunction occurs.

CENTRALLY

CONTROLLED display

This indicates when the unit is con-

trolled by optional features such as

central control type remote controller.

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

is discharged.

DEFROST display

This indicates when the defrost oper-

ation is performed.

CHECK display

This indicates when a malfunction

has occurred in the unit which should

be checked.

display

This lamp lights when electricity is

supplied to the unit.

display

This displays the selected setting

temperature.

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.

display

The selected fan speed is displayed.

●Display

display

The temperature of the suction air is

displayed during operation. The dis-

play range is 8° to 39°C. The display

flashes 8°C when the actual temper-

ature is less than 8° and flashes

39°C when the actual temperature is

greater than 39°C.

In this display example on the bot-

tom left, a condition where all dis-

play lamps light is shown for expla-

nation purposes although this differs

from actual operation.

display

This display lights in the check mode

or when a test operation is per-

formed.

CHECK MODE

TEST RUN

display

This lamp lights when the filter need

to be cleaned.

FILTER

display

This displays the air

direction.

SPECIFICATIONS

Service Ref.

Power supply(phase, cycle,voltage)

External finish

Heat exchanger

Booster heater

Operation control & Thermostat

Noise level(Low-High)

Cond. drain conn. O.D.

Dimensions

Weight

Service Ref.

Power supply (phase, cycle, voltage)

External finish

Refrigerant control

Compressor

Heat exchanger

Defrost method

Noise level

Dimensions

Weight

Refrigerant

Pipe size O.D.

Connection method

Between the indoor & outdoor units

Input

Running current

Starting current

Fan(drive) x No.

Fan motor output

Airflow(Low-High)

External static pressure

Input

Running current

Starting current

Model

Motor output

Starter type

Protection devices

Fan(drive) x No.

Fan motor output

Airflow

Charge

Liquid

Gas

Indoor side

Outdoor side

Height difference

Piping length

Function

Capacity

Total input

INDOOR UNITOUTDOOR UNIT

REFRIGERANT

PIPING

Item Service Ref.

Btu/h

K/ min (CFM)

Pa(mmAq)

dB(A)

mm,(in)

kg,(lbs)

K/ min (CFM)

dB(A)

mm,(in)

kg,(lbs)

mm,(in)

PLH-3GK(H)B.UK

Cooling

26,300

7,700

3.31

Heating

28,700[35,800]

8,400[10,500]

3.10[5.20]

0.16

0.72

1.00

0.16[2.26]

0.72[9.5]

1.00[9.8]

UNIT : 820(32-1/4)

UNIT : 258(10-1/8)

UNIT : 29(64)

PANEL : 950(37-3/8)

PANEL : 65(2-9/16)

PANEL : 7(16)

3.15

13.82/5.16

58/37

2.94

12.89/4.81

58/37

PLH-3GK(H)B1.UK

Single, 50Hz, 220-240V

Galvanized sheets with gray heat insulation

Plate fin coil

Turbo fan (direct) x 1

0.050

14-18(495-640)

0(direct blow)

[2.1]

Remote controller & built-in

32-39

30(1-1/4)

PUH-3VKA2.UK/PUH-3YKA2.UK

Single, 50Hz, 220-240V/3, 50Hz, 380-415V(4wires)

Munsell 5Y 7/1

Capillary tube

Hermetic

NH52VND/NH52YDA

2.2/2.4

Line start

Plate fin coil

Propeller (direct) x1

0.085

50(1764)

Reverse cycle

870(34-1/4)

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

850(33-1/4)

75(165)

R-22

3.2(7.1)

9.52 (3/8)

15.88(5/8)

Flared

Max. 50m

wV …Internal Thermostat, HP switch

Y…Anti-phase protector, thermal relay, thermal switch, HP switch

Service Ref.

Power supply(phase, cycle,voltage)

External finish

Heat exchanger

Booster heater

Operation control & Thermostat

Noise level(Low-High)

Cond. drain conn. O.D.

Dimensions

Weight

Service Ref.

Power supply (phase, cycle, voltage)

External finish

Refrigerant control

Compressor

Heat exchanger

Defrost method

Noise level

Dimensions

Weight

Refrigerant

Pipe size O.D.

Connection method

Between the indoor & outdoor units

Input

Running current

Starting current

Fan(drive) x No.

Fan motor output

Airflow(Low-High)

External static pressure

Input

Running current

Starting current

Model

Motor output

Starter type

Protection devices

Fan(drive) x No.

Fan motor output

Airflow

Charge

Liquid

Gas

Indoor side

Outdoor side

Height difference

Piping length

Function

Capacity

Total input

INDOOR UNITOUTDOOR UNIT

REFRIGERANT

PIPING

Item Service Ref.

Btu/h

K/ min (CFM)

Pa(mmAq)

dB(A)

mm,(in)

kg,(lbs)

K/ min (CFM)

dB(A)

mm,(in)

kg,(lbs)

mm,(in)

PLH-4GK(H)SB1.UK

Cooling

33,100

9,700

3.46

Heating

35,500[44,400]

10,400[13,000]

3.45[6.05]

0.26

1.18

1.50

0.26[2.86]

1.18[12.0]

1.50[12.3]

UNIT : 1340(52-3/4)

UNIT : 820(32-1/4)

UNIT : 258(10-1/8)

UNIT : 45(99)

PANEL : 1470(57-7/8)

PANEL : 950(37-3/8)

PANEL : 65(2-9/16)

PANEL :10(22)

3.20

5.24

3.19

5.22

PLH-4GK(H)SB1.UK

Single, 50Hz, 220-240V

Galvanized sheets with gray heat insulation

Plate fin coil

Turbo fan (direct) x 2

0.050+0.050

23-32(810-1130)

0(direct blow)

[2.6]

Remote controller & built-in

34-42

30(1-1/4)

PUH-4YKSA2.UK

3, 50Hz, 380-415V(4wire)

Munsell 5Y 7/1

Capillary tube

Hermetic

NH56YDA

2.7

Line start

Anti-phasa protector, Thermal relay, Thermal switch, HP switch

Plate fin coil

Propeller (direct) x2

0.065+0.065

95(3550)

Reverse cycle

870(34-1/4)

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

1258(49-1/2)

94(207)

R-22

4.2(9.2)

9.52(3/8)

19.05(3/4)

Flared

Max. 50m

Service Ref.

Power supply(phase, cycle,voltage)

External finish

Heat exchanger

Booster heater

Operation control & Thermostat

Noise level(Low-High)

Cond. drain conn. O.D.

Dimensions

Weight

Service Ref.

Power supply (phase, cycle, voltage)

External finish

Refrigerant control

Compressor

Heat exchanger

Defrost method

Noise level

Dimensions

Weight

Refrigerant

Pipe size O.D.

Connection method

Between the indoor & outdoor units

Input

Running current

Starting current

Fan(drive) x No.

Fan motor output

Airflow(Low-High)

External static pressure

Input

Running current

Starting current

Model

Motor output

Starter type

Protection devices

Fan(drive) x No.

Fan motor output

Airflow

Charge

Liquid

Gas

Indoor side

Outdoor side

Height difference

Piping length

Function

Capacity

Total input

INDOOR UNITOUTDOOR UNIT

REFRIGERANT

PIPING

Item Service Ref.

Btu/h

K/ min (CFM)

Pa(mmAq)

dB(A)

mm,(in)

kg,(lbs)

K/ min (CFM)

dB(A)

mm,(in)

kg,(lbs)

mm,(in)

PLH-5GK(H)SB1.UK

Cooling

42,300

12,400

4.49

Heating

45,700[56,000]

13,400[16,400]

4.44[7.44]

0.28

1.27

1.50

0.28[3.28]

1.27[13.8]

1.50[14.0]

UNIT : 1340(52-3/4)

UNIT : 820(32-1/4)

UNIT : 258(10-1/8)

UNIT : 45(99)

PANEL : 1470(57-7/8)

PANEL : 950(37-3/8)

PANEL : 65(2-9/16)

PANEL :10(22)

4.21

6.89

4.16

6.81

PLH-5GK(H)SB1.UK

Single, 50Hz, 220-240V

Galvanized sheets with gray heat insulation

Plate fin coil

Turbo fan (direct) x 2

0.050+0.050

24-33(850-1165)

0(direct blow)

[3.0]

Remote controller & built-in

36-43

30(1-1/4)

PUH-5YKSA2.UK

3, 50Hz, 380-415V(4wire)

Munsell 5Y 7/1

Capillary tube

Hermetic

ZR61K3-TFD

3.5

Line start

Internal thermostat, Anti-phasa protector, Thermal switch, HP switch

Plate fin coil

Propeller (direct) x2

0.085+0.085

95(3550)

Reverse cycle

970(38-3/16)

345+24(13-9/16 add 1)

1258(49-1/2)

114(251)

R-22

5.4(11.9)

9.52(3/8)

19.05(3/4)

Flared

Max. 50m

Service Ref.

Power supply(phase, cycle,voltage)

External finish

Heat exchanger

Booster heater

Operation control & Thermostat

Noise level(Low-High)

Cond. drain conn. O.D.

Dimensions

Weight

Service Ref.

Power supply (phase, cycle, voltage)

External finish

Refrigerant control

Compressor

Heat exchanger

Defrost method

Noise level

Dimensions

Weight

Refrigerant

Pipe size O.D.

Connection method

Between the indoor & outdoor units

Input

Running current

Starting current

Fan(drive) x No.

Fan motor output

Airflow(Low-High)

External static pressure

Input

Running current

Starting current

Model

Motor output

Starter type

Protection devices

Fan(drive) x No.

Fan motor output

Airflow

Charge

Liquid

Gas

Indoor side

Outdoor side

Height difference

Piping length

Function

Capacity

Total input

INDOOR UNITOUTDOOR UNIT

REFRIGERANT

PIPING

Item Service Ref.

Btu/h

K/ min (CFM)

Pa(mmAq)

dB(A)

mm,(in)

kg,(lbs)

K/ min (CFM)

dB(A)

mm,(in)

kg,(lbs)

mm,(in)

PLH-6GK(H)SB1.UK

Cooling

46,100

13,500

5.03

Heating

54,300[64,500]

15,900[18,900]

4.88[7.88]

0.30

1.36

1.50

0.30[3.30]

1.36[13.9]

1.50[14.0]

UNIT : 1340(52-3/4)

UNIT : 820(32-1/4)

UNIT : 258(10-1/8)

UNIT : 45(99)

PANEL : 1470(57-7/8)

PANEL : 950(37-3/8)

PANEL : 65(2-9/16)

PANEL :10(22)

4.73

7.74

4.58

7.50

PLH-6GK(H)SB1.UK

Single, 50Hz, 220-240V

Galvanized sheets with gray heat insulation

Plate fin coil

Turbo fan (direct) x 2

0.050+0.050

25-35(880-1235)

0(direct blow)

[3.0]

Remote controller & built-in

38-45

30(1-1/4)

PUH-6YKSA2.UK

3, 50Hz, 380-415V(4wire)

Munsell 5Y 7/1

Capillary tube

Hermetic

ZR68KC-TFD

4.0

Line start

Internal thermostat, Anti-phasa protector, Thermal switch, HP switch

Plate fin coil

Propeller (direct) x2

0.10+0.10

100(3530)

Reverse cycle

970(38-3/16)

345+24(13-9/16 add 1)

1258(49-1/2)

117(258)

R-22

5.0(11.0)

9.52(3/8)

19.05(3/4)

Flared

Max. 50m

This manual suits for next models

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