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Mitsubishi Electric PK12FK3 Manual
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Mitsubishi Electric PK12FK3 Manual

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PK12FK3
PK18FK3
PK24FK3
PK30FK3
PK36FK3
CONTENTS
1. TECHNICAL CHANGE ···················································································OC274- 2
2. FEATURES ·····································································································OC274- 3
3. PART NAMES AND FUNCTIONS··································································OC274- 6
4. SPECIFICATIONS ··························································································OC274- 8
5. DATA···············································································································OC274- 9
6. OUTLINES AND DIMENSIONS ·····································································OC274-17
7. REFRIGERANT SYSTEM DIAGRAM ····························································OC274-20
8. WIRING DIAGRAM·························································································OC274-21
9. OPERATION FLOW-CHART··········································································OC274-23
10.MICROPROCESSOR CONTROL····································································OC274-26
11. TROUBLESHOOTING ····················································································OC274-38
12. SYSTEM CONTROL·······················································································OC274-44
13. DISASSEMBLY PROCEDURE·······································································OC274-49
14. PARTS LIST····································································································OC274-52
15. OPTIONAL PARTS ·························································································OC274-58
OC274-1

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  • Page 1: Table Of Contents

    PK12FK3 PK18FK3 PK24FK3 PK30FK3 PK36FK3 CONTENTS 1. TECHNICAL CHANGE ···················································································OC274- 2 2. FEATURES ·····································································································OC274- 3 3. PART NAMES AND FUNCTIONS··································································OC274- 6 4. SPECIFICATIONS ··························································································OC274- 8 5. DATA···············································································································OC274- 9 6. OUTLINES AND DIMENSIONS ·····································································OC274-17 7. REFRIGERANT SYSTEM DIAGRAM ····························································OC274-20 8. WIRING DIAGRAM·························································································OC274-21 9.

  • Page 2: Technical Change

    TECHNICAL CHANGE PK12FK PK12FK3 PK18FK PK18FK3 PK24FK PK24FK3 PK30FK PK30FK3 PK36FK PK36FK3 INDOOR CONTROLLER BOARD has changed. 1) From TRANSFORMER to POWER BOARD. 2) From JUMPER CONNECTOR(J1) to DIP SWITCH(SW1). 3) From JUMPER CONNECTOR(J5) to DIP SWITCH(SW5). 4) The number of switches of SW7 changed from 4 to 3 pieces.

  • Page 3: Features

    The PK series models have been downsized and now require such minimal wall space that they can even be installed above windows. For the PK12FK3, 11-13/16in of wall space between the ceiling and the window allows “above window” installation. (13-3/8in for the PK24/30/36FK3) 2.
  • Page 4 4. ADVANCED MICROPROCESSOR [Remote controller] (1) Easy to Use Microprocessor 1) Ultra-Thin Remote Controller The streamlined, wide controller is designed to blend with any kind of interior and the adoption of SWING a sophisticated microprocessor allows you to DRY COOL TIMER OFF TIMER CLOCK AUTO AUTO CHECK SET TEMP.
  • Page 5 6. HIGH RELIABILITY AND EASY SERVICING In addition to the self-diagnostic function, units are also equipped with a 3-minute time delay mechanism (cooling), an auto restart function, an emergency operation function, a test run switch, etc., to assure high reliability and easy servicing. 7.

  • Page 6: Part Names And Functions

    PART NAMES AND FUNCTIONS Remote controller Settings remain in effect until changed. Air conditioner can be operated by simply pushing ON/OFF button once settings have been made. Remote controller operation buttons CLOCK/TIMER button TIMER ON/OFF button This sets or switches the current time,start time and stop time.
  • Page 7 Remote controller 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 8: Specifications

    SPECIFICATIONS MODELS : PK12FK3, PK18FK3, PK24FK3, PK30FK3, PK36FK3 Model PK12FK3 PK18FK3 PK24FK3 PK30FK3 PK36FK3 Item Capacity Btu/h 12,500 18,500 24,000 30,000 34,200 Power consumption 1.21 1.75 2.34 3.06 3.47 10.3 10.6 10.3 SEER 11.5 11.3 10.6 10.7 10.2 INDOOR UNIT MODEL...

  • Page 9: Data

    10.1 1.21 11.9 1.31 11.3 1.40 12.7 12.0 1.01 12.2 11.5 1.09 11.6 10.9 1.18 11.1 10.5 1.27 10.5 1.36 PK12FK3 0.18 DB75˚F(50%RH) 62.5 12.6 10.7 1.01 12.1 10.3 1.09 11.5 1.17 11.0 1.26 10.4 1.35 DB72˚F(50%RH) 12.0 10.4 0.99 11.5...
  • Page 10 2. PERFORMANCE CURVE NOTE : A point on the curve shows the reference point. PK12FK3 COOLING CAPACITY PK18FK3 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) indoor intake air WB temperature (°F)
  • Page 11 Data is based on the condition under indoor humidity 50%. Air flow should be set at HI. A point on the curve shows the reference point. <Coling mode> [psi. G] PK12FK3 PK12FK3 [psi. G] indoor intake air WB temperature (°F) indoor intake air WB temperature (°F)
  • Page 12 Data is based on the condition under indoor humidity 50%. Air flow should be set at HI. A point on the curve shows the reference point. <Coling mode> PK18FK3 PK18FK3 [psi.G] [psi.G] Indoor DB temperature (°F) Indoor DB temperature (°F) 100 110 100 110 DB(°F)
  • Page 13 Data is based on the condition under indoor humidity 50%. Air flow should be set at HI. A point on the curve shows the reference point. <Coling mode> [psi. G] PK30FK3 PK30FK3 [psi.G] indoor intake air WB temperature (°F) indoor intake air WB temperature (°F) 100 110 100 110 DB(°F)
  • Page 14 3. STANDARD OPERATION DATA Model PK12FK3 PK18FK3 PK24FK3 PK30FK3 PK36FK3 Item Unit Cooling Cooling Cooling Cooling Cooling Capacity Btu / t 12,500 18,500 24,000 30,000 34,200 — 0.81 0.82 0.72 0.75 0.71 Input 1.21 1.75 2.34 3.06 3.47 INDOOR UNIT MODEL...
  • Page 15 DB (˚F) WB (˚F) DB (˚F) WB (˚F) Standard temperature Maximum temperature Cooling Minimum temperature — Maximum humidity 5. OUTLET AIR SPEED AND COVERAGE RANGE PK12FK3 PK18FK3 PK24FK3 PK30FK3 PK36FK3 Standard Airflow (CFM) height Air speed (ft / sec.) 14.1 16.1...
  • Page 16 6. NOISE CRITERION CURVES SPL(dB) LINE NOTCH SPL(dB) LINE NOTCH PK18FK3 PK12FK3 PK24FK3 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 125 250 500 1000 2000 4000 8000...

  • Page 17: Outlines And Dimensions

    OUTLINES AND DIMENSIONS Indoor Unit PK12FK3 OC274-17...
  • Page 18 PK18FK3 PK24FK3 OC274-18...
  • Page 19 PK30FK3 PK36FK3 OC274-19...

  • Page 20: Refrigerant System Diagram

    TIMER OFF TIMER CLOCK AUTO AUTO CHECK SET TEMP. START STOP FILTER SPEED AUTO CHECK MODE RETURN TEST RUN REFRIGERANT SYSTEM DIAGRAM PK12FK3 PK18FK3 PK24FK3 Refrigerant pipe (option) {5/8" (with heat insulator) Flared connection Refrigerant flow Strainer COOLING Pipe temperature...

  • Page 21: Wiring Diagram

    WIRING DIAGRAM MODEL PK12FK3 WIRING DIAGRAM POWER SUPPLY ~(1PHASE) AC115V 60Hz GRN/YLW (DC13.1V) (AC115V) GROUND CN2S (WHT) CNSK(RED) TRANS POWER POWER 1 3 5 CNDK VANE CN23 (WHT) SW18 (WHT) (RED) (GRN) CN2D VANE (WHT) (GRN) 5 4 3 2 1...
  • Page 22 MODELS PK18/24/30/36FK3 WIRING DIAGRAM POWER SUPPLY ~(1PHASE) AC115V 60Hz GRN/YLW (DC13.1V) (AC115V) GROUND CN2S (WHT) CNSK(RED) TRANS POWER POWER 1 3 5 CNDK (WHT) VANE SW18 (RED) (WHT) CN2D CN6V (WHT) (WHT) 5 4 3 2 1 SW17 LED1 LED2 WIRELESS CN90 (WHT)

  • Page 23: 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 24 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 25 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 ON thermostat 10-minute Compressor ON compressor time completes Compressor ON 10-minute compressor OFF timer start...

  • Page 26: Microprocessor Control

    MICROPROCESSOR CONTROL 1. OUTLINE OF MICROPROCESSOR CONTROL Remote controller board OUTPUT to remote controller INPUT to remote controller Processes and transmits OFF-ON switching. orders. Remote controller COOL/DRY-FAN selector switching. LCD indicator Thermostat setting. TIMER mode selector-switching and Timer setting. SWING TIMER OFF TIMER CLOCK AUTO AUTO CHECK SET TEMP.
  • Page 27 2. INDOOR UNIT CONTROL 2-1 COOL operation <How to operate> 1 Press the ON/OFF button. 2 Press MODE button to set operation mode to Cool. 3 To set desired temperature, press SET TEMP.button. SWING DRY COOL TIMER OFF TIMER CLOCK AUTO AUTO CHECK SET TEMP.
  • Page 28 (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. The compressor maintains the previous state when the room temperature minus the set temperature is 0 degrees or more, or lower than 2 degrees.
  • Page 29 (!) Every time AIR DISCHARGE button is pressed, setting will be change. (@) Airflow direction can be changed with AIR DISCHARGED button. 1 Fan speed : LOW 70° SWING 10° 60° PK12FK3 does not provide SWING function. 2 Fan speed : HIGH 70° SWING 10° 60°...
  • Page 30 (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 differ- ence is still out of RANGE C,the outdoor unit is functioning abnormally.
  • Page 31 2-2 DRY operation <How to operate> 1 Press POWER ON/OFF button. SWING DRY COOL TIMER OFF TIMER CLOCK AUTO AUTO 2 Press the MODE button to display “DRY” CHECK SET TEMP. START STOP SPEED AUTO RETURN 3 Press the SET TEMP. button to set the desired temperature. NOTE: The set temperature changes 2°F when the SET TEMP.
  • Page 32 (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. The compressor maintains the previous state when the room temperature minus the set temperature is 0°F or more, or lower than 2°F.
  • Page 33 30˚ 70˚ 10˚ 60˚ SWING REMOTE CONTROLLER W1. PK12FK3 does not provide SWING function <Remote controller display> 10° 30° downward Available in COOL operation with fan speed on HIGH. Unavailable in DRY operation. If fan speed changes from LOW to HIGH during 30°...
  • Page 34 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> 1. Press POWER ON/OFF button. 2.
  • Page 35 (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 36 (2) SW18(Function selector) 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 for PK12FK3 for PK18/24/30/36FK3 SW18-1) Switch for timer OFF:Single day ON:timer every day SW18-2) Switch for filter sign OFF:filter sign absent ON:filter sign present SW18-3) Switch for filter sign time setting.
  • Page 37 SW8-5) Not for use. SW8-6) Not for use. (8) SW9 (Model selector) 1 2 3 4 1 2 3 4 for PK12FK3 for PK18/24/30/36FK3 SW9-1~5) Keep this switch. 3. INDOOR FAN CONTROL Indoor fan relay output. (a) During fan ON The indoor fan relay turns ON.

  • Page 38: Troubleshooting

    TROUBLESHOOTING 1. TROUBLE IN TEST RUN Cause Check points Symptom 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 39 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 40 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 41 3. WRONG WIRING ON SITE Symptom due to wrong wiring between indoor and outdoor units Wrong wiring Thermostat Phenomena The outdoor unit stops. Indoor unit Outdoor unit Operation stops. 9 minutes later, the check code ¨P8¨ appears on the remote controller display. Disconnect between 1 and 1 or 2 and Operation stops.
  • Page 42 4. OTHER TROUBLES AND CAUSES vanes do not work. Vane motor is damaged. Vane motor does not work. Vane motor relay is damaged. Limit switch does not work. Connector is poorly connected. Limit switch is damaged. Vane motor is poorly assembled. The size of the cam is wrong.
  • Page 43 5. HOW TO CHECK THE PARTS Parts name Check points Room temperature Disconnect the connector, then measure the resistance using a tester. thermistor (RT1) (Surrounding temperature 50°F to 86°F) Pipe temperature thermistor (RT2) Normal Abnormal (Refer to the thermistor) 4.3k to 9.6k Open or short Fan motor (MF)

  • Page 44: 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 single 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 OC274-...
  • Page 45 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 46 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 47 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 48 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 49: Disassembly Procedure

    DISASSEMBLY PROCEDURE Indoor unit PK24FK3 OPERATING PROCEDURE PHOTOS&ILLUSTRATION 1. Removing the lower side of the indoor unit from the instal- Figure 1 lation plate (1) Remove the 2 screws. Hanger of indoor unit Hang the indoor unit hangers to the catches on the instal- lation plate.
  • Page 50 OPERATING PROCEDURE PHOTOS&ILLUSTRATION (9) Remove the screws of the indoor controller board case, Relay Photo 3 and pull out the indoor controller board case. Then the transformer and the capacitor and relay can be serviced. Power board Capacitor Indoor controller board case Electrical box 5.
  • Page 51 OPERATING PROCEDURE PHOTOS 8. Removing the line flow fan and the fan motor Photo 7 (1) Remove the left and right side panels. Screw Line flow fan (2) Remove the grilles. (3) Remove the electrical box. Fan motor (4) Remove the drain pan. (5) Loosen the screw that fixes the line flow fan to the fan motor.

  • Page 52: Parts List

    PARTS LIST STRUCTURAL PARTS PK12FK3 Part number that is circled is not shown in the figure. Q'ty / set Wiring Remarks Parts No. Parts Name Specifications Diagram PK12FK3 (Drawing No.) Symbol R01 47J 651 FRONT PANEL R01 KV5 096 SCREW CAP...
  • Page 53 STRUCTURAL PARTS PK18FK3 PK24FK3 PK30FK3 PK36FK3 Part numbers that are circled are not shown in the figure. Q'ty / set Wiring Remarks Parts No. Parts Name Specifications Diagram (Drawing No.) 18FK3 24FK3 30FK3 36FK3 Symbol R01 12G 662 LEFT SIDE PANEL R01 E01 812 UNDER PLATE R01 E00 812...
  • Page 54 ELECTRICAL PARTS PK12FK3 Q'ty / set Wiring Remarks Parts No. Parts Name Specifications Diagram PK12FK3 (Drawing No.) Symbol T7W B07 480 HEAT EXCHANGER R01 KV5 114 LINE FLOW FAN R01 566 103 SLEEVE BEARING R01 KV5 106 BEARING SUPPORT R01 KV5 102...
  • Page 55 Q'ty / set Wiring Remarks Parts No. Parts Name Specifications Diagram PK12FK3 (Drawing No.) Symbol R01 KV5 038 GUIDE VANE T7W A00 305 REMOTE CONTROLLER CABLE 33ft T7W E05 713 REMOTE CONTROLLER R01 KV5 130 MOTOR SUPPORT T7W B04 762...
  • Page 56 ELECTRICAL PARTS PK18FK3 PK24FK3 PK30FK3 PK36FK3 26·27 13 14 Q'ty / set Wiring Remarks Parts No. Parts Name Specifications Diagram (Drawing No.) 18FK3 24FK3 30FK3 36FK3 Symbol R01 005 103 SLEEVE BEARING R01 Z61 102 BEARING MOUNT R01 13G 114 LEFT LINE FLOW FAN R01 17G 114 LEFT LINE FLOW FAN...
  • Page 57 Q'ty / set Wiring Remarks Parts No. Parts Name Specifications Diagram (Drawing No.) 18FK3 24FK3 30FK3 36FK3 Symbol R01 12G 621 CENTER COVER R01 12G 063 JOINT SHAFT R01 12G 002 AUTO VANE R01 16G 002 AUTO VANE R01 KV5 527 DRAIN HOSE R01 12G 223 VANE MOTOR...

  • Page 58: Optional Parts

    OPTIONAL PARTS 1. TIMER When using a program timer, a program timer adapter (PAC-825AD) is also needed. (PAC-825AD is included with PAC-SC32PTA.) Part No. PAC-SC32PTA (with set back function) Model Name Program timer 1-1 Program timer specifications Parts name Program timer Parts No.
  • Page 59 1-4. Names and functions <PAC-SC32PTA> SET BACK DISPLAY DAILY TIMER SETTING DISPLAY WEEKLY TIMER SETTING DISPLAY CURRENT TIME DISPLAY During MONITOR status,current Indicates the set back range. Sets timer for a week. 24 hours is divided into 48 blocks and each time is display.
  • 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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