Mitsubishi Electric PLH Series Technical & Service Manual
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Mitsubishi Electric PLH Series Technical & Service Manual

Mitsubishi Electric PLH Series Technical & Service Manual

Ceiling cassettes split-type,heat pump air conditioners
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SPLIT-TYPE,HEAT PUMP AIR CONDITIONERS
TECHNICAL & SERVICE MANUAL
Series PLH
[Model names]
PLH-3GK(H)B
PLH-4GK(H)SB
PLH-5GK(H)SB
PLH-6GK(H)SB
[Service Ref.]
PLH-3GK(H)B
PLH-4GK(H)SB
PLH-5GK(H)SB
PLH-6GK(H)SB
Ceiling Cassettes
1
This manual does not cover the following
outdoor units.
please refer to the service manual
No.OC150 and this manual in a set.
[Service Ref.]
PUH-3YKA
PUH-3VKA
PUH-4YKSA
PUH-5YKSA
PUH-6YKSA
.UK
.UK
1
.UK
1
.UK
1
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
8. OPERATION FLOW-CHART ··············20
10. TROUBLESHOOTING ························47
11. 4-WAY AIR FLOW SYSTEM ···············55
12. SYSTEM CONTROL ···························60
CHECK MODE
TEST RUN
13. DISASSEMBLY PROCEDURE ···········65
14. PARTS LIST········································68
15. OPTIONAL PARTS ·····························78
The Slim Line.
From Mitsubishi Electric.
1997
No. OC148
When servicing them,
.UK
2
.UK
2
.UK
2
.UK
2
.UK
2

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Summary of Contents for Mitsubishi Electric PLH Series

  • Page 1: Table Of Contents

    9. MICROPROCESSOR CONTROL·······24 INDOOR UNIT 10. TROUBLESHOOTING ························47 11. 4-WAY AIR FLOW SYSTEM ···············55 12. SYSTEM CONTROL ···························60 FILTER CHECK MODE TEST RUN 13. DISASSEMBLY PROCEDURE ···········65 14. PARTS LIST········································68 15. OPTIONAL PARTS ·····························78 The Slim Line. From Mitsubishi Electric. REMOTE CONTROLLER...

  • Page 3: Indoor Unit

    FEATURES Ceiling Cassettes Series PLH FILTER CHECK MODE TEST RUN Remote controller Indoor unit Cooling capacity/Heating capacity Service Ref. Btu/h PLH-3GK(H)B 26,300/28,700[35,800] 7,700/ 8,400[10,500] PLH-4GK(H)SB 33,100/35,500[44,400] 9,700/10,400[13,000] PLH-5GK(H)SB 42,300/45,700[56,000] 12,400/13,400[16,400] PLH-6GK(H)SB 46,100/54,300[64,500] 13,500/15,900[18,900] 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.
  • Page 4 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-...

  • Page 5: Part Names And Functions

    PART NAMES AND FUNCTIONS Indoor (Main) Unit Filters Remove dust and pollutants from inihaled air Horizontal Air Outlet Sets airflow horizontal automatically during cooling or dehumidifying. Downward Air Outlet Grill Sets airflow downward automatically during heating. Auto Air Swing Vane Disperses airflow up and down and adjusts the angle of airflow direction.
  • Page 6 Display In this display example on the bot- CENTRALLY display tom left, a condition where all dis- CONTROLLED display play lamps light is shown for expla- The current time , start time and stop time can be displayed in tensecond nation purposes although this differs This indicates when the unit is con- intervals by pressing the time switch...

  • Page 7: Specifications

    SPECIFICATIONS Service Ref. PLH-3GK(H)B.UK Item Function Cooling Heating Btu/h 26,300 28,700[35,800] Capacity 7,700 8,400[10,500] Total input 3.31 3.10[5.20] Service Ref. PLH-3GK(H)B Power supply(phase, cycle,voltage) Single, 50Hz, 220-240V Input 0.16 0.16[2.26] Running current 0.72 0.72[9.5] Starting current 1.00 1.00[9.8] External finish Galvanized sheets with gray heat insulation Heat exchanger Plate fin coil...
  • Page 8 Service Ref. PLH-4GK(H)SB Item Function Cooling Heating Btu/h 33,100 35,500[44,400] Capacity 9,700 10,400[13,000] Total input 3.46 3.45[6.05] Service Ref. PLH-4GK(H)SB Power supply(phase, cycle,voltage) Single, 50Hz, 220-240V Input 0.26 0.26[2.86] Running current 1.18 1.18[12.0] Starting current 1.50 1.50[12.3] External finish Galvanized sheets with gray heat insulation Heat exchanger Plate fin coil Fan(drive) x No.
  • Page 9 Service Ref. PLH-5GK(H)SB Item Function Cooling Heating Btu/h 42,300 45,700[56,000] Capacity 12,400 13,400[16,400] Total input 4.49 4.44[7.44] Service Ref. PLH-5GK(H)SB Power supply(phase, cycle,voltage) Single, 50Hz, 220-240V Input 0.28 0.28[3.28] Running current 1.27 1.27[13.8] Starting current 1.50 1.50[14.0] External finish Galvanized sheets with gray heat insulation Heat exchanger Plate fin coil Fan(drive) x No.
  • Page 10 Service Ref. PLH-6GK(H)SB Item Function Cooling Heating Btu/h 46,100 54,300[64,500] Capacity 13,500 15,900[18,900] Total input 5.03 4.88[7.88] Service Ref. PLH-6GK(H)SB Power supply(phase, cycle,voltage) Single, 50Hz, 220-240V Input 0.30 0.30[3.30] Running current 1.36 1.36[13.9] Starting current 1.50 1.50[14.0] External finish Galvanized sheets with gray heat insulation Heat exchanger Plate fin coil Fan(drive) x No.

  • Page 11: Data

    DATA 1. PERFORMANCE DATA 1) COOLING CAPACITY Indoor Outdoor intake air DB°C Service Ref. intake air WB°C P.C. P.C. P.C. P.C. P.C. P.C. P.C. P.C. 7,768 2.65 7,555 2.77 7,278 2.98 6,983 3.19 6,671 3.41 6,342 3.62 5,995 3.84 5,852 3.93 8,271 2.71...
  • Page 12 2) HEATING CAPACITY Indoor Outdoor intake air DB°C Service Ref. intake air WB°C P.C. P.C. P.C. P.C. P.C. P.C. 5,752 2.11 6,593 2.34 7,514 2.57 8,516 2.83 9,595 3.09 10,752 3.37 PLH-3GK(H)B 5,508 2.28 6,334 2.52 7,231 2.77 8,198 3.04 9,235 3.33 10,340...
  • Page 13 3. ELECTRICAL DATA Indoor unit … 220V 50Hz 1phase Outdoor unit … 220V 50Hz 1phase / 380V 50Hz 3phase Service Ref. PLH-3GK(H)B PLH-4GK(H)SB PLH-5GK(H)SB PLH-6GK(H)SB Mode Cool Heat Cool Heat Cool Heat Cool Heat 8,200 10,200 13,100 15,500 Capacity (W) 7,500 9,500 12,200...
  • Page 14 4. STANDARD OPERATION DATA Service Ref. PLH-3GK(H)B PLH-4GK(H)SB PLH-5GK(H)SB PLH-6GK(H)SB Mode Cooling Heating Cooling Heating Cooling Heating Cooling Heating Capacity 7,700 8,400 9,700 10,400 12,400 13,400 13,500 15,900 Input 3.31 3.10 3.46 3.45 4.49 4.44 5.03 4.48 Indoor unit Service Ref. PLH-3GK(H)B PLH-4GK(H)SB PLH-5GK(H)SB...

  • Page 15: Outlines And Dimensions

    OUTLINES AND DIMENSIONS 1. INDOOR UNIT PLH-3GK(H)B Unit : mm (inch)
  • Page 16 PLH-4GK(H)SB Unit : mm (inch) PLH-5GK(H)SB PLH-6GK(H)SB...
  • Page 17 2. REMOTE CONTROLLER Unit : mm FILTER FILTER CHECK MODE CHECK MODE TEST RUN TEST RUN Rear side wiring arrangement opening. CAUTION SW18 SW17...

  • Page 18: Wiring Diagram

    WIRING DIAGRAM PLH-3GK(H)B .UK/PLH-5GK(H)SB PLH-4GK(H)SB .UK/PLH-6GK(H)SB fig: Remote Controller Indoor unit FAN2 MODELS DOOR REMOCON REMOCON (WHT) CN30 3GK(H)B TRANSMISSION WIRES DC12V POWER CN22 4GK(H)SB 1 2 3 CN40 (WHT) (WHT) 5GK(H)SB (WHT) 1 2 3 SW18 CENTRALLY 6GK(H)SB 1 2 3 CONTROLL 4 3 2 1 CN51...

  • Page 19: Refrigerant System Diagram

    REFRIGERANT SYSTEM DIAGRAM Unit : mm PLH-3GK(H)B .UK/PUH-3VKA Refrigerant flow in cooling Control Refrigerant flow in heating PUH-3YKA high pressure <R.V.coil> switch Heating ON Protect high Pr.SW Oil separator Cooling OFF Refrigerant pipe Outdoor unit Service (option) 4-way valve port Outdoor heat exchanger Indoor unit 15.88...

  • Page 20: Operation Flow-Chart

    OPERATION FLOW-CHART MAIN OPERATION START Power circuit breaker Check SW ON twice Operation SW “OFF” timer Set time “ON” timer complete Set time complete Trouble Remote controller operation display STOP Trouble STOP Operating mode (COOL) COOL operation PROTECTION DEVICE PROTECTION DEVICE SELF HOLD RELEASE SELF HOLD Operating mode...
  • Page 21 COOLING OPERATION COOL operation Four-way valve/OFF Initial COOLING Vane initial setting Vane 45 deg downward angle 60 deg downward angle Fan speed Downward discharge 1 hour Vane horizontal Vane setting notch airflow Compressor thermostat Allowance cancel 3-minute time delay 6-minute Allowance time delay period...
  • Page 22 DRY OPERATION operation Four-way valve / OFF Initial dry operation Vane Vane initial setting setting notch Room tempereature is 18°C or lower During compressor ON 3-minute 3-minute compressor time delay operation Compressor & Compressor & thermostat ON thermostat 10-minute Compressor ON compressor time completes Compressor ON...
  • Page 23 HEATING OPERATION Heat operation w 11 w 15 PLH-GKV initial Type Heating area HEATING Defrost release 3-minute Vane intial setting Vane setting notch Auxiliary heater Defrost 30 min. elapse Indoor coil defrosting Outdoor unit trouble thermistor is 60°C or higher Four-way valve ON FAN speed Low notti...

  • Page 24: Microprocessor Control

    MICROPROCESSOR CONTROL 1. OUTLINE OF MICROPROCESSOR CONTROL Remote controller board INPUT to remote controller OUTPUT to remote controller Processes and transmits OFF-ON switching. Remote controller orders. COOL/DRY-AUTO-HEAT selector switching. LCD indicator Thermostat setting. TIMER mode selector-switching and Timer setting. HIGH-LOW fan speed switching. FILTER CHECK MODE AUTO Vane selector (AIR DISCHARGE)
  • Page 25 2. INDOOR UNIT CONTROL 2-1 COOL operation <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. FILTER CHECK MODE NOTE: Set temperature changes 1°C when the TEST RUN button is pressed one time.
  • Page 26 5 Coil frost protection When indoor coil temperatuer becomes -15°C or below,coil frost protection will proceed as follows. <Start condition> After the compressor has been continuously operated for 3 minutes or more,and the indoor coil temperature has been - 15° or below for 3 minutes,the coil frost protection will start. <Coil frost protection>...
  • Page 27 (3) Auto vane control Auto vane position is set to 35degrees(SW5-3:OFF) or 20 degrees(SW5-3:ON) airflow at the start-up of COOL operation. It can then be changed by the remote controller. Auto vane operation can be changed between STOP mode (fixed operation) and SWINGmode by AIR DISCHARGE SWING/STOP button on the remote controller.
  • Page 28 <Auto vane drive> (a) The auto vane is driven by a 2.5 rpm motor. (b) Discharge direction can be selected between the No.1 and No.2 setting. (Initial setting is No.1) Discharge direction No.1 SW5-3 : OFF 35° 45° 55° 65° No.2 SW5-3 : ON 20°...
  • Page 29 2-2 DRY operation <How to operate> 1 Press POWER ON/OFF button. 2 Press the button to display “ ” FILTER CHECK MODE TEST RUN 3 Press the TEMP button to set the desired temperature. NOTE: The set temperature changes 1°C when the button is pressed one time.
  • Page 30 4The compressor will not start when the room temperature is below 18°C. The compressor starts intermittent operation when the power is turned ON with room temperature above 18°C. The com- pressor ON/OFF time depends on the thermostat ON/OFF and the following room temperatures.After 3-minute compres- sor operation, If the room temperature thermistor reads above 28°C with thermostat ON, the compressor will operate for 6 more min- utes and then stop for 3 minutes.
  • Page 31 2-3 HEAT operation <How to operate> 1 Press POWER ON/OFF button. 2 Press the button to display “ ” FILTER CHECK MODE 3 Press the TEMP button to set the desired temperature. TEST RUN NOTE: The set temperature changes 1°C when the button is pressed one time.
  • Page 32 (1) Compressor control 13-minute time delay To prevent overload, the compressor will not start within 3, minutes after stop. 2The compressor runs when the room temperature is lower than the set temperature. The compressor stops when the room temperature is equal to or higher than the set temperature. 3The compressor stops in check mode or during protective functions.
  • Page 33 NOTE1:The quiet cycle control does not work when the fan speed is lowered. The indoor fan stops immediately when the operation stops,except to eleminate the remaining heat. NOTE2:When the fan speed is changed with the remote controller during the set speed operation,the fan speed will change immediately.
  • Page 34 (6) Indoor coil thermistor abnormality detection An abnormality can be detected during compressor ON, except for the following. For the first 20 minutes after the temperature difference between the indoor coil temperature and room temperature enters the RANGE C. When the temperature difference enters the RANGE C until it moves to the RANGE B. (7) Defrosting operation After the outdoor unit starts the defrosting operation, when the temperature difference beetween the indoor coil tempera- ture and room temperature gets out of RANGE A and into RANGE B, the indoor unit starts the defrosting mode.
  • Page 35 2-4 AUTO operation (Automatic COOL/HEAT change over operation) <How to operate> 1 Press POWER ON/OFF button. 2 Press the button to display “ ” FILTER CHECK MODE 3 Press the TEST RUN TEMP button to set the desired temperature. NOTE: The set temperature changes 1°C when the button is pressed one time.
  • Page 36 2-5 Auto vane control <How to operate> To change the air flow direction, press button. FILTER CHECK MODE NOTE: Discharge direction can be set by the indoor dipswitch SW5-3. TEST RUN Dipswitch SW5-3:OFF 35° 45° 55° 65° SW5-3:ON 20° 35° 45°...
  • Page 37 2-6 TIMER operation <Timer function> AUTO STOP ·········The air conditioner stops after the set time lapses. AUTO START ········The air conditioner starts after the set time lapses. AUTO OFF ············Timer is not active. <How to operate> FILTER CHECK MODE 1. Press POWER ON/OFF button. TEST RUN 2.
  • Page 38 (1) Indoor coil temperature code During the test run, the indoor coil temperature code from 1 to 15 is displayed on the remote controller instead of room temperature. The code should fall with the lapse of time in normal COOL operation, and should rise in normal HEAT operation.
  • Page 39 2-9 Interlock with ventilation system (LOSSNAY) Mr. SLIM/LOSSNAY interlock operation is available by using the optional parts listed below. (1) System organization Relay box (PZ-12RB-E) Relay box Mr. SLIM LOSSNAY Power supply LOSSNAY Mr. SLIM Power supply Remote display Remote adapter controller Remote...
  • Page 40 2-10 Dip switch functions Each figure shows the initial factory setting. 1. On remote controller board (1) SW17(Address selector) 1 2 3 4 5 6 7 8 SW17-1~6) For address setting SW17-7) When two remote controllers are used,this switch sets the controller function. OFF:The remote controller is set as a main controller.
  • Page 41 (2) SW2 (Address selector) 1 2 3 4 5 6 Used in setting the unit-address for group control. For further information,refer to page 61. (3) SW3 (Emergency operation switch) Normal operation For emergency cooling For emergency heating (4) SW5 (Model selector) 1 2 3 4 SW5-1) OFF:For 220V power supply ON: For 240,230V power supply...
  • Page 42 2-11. INDOOR FAN CONTROL (1) Fan motor max. rotational frequency for PLH-GKHV 100% rotational frequency(rpm) Voltage Service Ref. 50Hz PLH-3GK(H)B PLH-4GK(H)SB PLH-5GK(H)SB PLH-6GK(H)SB (2) Quiet cycle control To prevent noise due to the sudden rise in fan output, output is controlled to rise by 1 step per 1 second. Quiet cycle con- trol works in the following modes.
  • Page 43 3. OUTDOOR UNIT CONTROL 3-1 Outdoor fan control The rotational frequency of outdoor fan is phase-controlled according to the outdoor coil temperature. This control allows the cooling operation even with the low outside-air temperature and the heating operation even with the high outside-air tempera- ture.
  • Page 44 3-5 Defrosting in HEAT mode <Defrosting time chart> Defrosting Defrosting starts. stops. Indoor unit Indoor fan 35degrees(SW5-3 OFF)or 20degrees(SW5-3:ON)discharge direction (Remote controller still displays set direction.) Auto vane Set direction Set direction Outdoor unit 4-way valve Bypass valve Outdoor fan Compressor (1) Start conditions A.
  • Page 45 (3) Defrost interval The defrost interval time is determined as follows. Initial defrost interval is 50 minutes. The defrost interval after defrosting depends on the preceding defrosting time as shown below. Defrosting operation time Next defrost interval 3 minutes or below 120 minutes 3 to 7 minutes 80 minutes...
  • Page 46 3-7 Service functions (1) Compulsory defrositng 1When all of the following conditions are satisfied, pressing SW2 starts the compulsory defrosting. During HEAT mode The compressor is ON. The outdoor coil temperature is being displayed by LED. (Outdoor controller board dip switch SW3-1 : OFF, SW3-2 : The outdoor coil thermistor reads 8°C or below.

  • Page 47: Troubleshooting

    TROUBLESHOOTING 1.TROUBLES IN TEST RUN Symptom Cause Check points The display “CENTRALLY 1) Wrong address setting of remote con- 1) Check the address setting of remote controller CONTROLLED” on remote troller/indoor controller board. and indoor controller. controller dose not disap- 2) Timer adapter is connected to the 2) Make sure the timer adapter is used correctly.
  • Page 48 2. SELF DIAGNOSTIC FUNCTION WITH REMOTE CONTROLLER 2-1 When malfunction occurs during operation When a malfunction occurs, the indoor and outdoor units stop and the malfunction is displayed on the LCD of the remote con- troller. (1) ON the set temperature display part, “CHECK” appears, and the unit address and the check code are diplayed alternately at one-second intervals.
  • Page 49 Check Diagnosis of malfunction Cause Check points code Signal transmitting/receiving During individual unit control 1) Check the transmission wire. error 1) Bad contact of transmission 2) Check with another remote controller. If “EO” is (Indoor controller does not wire still indicated, replace the indoor controller respond to remote controller 2) Signal transmitting/receiving cir- board.
  • Page 50 3.SERVICE DATA INDICATION BY SWITCHES ON OUTDOOR CONTROLLER BOARD Setting dip switchs SW2 and SW3 on the outdoor controller board enables LED to show the output state and check code. Output state is shown by LED lighting, and check code by blinking. SW1 : Turning SW1 ON clears the check code.
  • Page 51 3-1 Outdoor coil temperature To obtain data on the outdoor coil temperature, add the number of bits of lighting LEDs, and see the graph below to find the temperature. (Short 238 bits) (Short 238 bits) (Open 8 bits) (Open 8 bits) Number of bits 3-2 Fan output step To obtain data on the fan output step, add the number of bits of lighting LEDs, and see the graph below to find the fan...
  • Page 52 4. TROUBLESHOOTING ACCORDING TO CHECK CODE Blinking Cause Check point Reversed phase Phases L , and L are con- Check the power supply connection. nected improperly. Open phase Phase L is open. Check the power supply. Contact of protector, such as Check each protector.
  • Page 53 6. WRONG WIRING ON SITE 6-1 Between remote controller and indoor unit If the wire is disconnected between the remote controller and the indoor unit, nothing is displayed on the remote controller when the POWER button is pressed. The beep sound will also not be heard. 6-2 Phenomenon due to wrong wiring between indoor and outdoor units Wrong Wiring Mode...
  • Page 54 7. OTHER TROUBLES AND CAUSES Vanes do not work. Vane motor is damaged. Vane motor does not work. Vane motor relay is damaged. Limit swtich does not work. Connector is poorly connected. Limit switch is damaged. Vane motor is poorly assembled. The size of the cam is wrong.

  • Page 55: Way Air Flow System

    4-WAY AIR FLOW SYSTEM 1. Placement of the air outlets For this grill, the airflow direction comes in 11 patterns for PLH-3GK(H)B .UK and in 6 patterns for PLH-4~6GK(H)SB .UK. Also, by setting the dip switches (SWA and SWB)on the indoor board to the appropriate settings, you can adjust the air flow and speed.
  • Page 56 2.Adjusting the width of the air outlets (opening or closing fully) For full closing … Install the insulation 4 or 5 furnished in For full opening…With a cutter knife or equivalent, cut off the Styrofoam. this kit, from the rear of the panel. With a cutter knife, cut off the Surrounding insulating material Insulation 4 or 5...
  • Page 57 3-2 Fresh air intake amount & static pressure characteristics 1 1 PLH-3GK(H)B .UK (Standard / with the high efficiency filter) How to read curves P(Pa) Q … Planned amount of fresh air intake Duct characteristics Curve in the at site <Pa>...
  • Page 58 4.BRANCH DUCT(Installation at site) Discharge by branch duct becomes possible by installing a branch duce at site. Knockout holes on the wall panel of the indoor unit must be removed. Fig 2. Branch duct connection details 4-1 Branch Duct Installation Procedure Knock out hole for duct connection Install the branch duct at site by the following pro-...
  • Page 59 4-3 Air flow & Static pressure characteristics of Branch Duct (with SWA at “Standard”) 4 direction airflow Static Static PLH-3GK(H)B PLH-4GK(H)SB pressure pressure (Pa) (Pa) 750mmo2 directions 340mmo4 directions 340mmo2 directions Air flow (m /min) Air flow (m /min) Static Static PLH-5GK(H)SB PLH-6GK(H)SB...

  • Page 60: System Control

    SYSTEM CONTROL 1. VARIETY OF SYSTEM CONTROL FUNCTIONS Many units, installed at different locations, can be started 1 Group control with and controlled with a aingle remote controller. The remote a single remote controller can be mounted in a different location using a controller non-polar two-wire cable, which can be extended up to (See page 61.)
  • Page 61 2. GROUP CONTROL WITH A SINGLE REMOTE CONTROLLER A maximum of 50 units can be started in order according to the dip switch settings 2-1 How to wire Figure 1 (1) Connect the remote controller to the double terminal block on the indoor controller board of the master unit (No.0 unit).
  • Page 62 3. CONTROL USING TWO REMOTE CONTROLLERS : OPTIONAL REMOTE CNTROLLER (PAC-SK47RC) Two remote controllers can be used to control either one unit or a group of units. Units operate according to the latest com- mand from either of the two remote controllers. Before operation, be sure to set one remote controller as the “main controller”...
  • Page 63 NOTE1 : Install the relay box where you can be serviced it easily. NOTE2 : For control circuit wiring, use a wire of No. 14 AWG or a control cable according to the power supply of control circuit. NOTE3 : When the power supply of the control circuit is 220/240V AC, Do not connect the control circuit wire to the remote controller cable directly.
  • Page 64 Indoor controller board 6. MULTIPLE REMOTE CONTROL DISPLAY You can control serveral units with a multiple remote control display, by wiring an optional multiple display adapter (PAC-SA88HA-E) with relays and lamps on the market. 6-1 How to wire (1) Connect the multipe display adapter to the connector CN51 on the indoor controller board.

  • Page 65: Disassembly Procedure

    DISASSEMBLY PROCEDURE PLH-3GK(H)B Be careful on removing heavy parts. OPERATING PROCEDURE PHOTOS&ILLUSTRATIONS 1. Removing the intake grill Filter knob Photo 1 (1) Slide the lever in the direction of the arrow 1. (2) Open it 90 deg. (3) Slide the intake grill in the direction of the arrow 2 and remove it.
  • Page 66 OPERATING PROCEDURE PHOTOS&ILLUSTRATIONS 4. Remove the fan motor Photo 5 Fan nut (1) Remove the fan guard. (2) Remove the turbo fan nut. (3) Pull out the turbo fan. (4) Disconnect the connector of the fan motor lead wire. (5) Remove the 3 nuts of the fan motor. Connector 5.
  • Page 67 OPERATING PROCEDURE PHOTOS&ILLUSTRATIONS 7. Removing the panel Connector Photo 9 (1) Disconnect the connector. (2) Remove 2 of 4 screws of the panel, and loosen the other 2 screws. (3) Slide the panel slightly to remove it. Panel set screws 8.

  • Page 68: Parts List

    PARTS LIST PANEL PARTS PLH-3GKHB.UK PLH-3GK(H)B Part numbers that are circled are not shown in the figure. Q'ty / set Price PLH-3 Wiring Recom- Remarks Parts No. Parts Name Specification Diagram mended (Drawing No.) GKHB.UK Symbol Q'ty Unit Amount GK(H)B T7W 700 003 AIR OUTLET GRILLE PANEL...
  • Page 69 PANEL PARTS PLH-3GKHB.UK PLH-3GK(H)B Q'ty / set Price PLH-3 Wiring Recom- Remarks Parts No. Parts Name Specification Diagram mended (Drawing No.) GKHB.UK Symbol Q'ty Unit Amount GK(H)B R01 W29 002 AUTO VANE(2) R01 W30 002 AUTO VANE(3) R01 W28 085 AIR GUIDE(1) R01 W28 086 AIR GUIDE(2)
  • Page 70 PANEL PARTS PLH-4GKHSB.UK PLH-5GKHSB.UK PLH-6GKHSB.UK PLH-4GK(H)SB PLH-5GK(H)SB PLH-6GK(H)SB Part numbers that are circled are not shown in the figure. Q'ty / set Price PLH-4 PLH-5 PLH-6 Wiring Recom- Remarks Parts No. Parts Name Specification Diagram mended (Drawing No.) GKHSB.UK Symbol Q'ty Unit Amount...
  • Page 71 PANEL PARTS PLH-4GKHSB.UK PLH-5GKHSB.UK PLH-6GKHSB.UK PLH-4GK(H)SB PLH-5GK(H)SB PLH-6GK(H)SB Q'ty / set Price PLH-4 PLH-5 PLH-6 Wiring Recom- Remarks Parts No. Parts Name Specification Diagram mended (Drawing No.) GKHSB.UK Symbol Q'ty Unit Amount GK(H)SB R01 W50 002 AUTO VANE (L1) R01 W51 002 AUTO VANE (L2) R01 W29 002 AUTO VANE (2)
  • Page 72 FUNCTIONAL PARTS PLH-3GKHB.UK PLH-3GK(H)B...
  • Page 73 Part numbers that are circled are not shown in the figure. Q'ty/set Price Wiring Recom- Remarks PLH-3 Parts No. Parts Name Specifications Diagram mended (Drawing No.) Symbol Q'ty GKHB. GKHB Unit Amount — BASE (BG00C305G21) DRAM (1) (BG00A102G09) — DRAM (2) (BG00A101G08) —...
  • Page 74 FUNCTIONAL PARTS PLH-4GKHSB.UK PLH-5GKHSB.UK PLH-6GKHSB.UK PLH-4GKHSB PLH-5GKHSB PLH-6GKHSB...
  • Page 75 Part numbers that are circled are not shown in the figure. Price PUH-6.UK Remarks Wiring Recom- PUH-5.UK PUH-4.UK Parts No. Parts Name Specifications Diagram mended (Drawing No.) Amount GKHSB GKHSB GKHSB GKHSB GKHSB GKHSB Unit Symbol Q'ty — (BG00C305G22) BASE —...
  • Page 76 FUNCTIONAL PARTS PLH-4GKSB PLH-5GKSB PLH-6GKSB...
  • Page 77 Part numbers that are circled are not shown in the figure. Price Q'ty/set Wiring Recom- Remarks Parts No. Parts Name Specifications Diagram PLH-4 PLH-5 PLH-6 mended (Drawing No.) Unit Amount Symbol Q'ty GKSB — BASE (BG00C305G22) — DRAM (1) (BG00A102G09) —...

  • Page 78: Optional Parts

    OPTIONAL PARTS 1. REFRIGERANT PIPES Service Ref. : PLH-3GK(H)B Part No. PAC-05FFS-E PAC-07FFS-E PAC-10FFS-E PAC-15FFS-E Pipe length Pipe size O.D . Liquid:[9.52 Gas:[15.88 Connection method Indoor unit: Flared Outdoor unit: Flared Service Ref. : PLH-4GK(H)SB .UK,PLH-5GK(H)SB .UK,PLH-6GK(H)SB Part No. PAC-PC51PI-E PAC-SC52PI-E PAC-SC53PI-E PAC-SC54PI-E...
  • Page 79 2-3. How to connect program timer (1) Install the program timer next to the remote controller the same way as the remote controller is installed. (2) Connect the program timer and the remote controller with a 6-wire cable as shown in the figure below Connect to indoor unit NOTE:While the program timer is connected to the remote controller, the 2-wire cable...
  • Page 80 DUAL D U A L C E N T R A L O P E R A T I O N CENTRAL MITSUBISHI ELECTRIC 10 9 8 7 6 5 4 3 2 1 1 1 7 5-2. Functions POWER ON/OFF switch Operation ON/OFF switch.
  • Page 81 5-3 Connection method (1) Connections in the power supply cord. 1. Connect the power supply cord to the power supply terminal-block and fix it in-place with a tie-wrap. Connect a single phase 200V AV (220, 230, 240V) to is the GND terminal, be sure to ground the earth wire. 2.
  • Page 82 6. PROGRAM TIMER ADAPTER This adapter is needed when a program timer(PAC-SK65PT)or a centralized remote controller(PAC-805RC)is used. Part No. PAC-825AD 6-1 Parts included 1 ADAPTER ·························1P 2 3-core cable···························1P 3 3-core cable···························1P Length : 2m (6' 7") Length : 2m (6' 7") 4 4-core cable···························1P 5 5-core cable···························1P Length : 2m (6' 7")
  • Page 83 (3) Connections from adaptor Fig.3 To program timer or Adaptor 200~240V AC centralized remote controller CN30 CN50 3-core cable 5-core cable 5 CN51 Remote controller Indoor unit Max. length of each calbe is 10m. 6-3 Dimecsions (Unit : mm) Fig. 4 40 27 3holes 4Fixing screw holes...
  • Page 84 HEAD OFFICE MITSUBISHI DENKI BLDG.MARUNOUCHI TOKYO100 TELEX J24532 CABLE MELCO TOKYO © Copyright 1997 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD. New publication, effective Jun. 1997 Issued in Jun 1997. No.OC148 560 Specifications subject to change without notice Printed in Japan...

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