Mitsubishi Electric CITY MULTI PKFY-P24NKMU-E2 Technical & Service Manual
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Mitsubishi Electric CITY MULTI PKFY-P24NKMU-E2 Technical & Service Manual

Mitsubishi Electric CITY MULTI PKFY-P24NKMU-E2 Technical & Service Manual

Split-type, heat pump air conditioners
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SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
TECHNICAL & SERVICE MANUAL
Indoor unit
[Model Name]
PKFY-P24NKMU-E2
PKFY-P30NKMU-E2
INDOOR UNIT
[Service Ref.]
PKFY-P24NKMU-E2R1.TH
PKFY-P30NKMU-E2R1.TH
November 2023
R410A
CONTENTS
2. SPECIFICATION ..................................... 3
4. WIRING DIAGRAM ................................. 6
6. TROUBLESHOOTING ............................ 8
7. DISASSEMBLY PROCEDURE ............. 15
8. REMOTE CONTROLLER ...................... 19
PARTS CATALOG (OCB848)
No. OCH848
Note:
• This manual
describes only
service data of
the indoor units.

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Summary of Contents for Mitsubishi Electric CITY MULTI PKFY-P24NKMU-E2

  • Page 1: Table Of Contents

    SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS November 2023 No. OCH848 TECHNICAL & SERVICE MANUAL R410A Indoor unit [Model Name] [Service Ref.] Note: • This manual PKFY-P24NKMU-E2R1.TH PKFY-P24NKMU-E2 describes only service data of PKFY-P30NKMU-E2R1.TH the indoor units. PKFY-P30NKMU-E2 CONTENTS 1. PART NAMES AND FUNCTIONS ..2 2.

  • Page 2: Part Names And Functions

    Use the specified refrigerant only. Never use any refrigerant other than that specified. Doing so may cause a burst, an explosion, or fire when the unit is being used, serviced, or disposed of. Correct refrigerant is specified in the manuals and on the spec labels provided with our products. We will not be held responsible for mechanical failure, system malfunction, unit breakdown or accidents caused by failure to follow the instructions.

  • Page 3: Specification

    SPECIFICATION 2-1. Specifications Service Ref. PKFY-P30NKMU-E2R1.TH PKFY-P24NKMU-E2R1.TH Item Single phase 208-230 V 60 Hz Power source Cooling capacity (Nominal) Btu/h 24,000 30,000 0.07 0.07 Power input 0.50 0.50 Current input Heating capacity 10.0 (Nominal ) Btu/h 27,000 34,000 0.07 0.07 Power input 0.50 0.50...

  • Page 4: Electrical Parts Specifications

    2-2. Electrical parts specifications Service Ref. Symbol PKFY-P24NKMU-E2R1.TH PKFY-P30NKMU-E2R1.TH Parts name Room temperature Resistance 30°F/15.8 kΩ, 50°F/9.6 kΩ, 70°F/6.0 kΩ, 80°F/4.8 kΩ, 90°F/3.9 kΩ, 100°F/3.2 kΩ TH21 thermistor Resistance 30°F/15.8 kΩ, 50°F/9.6 kΩ, 70°F/6.0 kΩ, 80°F/4.8 kΩ, 90°F/3.9 kΩ, 100°F/3.2 kΩ Liquid pipe thermistor TH22 TH23...

  • Page 5: Outlines And Dimensions

    OUTLINES AND DIMENSIONS Unit : in. (mm) OCH848...

  • Page 6: Wiring Diagram

    WIRING DIAGRAM TB15 TO MA-REMOTE DRAIN PUMP KIT CONTROLLER TO OUTDOOR UNIT (OPTION PART) DC8.7-13V BC CONTROLLER ME-REMOTE When attaching drain pump kit CONTROLLER When attaching drain (SHIELD) DRAIN PUMP KIT DC24-30V pump kit (OPTION (OPTION PART) PART), remove TO NEXT the jumper connector INDOOR CN4F...

  • Page 7: Refrigerant System Diagram

    REFRIGERANT SYSTEM DIAGRAM Gas pipe thermistor (1) TH23 Strainer (#50mesh) Gas pipe Gas pipe thermistor (2) TH24 Flare connection Liquid pipe thermistor TH22 Heat exchanger Liquid pipe Linear expansion valve Strainer1 (#50mesh) Room temparature thermistor TH21 Strainer2 (#100mesh) Strainer (#100mesh) Unit : mm (in.) Service Ref.

  • Page 8: Troubleshooting

    TROUBLESHOOTING 6-1. HOW TO CHECK THE PARTS Parts name Checkpoints Room temperature Disconnect the connector then measure the resistance with a tester. thermistor (TH21) (At the ambient temperature 50°F~86°F) Liquid pipe temperature Normal Abnormal thermistor (TH22) Refer to 7-1-1. 4.3 kΩ~9.6 kΩ Open or short Gas pipe temperature thermistor (TH23 ,24)
  • Page 9 <Output pulse signal and the valve operation> The output pulse shifts in the following order. Output Output Closing a valve : 1 → 2 → 3 → 4 → 1 (Phase) Opening a valve : 4 → 3 → 2 → 1 → 4 Ø1 Ø2 Note:...
  • Page 10 6-1-3. DC Fan motor (fan motor/indoor controller circuit board) Check method of DC fan motor (fan motor/indoor controller circuit board) Notes · High voltage is applied to the connecter (CNMF) for the fan motor. Pay attention to the service. · Do not pull out the connector (CNMF) for the motor with the power supply on. (It causes trouble of the indoor controller circuit board and fan motor.) Self check...
  • Page 11 6-2. Function of Dip switch Operation by switch Effective Switch Pole Function Remarks timing Thermistor<Room temperature> Built-in remote controller Indoor unit Address board position Filter clogging detection Provide Not provide <Initial setting> Filter cleaning sign 2,500 hr 100 hr 1 2 3 4 5 6 7 8 9 10 Fresh air intake Not effective Not effective...
  • Page 12 Effective Operation by switch Remarks Switch timing SW11 Address board 1s digit <Initial setting> SW12 SW11 How to set addresses address SW12 SW11 setting Example : If address is "3", remain SW12 SW12 (for over 10) at "0", and match SW11 (for 1 to 9) 10ths digit with "3".

  • Page 13: Test Point Diagram

    6-3. TEST POINT DIAGRAM 6-3-1. Indoor controller board CN105 CN2M LED1 M-NET transmission connecting wire IT Terminal Main power supply Vane motor (MV1,MV2) 24 − 30 VDC (non-polar) (Indoor unit : 220 − 240 V) 12 VDC pulse output CN60 CN24 Linear expansion valve(LEV) External heater...

  • Page 14: Switch Board

    CN301 6-3-2. Wireless remote controller board Connect to the indoor controller board (I.B) 6-3-3. Switch board CN303 Connect to the indoor controller board (I.B) 6-3-4. Address board Function setting SW12 SW11 SW14 Address setting Address setting Branch No. 10ths DIGIT 1s DIGIT OCH848...

  • Page 15: Disassembly Procedure

    DISASSEMBLY PROCEDURE NOTE: Turn OFF the power supply before disassembly. : Indicates the visible parts in the photos/figures. Be careful when removing heavy parts. : Indicates the invisible parts in the photos/figures. OPERATION PROCEDURE PHOTOS/FIGURES 1. REMOVING THE PANEL Photo 1 Screws (1) Press and unlock the knobs on both sides of the front grille Front grille...
  • Page 16 OPERATION PROCEDURE PHOTOS/FIGURES 3. REMOVING THE ELECTRICAL BOX Photo 4 Connect for ground Fixture (1) Remove the panel and the corner box. (Refer to procedure 1) (2) Remove the screw and hook of address board case. (3) Remove the front and side electrical box covers (each 1 screw).
  • Page 17 OPERATION PROCEDURE PHOTOS/FIGURES 6. REMOVING THE INDOOR FAN MOTOR AND THE Photo 7 LINE FLOW FAN Screw of the motor band Lead wire of pipe thermistor (1) Remove the panel and the corner box. (Refer to procedure (2) Remove the electrical box (Refer to procedure 2) and the nozzle assembly (Refer to procedure 4).
  • Page 18 OPERATION PROCEDURE PHOTOS/FIGURES 8. REMOVING THE HEAT EXCHANGER AND LEV Photo 11 (1) Remove the panel and the corner box. (Refer to procedure Heat exchanger (2) Remove the electrical box (Refer to procedure 3) and the nozzle assembly (Refer to procedure 4.). (3) Remove the water cut.

  • Page 19: Remote Controller

    REMOTE CONTROLLER 8-1. REMOTE CONTROLLER FUNCTIONS <PAR-41MAA> Controller interface The functions of the function buttons change depending on the screen. Refer to the button function guide that appears at the bottom of the LCD for the functions they serve on a given screen. When the system is centrally controlled, the button function guide that corresponds to the locked button will not appear.
  • Page 20 Display The main display can be displayed in two different modes: ˝Full˝ and ˝Basic˝. The initial setting is ˝Full˝. To switch to the ˝Basic˝ mode, change the setting on the Main display setting. (Refer to operation manual included with remote controller.) <Full mode>...
  • Page 21 Menu structure Main menu Operation Vane · Louver · Vent. (Lossnay) High power Comfort Manual vane angle 3D i-see Sensor Timer menu Timer ON/OFF timer Auto-OFF timer Weekly timer OU silent mode Energy saving Restriction Temp. range Operation locked Energy saving Auto return Schedule Initial setting menu...

  • Page 22: Settings Menu

    Continue from the previous page. Maintenance menu Error information Filter information Cleaning Auto descending panel Descending operation Descending adjustment Service menu Test run menu Test run Drain pump test run Maintenance information Model name input Serial No. input Dealer information input Initialize maintenance info.
  • Page 23 Main menu list Main Setting and display items Setting details menu Use to set the vane angle. Operation Vane · Louver · Vent. (Lossnay) • Select a desired vane setting. Use to turn ON/OFF the louver. • Select a desired setting from ˝ON˝ and ˝OFF.˝ Use to set the amount of ventilation.
  • Page 24 Main Setting and display items Setting details menu When connecting 2 remote controllers, one of them needs to be designated as Initial Basic Main/Sub setting setting a sub controller. Clock Use to set the current time. Daylight Set the daylight saving time. saving time The administrator password is required to make the settings for the following Administrator...
  • Page 25 < PAR-FL32MA > Controller interface Transmission area Transmission indicator Remote controller display Timer indicator *For explanation purposes, all of the items that appear in the display are shown. *All items are displayed when the Reset button is pressed. Operation areas ON/OFF button Temperature setting buttons Fan Speed button (Changes fan speed)
  • Page 26 <PAR-SL101A-E> Controller interface Transmission area Remote controller display Set Temperature buttons OFF/ON button Mode button (Changes operation mode) Fan Speed button (Changes fan speed) Airflow button (Changes up/ down airflow direction) i-see button* Timer ON button Menu button Timer OFF button SET/SEND button Weekly timer ON/OFF button* CANCEL button...

  • Page 27: Error Information

    8-2. ERROR INFORMATION When an error occurs, the following screen will appear. Check the error status, stop the operation, and consult your dealer. 1. Check code, error unit, refrigerant address, date and time of occur- Error information rence, model name, and serial number will appear. Error code 2502 The model name and serial number will appear only if the informa-...
  • Page 28 • Checking the error information Maintenance menu While no errors are occurring, page 2/2 of the error information can be viewed by selecting ˝Error information˝ from the Maintenance menu. Error information Filter information Errors cannot be reset from this screen. Cleaning Main menu: RETURN Cursor...

  • Page 29: Service Menu

    8-3. SERVICE MENU Maintenance password is required 1. Select ˝Service˝ from the Main menu, and press the [SELECT] button. Main Main menu *At the main display, the menu button and select ˝Service˝ to make Service the maintenance setting. 2. When the Service menu is selected, a window will appear asking for the pass- Service menu word.
  • Page 30 8-4. TEST RUN 8-4-1. PAR-41MAA 1. Select ˝Service˝ from the Main menu, and press the [SELECT] button. Test run Input maintenance info. Settings Check Others Select ˝Test run˝ with the F1 or F2 button, and press the [SELECT] button. Main menu: RETURN SELECT MENU RETURN...
  • Page 31 8-4-2. PAR-FL32MA Measure an impedance between the power supply terminal block on the outdoor unit and ground with a 500 V Megger and check that it is equal to or greater than 1.0 MΩ. TEST RUN 1. Turn on the main power to the unit. TEST RUN button twice continuously.

  • Page 32: Function Setting

    8-5. FUNCTION SETTING 8-5-1. PAR-41MAA Settings menu 1. Select ˝Service˝ from the Main menu, and press the [SELECT] button. Function setting Lossnay Select ˝Setting˝ from the Service menu, and press the [SELECT] button. Service menu: MENU Cursor Select ˝Function setting˝, and press the [SELECT] button. SELECT MENU RETURN...

  • Page 33: Error History

    8-6. ERROR HISTORY 1. Select ˝Service˝ from the Main menu, and press the [SELECT] button. Test run Input maintenance info. Settings Check Others Main menu: RETURN Select ˝Check˝ with the F1 or F2 button, and press the [SELECT] button. SELECT MENU RETURN HOLD...

  • Page 34: Self-Diagnosis

    8-7. SELF-DIAGNOSIS 8-7-1. PAR-41MAA 1. Select ˝Service˝ from the Main menu, and press the [SELECT] button. Diagnosis Self check Select ˝Check˝ from the Service menu, Remote controller check and press the [SELECT] button. Service menu: MENU Select ˝Diagnosis˝ from the Check menu, Cursor and press the [SELECT] button.
  • Page 35 8-7-2. PAR-FL32MA Malfunction-diagnosis method at maintenance service> < Refrigerant [Procedure] address 1. Press the CHECK button twice. display CHECK • ˝CHECK˝ lights, and refrigerant address ˝00˝ blinks. CHECK display • Check that the remote controller's display has stopped before continuing. Temperature button ON/OFF...

  • Page 36: Remote Controller Check

    8-8. REMOTE CONTROLLER CHECK If operations cannot be completed with the remote controller, diagnose the remote controller with this function. 1. Select ˝Service˝ from the Main menu, Diagnosis and press the [SELECT] button. Self check Remote controller check Select ˝Check˝ from the Service menu, Service menu: MENU and press the [SELECT] button.
  • Page 37 HEAD OFFICE : TOKYO BUILDING, 2-7-3, MARUNOUCHI, CHIYODA-KU TOKYO 100-8310, JAPAN Copyright 2023 MITSUBISHI ELECTRIC CORPORATION Published: Nov. 2023 No. OCH848 Specifications are subject to change without notice. Made in Japan...

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