Mitsubishi Electric PL12AK User Manual
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Mitsubishi Electric PL12AK User Manual

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PL12AK
PL18AK
PL24AK
PL30AK
PL36AK
PL42AK
CONTENTS
1. FEATURES ····································································································OC246- 2
2. PART NAME AND FUNCTIONS ····································································OC246- 4
3. SPECIFICATIONS ··························································································OC246- 6
4. DATA ··············································································································OC246- 7
5. OUTLINES AND DIMENSIONS ····································································OC246-16
6. REFRIGERANT SYSTEM DIAGRAM ····························································OC246-17
7. WIRING DIAGRAM ························································································OC246-18
8. OPERATION LOW-CHART ············································································OC246-19
9. MICROPROCESSOR CONTROL ··································································OC246-22
10. TROUBLESHOOTING ····················································································OC246-33
11. 4-WAY AIR FLOW SYSTEM ········································································OC246-39
12. SYSTEM CONTROL ······················································································OC246-45
13. DISASSEMBLY PROCEDURE ······································································OC246-50
14. PARTS LIST ··································································································OC246-53
15. OPTIONAL PARTS ························································································OC246-56

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  • Page 1: Table Of Contents

    PL12AK PL18AK PL24AK PL30AK PL36AK PL42AK CONTENTS 1. FEATURES ····································································································OC246- 2 2. PART NAME AND FUNCTIONS ····································································OC246- 4 3. SPECIFICATIONS ··························································································OC246- 6 4. DATA ··············································································································OC246- 7 5. OUTLINES AND DIMENSIONS ····································································OC246-16 6. REFRIGERANT SYSTEM DIAGRAM ····························································OC246-17 7. WIRING DIAGRAM ························································································OC246-18 8.

  • Page 2: Features

    CHECK SET TEMP. START STOP SPEED FILTER AUTO CHECK MODE RETURN TEST RUN Remote controller Indoor Unit Models Cooling capacity SEER PL12AK 12,500 Btu/h 10.1 PL18AK 18,400 Btu/h 10.2 PL24AK 24,000 Btu/h 10.0 PL30AK 31,000 Btu/h 10.6 PL36AK 36,500 Btu/h 10.5...
  • Page 3 5. DRAIN PUMP FOR EASY PIPE CONNECTION (DRAIN LIFT-UP MECHANISM) This mechanism, with its capacity to raise drain water 33-7/16 inch above the ceiling line, is convenient for removing water and avoiding piping contact with beams, etc. 6. FRESH AIR INTAKE AND BRANCH DUCTING ARE AVAILABLE (on-site work) 7.

  • Page 4: Part Names And Functions

    PART NAMES AND FUNCTIONS Indoor (Main) Unit Filter Remove dust and pollutants from return air Horizontal Air Outlet Sets airflow horizontal automatically during cooling or dehumidifying. Grille Auto Air Swing Vane Disperses airflow up and down and adjusts the angle of airflow direction.
  • Page 5 Display In this display example on the bottom left, a condi- CENTRALLY CLOCK display tion where all display lamps light is shown for CONTROLLED display explanation purposes although this differs from The current time , start time and stop time can be displayed in ten second actual operation.

  • Page 6: Specifications

    SPECIFICATIONS MODELS : PL12/18/24/30/36/42AK Model PL18AK PL24AK PL30AK PL36AK PL42AK PL12AK Item Btu/h Capacity 18,400 24,000 36,500 42,500 12,500 31,00 Pints/h Moisture removal 11.1 12.6 Power Consumption 1.85 2.65 3.64 4.08 1.26 3.17 10.0 10.4 SEER 10.2 10.0 10.5 10.8 10.1...

  • Page 7: Data

    0.23 13.0 12.4 1.00 12.1 1.05 12.2 11.6 1.13 11.6 11.1 1.23 11.0 10.5 10.5 10.0 1.41 12.7 1.33 PL12AK 12.9 DB 75-F (50%RH) 62.5 11.1 1.00 10.8 1.05 12.1 10.4 1.12 11.5 1.22 10.9 1.32 10.4 1.41 12.5 12.4 DB 72-F (50%RH) 10.7...

  • Page 8: Performance Curve

    2. PERFORMANCE CURVE NOTES : A point on the curve shows the reference point. PL12AK COOLING CAPACITY PL18AK COOLING CAPACITY SHF=0.81 SHF=0.82 Indoor intake air WB temperature ( F) Indoor intake air WB temperature ( F) Indoor intake air WB temperature ( F)
  • Page 9 NOTES : A point on the curve shows the reference point. PL42AK COOLING CAPACITY PL36AK COOLING CAPACITY SHF=0.72 SHF=0.69 Indoor intake air WB temperature ( F) Indoor intake air WB temperature (-F) Indoor intake air WB temperature ( F) Indoor intake air WB temperature ( F) 65 (67) 75 32 35 65 (67) 75...
  • Page 10 3. CONDENSING PRESSURE AND SUCTION PRESSURE Data is based on the condition of indoor humidity 50%. Air flow should be set at HI. A point on the curve shows the reference point. <PL12AK> COOLING MODE (psi.G) (psi.G) Indoor DB temperature( F)

  • Page 11: Oc246

    Data is based on the condition of indoor humidity 50%. Air flow should be set at HI. A point on the curve shows the reference point. <PL24AK> COOLING MODE (psi.G) (psi.G) Indoor DB temperature( F) Indoor DB temperature( F) DB( F) DB( F) Outdoor ambient temperature Outdoor ambient temperature...

  • Page 12: Oc246

    Data is based on the condition of indoor humidity 50%. Air flow should be set at HI. A point on the curve shows the reference point. <PL36AK > COOLING MODE (psi.G) (psi.G) Indoor DB temperature( F) Indoor DB temperature( F) DB( F) DB( F) Outdoor ambient temperature...

  • Page 13: Standard Operation Data

    4. STANDARD OPERATION DATA Model PL12AK PL18AK PL24AK PL30AK PL36AK PL42AK Item Unit Cooling Cooling Cooling Cooling Cooling Cooling Capacity Btu / t 12,500 18,500 24,000 31,000 36,500 42,500 0.69 0.82 0.81 0.81 0.78 0.72 4.08 Input 1.26 1.85 2.65 3.17...
  • Page 14 6.OUTLET AIR SPEED AND COVERAGE RANGE PL12AK PL18AK PL24AK PL30AK PL36AK PL42AK Airflow (CFM) 1,060 1,060 1,060 Standard Air speed (ft / sec.) 12.5 13.1 16.1 17.1 21.7 21.7 height Coverage range (ft) •The air coverage range is the value up to the position where the air speed is 0.8ft/sec. when air is blown out horizontally from the unit at the High fan setting.
  • Page 15 PL30AK PL24AK NOTCH SPL(dB) LINE NOTCH SPL(dB) LINE NC-70 NC-70 NC-60 NC-60 NC-50 NC-50 NC-40 NC-40 NC-30 NC-30 APPROXIMATE APPROXIMATE THRESHOLD OF THRESHOLD OF HEARING FOR HEARING FOR NC-20 NC-20 CONTINUOUS CONTINUOUS NOISE NOISE 1000 2000 4000 8000 1000 2000 4000 8000 BAND CENTER FREQUENCIES, Hz...

  • Page 16: Outlines And Dimensions

    OUTLINES AND DIMENSIONS 1. INDOOR UNIT Unit : inch PL12AK , PL18AK , PL24AK , PL30AK , PL36AK , PL42AK Ceiling hole 13/16~1-3/4 33-7/8~35-13/16 13/16~1-3/4 Branch duct hole 31-7/8 Fresh air intake (Cut out hole) Suspension bolt pitch 3-9/16 3-15/16 3-15/16...

  • Page 17: Refrigerant System Diagram

    Unit : inch 2.Remote controller 5-1/8 3/32 23/32 SWING TIMER OFF TIMER CLOCK AUTO AUTO CHECK SET TEMP. START STOP FILTER SPEED AUTO CHECK MODE RETURN TEST RUN REFRIGERANT SYSTEM DIAGRAM Unit : inch PL12/18/24AK Refrigerant pipe (option) {5/8" (with heat insulator) Flared connection Strainer Indoor coil...

  • Page 18: Wiring Diagram

    WIRING DIAGRAM MODELS: PL12/18/24/30/36/42AK WIRING DIAGRAM GRILLE POWER SUPPLY MV MV MV ~(1PHASE) AC115V 60Hz GRN/YLW (AC115V) (DC13.1V) CN2S (WHT) CNSK(RED) GROUND TRANS LED2 LED1 SW1 SW2 MODELS MODELS D.U.M POWER D.HEATER VANE SW18 (RED) (BLU) (WHT) CNC (ORN) POWER CN2D CN6V 12AK...

  • Page 19: Operation Low-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 20 COOLING OPERATION COOL operation Initial COOLING Vane initial setting Vane 55 deg downward angle 70 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 6 minute 3-minute...

  • Page 21: Dry Operation

    DRY OPERATION operation Initial dry operation Vane Vane initial setting setting notch Room temperature is 64-F or lower During compressor ON 3-minute 3-minute compressor time delay operation Compressor & Compressor & thermostat thermostat ON 10-minute Compressor ON compressor time completes Compressor ON 10-minute compressor OFF timer start...

  • Page 22: Microprocessor Control

    MICROPROCESSOR CONTROL 1. OUTLINE OF MICROPROCESSOR CONTROL Remote controller board OUTPUT to remote controller INPUT to remote controller OFF-ON switching. Processes and transmits Remote controller COOL/DRY-FAN selector switching. orders. LCD indicator Thermostat setting. TIMER mode selector-switching and Timer setting. HIGH-LOW fan speed switching. AUTO Vane selector (AIR DISCHARGE) SWING TIMER OFF TIMER...

  • Page 23: Indoor Unit Control

    2. INDOOR UNIT CONTROL 2-1 COOL operation <How to operate> 1 Press POWER ON/OFF button. 2 Press the MODE button to display COOL. 3 Press the SET TEMP. button to set the desired temperature. SWING TIMER OFF TIMER CLOCK AUTO AUTO NOTE: Set temperature changes 2°F when the SET TEMP.
  • Page 24 5 Coil frost protection When indoor coil temperature becomes 5°F 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 5°F or below for 3 minutes,the coil frost protection will start. <Coil frost protection>...
  • Page 25 (4) Detecting abnormalities in the outdoor unit After the compressor has been continuously operated for 3 minutes, if the difference between the indoor coil temperature and room temperature is out of RANGE C for 1 minute, the indoor fan speed will turn to LOW. Five minutes later, if the dif- ference is still out of RANGE C,the outdoor unit is functioning abnormally.
  • Page 26 2-2 DRY operation <How to operate> SWING TIMER OFF TIMER CLOCK AUTO AUTO 1 Press POWER ON/OFF button. CHECK SET TEMP. START STOP FILTER SPEED AUTO CHECK MODE RETURN TEST RUN 2 Press the MODE button to display “DRY” 3 Press the SET TEMP. button to set the desired temperature. NOTE: The set temperature changes 2°F when the SET TEMP.
  • Page 27 4The compressor will not start when the room temperature is 64°F or below. The compressor starts intermittent operation when the power is turned ON with room temperature above 64°F. 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 82°F with thermostat ON, the compressor will operate for 6 more min- utes and then stop for 3 minutes.
  • Page 28 2-3 Auto vane control <How to operate> To change the air flow direction, press AIR DISCHARGE button. SWING TIMER OFF TIMER CLOCK AUTO AUTO CHECK SET TEMP. START STOP FILTER SPEED AUTO CHECK MODE RETURN TEST RUN 30° 45° 55° 70°...
  • Page 29 2-4 TIMER operation WIRED REMOTE CONTROLLER <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> SWING 1.
  • Page 30 (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. Code ~34(36)°F 36(37)°F~50°F...
  • Page 31 2-7 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 32 Address setting is available at any time. The initial factory setting by is based on each capacity. Model PL18AK PL24AK PL30AK PL42AK PL36AK PL12AK 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 (7) SW8...

  • Page 33: 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 does not disap- 2) Timer adapter is connected to the 2) Make sure the timer adapter is used correctly.

  • Page 34: Wired Remote Controller

    2. SELF DIAGNOSTIC FUNCTION WITH REMOTE CONTROLLER (WIRED 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 controller. (1) ON the set temperature display part, “CHECK” appears, and the unit CHECK mode address and the check code are displayed alternately at one-second intervals.

  • Page 35: Noise

    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 “E0” is (Indoor controller does not wire still indicated, replace the indoor controller respond to remote controller 2) Signal transmitting/receiving cir- board.
  • Page 36 3. OTHER TROUBLES AND CAUSES Vanes do not work. Vane motor is damaged. Vane motor does not work. Vane motor relay is damaged. Connector is poorly connected. Vane motor is poorly assembled. Indoor controller board is damaged. Unit stops after 5 to Refer to check code on remote controller display.
  • Page 37 4. How to check the parts PL12AK/PL18AK/PL24AK/PL30AK/PL36AK/PL42AK Parts name Check points Room temperature Disconnect the connector then measure the resistance using a tester. thermistor (RT1) (Surrounding temperature 50-F~86-F) Liquid pipe Normal Abnormal (Refer to the thermistor) thermistor (RT2) 4.3k"~9.6k" Open or short Vane motor Measure the resistance between the terminals using a tester.
  • Page 38 <Thermistor Characteristic graph> < Thermistor for lower temperature > Room temperature thermistor(RT1) Thermistor for Liquid pipe thermistor(RT2) lower temperature Thermistor R =15k' ± 3% Fixed number of B=3480k' ± 2% Rt=15exp { 3480( 273+{(t-32)/1.8} 32°F 15k' 50°F 9.6k' 68°F 6.3k' 104 122 77°F 5.2k'...

  • Page 39: Way Air Flow System

    4-WAY AIR FLOW SYSTEM 1. Placement of the air outlets • For this grille, the blowout direction comes in 11 patterns. Also, by setting the dip switches (SW8-3, SW8-4) on the indoor board to the appropriate settings, you can adjust the air flow and speed.
  • Page 40 3. Fresh air intake amount & static pressure characteristics l l PL12 / 18AK Multifunction casement + Standard filter Multifunction casement + High efficiency filter Static pressure [in. W.G. O10 Static pressure [in. W.G. O10 Air flow [CFM] Air flow [CFM] 2 intakes 2 intakes 1 intake...
  • Page 41 4. Interlocking operation method with duct fan (Booster fan) Whenever the indoor unit is operating the duct fan also Be sure to secure insulation operates. material by tape and such Green CN51 (1)Connect the optional multiple remote controller adapter(PAC-SA88HA-E)to the connector CN51 on the Yellow indoor unit indoor controller board.
  • Page 42 6. Air flow & Static pressure characteristics of Branch Duct (with SWA at “Standard”) (1) 4 direction airflow (Horizontal vane) Angled duct Rounded duct PL12AK PL12AK Static Static pressure pressure [in. W.G. O10 [in. W.G. O10 Air flow [CFM] Air flow [CFM]...
  • Page 43 (2) 3 direction airflow (Horizontal vane) Angle duct Rounded duct PL12AK PL12AK Static Static pressure pressure [in. W.G. O10 [in. W.G. O10 Air flow [CFM] Air flow [CFM] PL18AK PL18AK Static pressure [in. W.G. O10 Static pressure [in. W.G. O10...
  • Page 44 (3) 2 direction airflow (Horizontal vane) Angle duct Rounded duct PL12AK PL12AK Static Static pressure pressure [in. W.G. O10 [in. W.G. O10 Air flow [CFM] Air flow [CFM] PL18AK PL18AK Static Static pressure pressure [in. W.G. O10 [in. W.G. O10...

  • Page 45: System Control

    SYSTEM CONTROL 1. VARIETY OF SYSTEM CONTROL FUNCTIONS Many units, installed at different locations, can be started Group control and controlled with a single remote controller. The remote with a single controller can be mounted in a different location using a remote controller non-polar two-wire cable, which can be extended up to (See page OC246-...
  • Page 46 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 47 3. CONTROL USING TWO REMOTE CONTROLLERS 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” and the other as the “sub controller”, using dip switch SW17-7 of the remote controller.
  • Page 48 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 115V AC, Do not connect the control circuit wire to the remote controller cable directly.

  • Page 49: Auto Restart Function

    6. MULTIPLE REMOTE CONTROL DISPLAY You can control several units with a multiple remote control display, by Indoor controller board wiring an optional multiple display adapter (PAC-SA88HA-E) with relays and lamps on the market. How to wire (1) Connect the multiple display adapter to the connector CN51 on the indoor controller board.

  • Page 50: Disassembly Procedure

    DISASSEMBLY PROCEDURE PL18AK Be careful on removing heavy parts. OPERATING PROCEDURE PHOTOS&ILLUSTRATIONS 1. Removing the air intake grille Figure 1 (1) Slide the knob of air intake grille to the direction of the arrow 1 to open the air intake grille. Air intake grille (2) Remove the string hook from the panel to pretend the grille from dropping.
  • Page 51 OPERATING PROCEDURE PHOTOS&ILLUSTRATIONS 4. Remove the fan motor Photo 3 (1) Remove the bell mouth.(See photo 1) Fan motor (2) Remove the electrical box.(See photo 2) (3) Remove the turbo fan nut. (4) Pull out the turbo fan. (5) Disconnect the connector of the fan motor lead wire. (6) Remove the 4 nuts of the fan motor.
  • Page 52 OPERATING PROCEDURE PHOTOS&ILLUSTRATIONS 8. Removing the drain pump and drain sensor Photo 7 (1) Remove the panel. (See photo 5) (2) Remove the bell mouth. (See photo 1) (3) Remove the electrical box. (See photo 2) (4) Remove the drain pan. (See photo 6) (5) Remove the 3 screws of the drain pump.

  • Page 53: Parts List

    PARTS LIST PANEL PARTS PL12AK PL18AK PL24AK PL30AK PL36AK PL42AK Q'ty / set Price Wiring Recom- Remarks Parts No. Parts Name Specification Diagram mended (Drawing No.) 12 , 18 , 24 , 30 , 36 , 42 Unit Amount Symbol...
  • Page 54 FUNCTIONAL PARTS PL12AK PL18AK PL24AK PL30AK PL36AK PL42AK Q'ty / set Price Wiring Recom- Remarks Specification Parts No. Parts Name Diagram mended (Drawing No.) Symbol Q'ty Unit Amount R01 E00 114 TURBO FAN R01 E01 114 TURBO FAN R01 08K 097...
  • Page 55 FUNCTIONAL PARTS PL12AK PL18AK PL24AK PL30AK PL36AK PL42AK Q'ty / set Price Wiring Recom- Remarks Parts No. Parts Name Specification Diagram mended (Drawing No.) Unit Amount Symbol Q'ty T7W E00 527 DRAIN HOSE T7W E04 355 DRAIN PUMP R01 E00 266...

  • Page 56: Optional Parts

    OPTIONAL PARTS 1. REFRIGERANT PIPES Service Ref. : PL12/18/24AK Part No. PACSK03FS PACSK05FS PACSK07FS PACSK10FS PACSK15FS Pipe length (ft.) Pipe size O.D.(in.) (in.) Liquid:[3/8 Gas:[5/8 Connection method Indoor unit: Flared Outdoor unit: Flared Service Ref. : PL30/36/42AK Part No. PACSK03FF PACSK05FF PACSK07FF PACSK10FF...

  • Page 57: Continuous

    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 5-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 58 3. TIMER ADAPTER This adapter is needed for system control and for operation via external contacts. Adapter connection is described on page 49. Part No. PAC-SA89TA-E 4. MULTIPLE REMOTE CONTROLLER ADAPTER This adapter is needed for remote indication (operation/check). Adapter connection is described on page 49. Part No.
  • Page 59 © Copyright 2000 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD. Distributed in Jun. 2001. No.OC256 REVISED EDITION-B New publication, effective Jun. 2001 Distributed in Mar. 2001. No.OC256 REVISED EDITION-A Specifications subject to change without notice Distributed in Dec. 2000. No.OC256 Printed in Atlanta 07/2001...
  • Page 60 3400 Lawrenceville Suwanee Road Suwanee, Georgia 30024 ● Toll Free: 800-433-4822 Toll Free Fax: 800-889-9904 ● www.mrslim.com Specifications are subject to change without notice.

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