Mitsubishi Electric CITY MULTI PLFY Series 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]
PLFY-MS15VFM-E
PLFY-MS15VFM-ET
PLFY-MS20VFM-E
PLFY-MS20VFM-ET
PLFY-MS25VFM-E
PLFY-MS25VFM-ET
PLFY-MS32VFM-E
PLFY-MS32VFM-ET
PLFY-MS40VFM-E
PLFY-MS40VFM-ET
PLFY-MS50VFM-E
PLFY-MS50VFM-ET
Model name
indication
INDOOR UNIT
[Service Ref.]
PLFY-MS15VFM-E.TH
PLFY-MS15VFM-ET.TH
PLFY-MS20VFM-E.TH
PLFY-MS20VFM-ET.TH
PLFY-MS25VFM-E.TH
PLFY-MS25VFM-ET.TH
PLFY-MS32VFM-E.TH
PLFY-MS32VFM-ET.TH
PLFY-MS40VFM-E.TH
PLFY-MS40VFM-ET.TH
PLFY-MS50VFM-E.TH
PLFY-MS50VFM-ET.TH
R32
Notes:
• This manual describes only
service data of the indoor units.
CONTENTS
1. SAFETY PRECAUTION ······················· 2
2. PARTS NAMES AND FUNCTIONS ········ 8
3. SPECIFICATIONS ······························ 9
4. 4-WAY AIRFLOW SYSTEM ················ 11
5. OUTLINES AND DIMENSIONS ··········· 13
6. WIRING DIAGRAM ··························· 14
8. TROUBLESHOOTING ······················· 17
9. DISASSEMBLY PROCEDURE ············ 25
10. REMOTE CONTROLLER ··················· 31
PARTS CATALOG (OCB822)
July 2023
No. OCH822
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Table of Contents
Related Manuals for Mitsubishi Electric CITY MULTI PLFY Series
Summary of Contents for Mitsubishi Electric CITY MULTI PLFY Series
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Page 1: Table Of Contents
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS July 2023 No. OCH822 TECHNICAL & SERVICE MANUAL Indoor unit [Model Name] [Service Ref.] PLFY-MS15VFM-E.TH PLFY-MS15VFM-E Notes: PLFY-MS15VFM-ET.TH PLFY-MS15VFM-ET • This manual describes only service data of the indoor units. PLFY-MS20VFM-E.TH PLFY-MS20VFM-E PLFY-MS20VFM-ET.TH PLFY-MS20VFM-ET PLFY-MS25VFM-E.TH PLFY-MS25VFM-E PLFY-MS25VFM-ET.TH PLFY-MS25VFM-ET... -
Page 2: Safety Precaution
SAFETY PRECAUTION MEANINGS OF SYMBOLS DISPLAYED ON THE UNIT This mark is for R32 refrigerant only. Refrigerant type is written on nameplate of outdoor unit. WARNING Read the OPERATION MANUAL carefully before operation. Service personnel are required to carefully read the OPERATION MANUAL and INSTALLATION MANUAL before operation. Further information is available in the OPERATION MANUAL, INSTALLATION MANUAL, and the like. -
Page 3: Cautions For Service
[1] Warning for service (1) Do not alter the unit. (2) For installation and relocation work, follow the instructions in the Installation Manual and use tools and pipe components specifically made for use with refrigerant specified in the outdoor unit installation manual. (3) Ask a dealer or an authorized technician to install, relocate and repair the unit. - Page 4 [4] Cautions for unit using R32 refrigerant Basic work procedures are the same as those for conventional units using refrigerant R410A. However, pay careful attention to the following points. (1) Information on servicing (1-1) Checks on the Area Prior to beginning work on systems containing flammable refrigerants, safety checks are necessary to ensure that the risk of ignition is minimized.
- Page 5 (3) Repair to intrinsically Safe Components Do not apply any permanent inductive or capacitance loads to the circuit without ensuring that this will not exceed the permissible voltage and current permitted for the equipment in use. Intrinsically safe components are the only types that can be worked on while live in the presence of a flammable atmosphere.
- Page 6 a) Become familiar with the equipment and its operation. b) Isolate system electrically. c) Before attempting the procedure, ensure that: • mechanical handling equipment is available, if required, for handling refrigerant cylinders; • all personal protective equipment is available and being used correctly; •...
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Page 7: Service Tools
Unit Electronic weighing scale [1] Service tools Use the below service tools as exclusive tools for R32 refrigerant. Tool name Specifications · Only for R32 · Use the existing fitting specifications . (UNF1/2) Gauge manifold · Use high-tension side pressure of 5.3MPa·G or over. ·... -
Page 8: Parts Names And Functions
PARTS NAMES AND FUNCTIONS 2-1. Indoor Unit Filter Removes dust and pollutants Horizontal Air Outlet from drawn in air. Sets horizontal airflow automatically during cooling or dehumidifying. Grille Auto Air Swing Vane Disperses airflow up and down and adjusts the angle of airflow direction. -
Page 9: Specifications
SPECIFICATIONS 3-1. SPECIFICATIONS Model PLFY-MS15VFM-E PLFY-MS20VFM-E PLFY-MS25VFM-E PLFY-MS32VFM-E PLFY-MS40VFM-E PLFY-MS50VFM-E PLFY-MS15VFM-ET PLFY-MS20VFM-ET PLFY-MS25VFM-ET PLFY-MS32VFM-ET PLFY-MS40VFM-ET PLFY-MS50VFM-ET power source 1-phase 220-240 V 50 Hz, 1-phase 220 V 60 Hz cooling capacity *1 kW *1 kcal/h 1,450 1,900 2,400 3,100 3,900 4,800 *1 BTU/h 5,800 7,500... -
Page 10: Electrical Parts Specifications
3-2. ELECTRICAL PARTS SPECIFICATIONS Service ref. PLFY-MS15VFM-E.TH PLFY-MS20VFM-E.TH PLFY-MS25VFM-E.TH PLFY-MS32VFM-E.TH PLFY-MS40VFM-E.TH PLFY-MS50VFM-E.TH Symbol PLFY-MS15VFM-ET.TH PLFY-MS20VFM-ET.TH PLFY-MS25VFM-ET.TH PLFY-MS32VFM-ET.TH PLFY-MS40VFM-ET.TH PLFY-MS50VFM-ET.TH Parts name Thermistor (Room temperature TH21 Resistance 0°C/15 Ω, 10°C/9.6 Ω, 20°C/6.3 Ω, 25°C/5.4 Ω, 30°C/4.3 Ω, 40°C/3.0 Ω detection) Thermistor (Pipe temperature TH22 Resistance 0°C/15 Ω, 10°C/9.6 Ω, 20°C/6.3 Ω, 25°C/5.4 Ω, 30°C/4.3 Ω, 40°C/3.0 Ω... -
Page 11: Way Airflow System
4-WAY AIRFLOW SYSTEM 4-1. FRESH AIR INTAKE (Location for installation) At the time of installation, use the duct holes (cut out) located at the positions shown in following diagram, as and when required. Fresh air intake Detail drawing of fresh air intake (mm) Burring holes Cutout hole... - Page 12 4-4. FIXING HORIZONTAL VANE Horizontal vane of each air outlet can be fixed according to the environment where it is installed. Setting procedures 1) Turn off a main power supply (Turn off a breaker). 2) Disconnect the vane motor connector of the direction of the arrow with pressing the unlocking button as shown in figure below.
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Page 13: Outlines And Dimensions
OUTLINES AND DIMENSIONS Unit: mm OCH822... -
Page 14: Wiring Diagram
WIRING DIAGRAM PLFY-MS15VFM-E PLFY-MS20VFM-E PLFY-MS25VFM-E PLFY-MS32VFM-E PLFY-MS40VFM-E PLFY-MS50VFM-E Detail of SW11, SW12 and SW14 GRILLE i-see Sensor SW14 SW12 SW11 TO NEXT CORNER PANEL INDOOR (OPTION PART) UNIT PULL i-see Sensor BRANCH No. 10s DIGIT 1s DIGIT FUSE(16A) See table 1 Switches in the picture show “0”. - Page 15 PLFY-MS15VFM-ET PLFY-MS20VFM-ET PLFY-MS25VFM-ET PLFY-MS32VFM-ET PLFY-MS40VFM-ET PLFY-MS50VFM-ET SW11,SW12 ve SW14 detayları IZGARA i-see Sensör SW14 SW12 SW11 KÖŞE PANELİ SONRAKİ İÇ (İSTEĞE BAĞLI PARÇA) ÜNİTEYE BUAT i-see Sensör BÖLÜM No. 10. BASAMAK 1. BASAMAK SİGORTA Tablo 1'e bakın (16A) Görseldeki siviç pozisyonları “0”ı göstermektedir. SW21 SW22 SW14...
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Page 16: Refrigerant System Diagram
REFRIGERANT SYSTEM DIAGRAM Refrigerant flow in cooling Refrigerant flow in heating Strainer (#50mesh) Thermistor (Pipe temperature detection/Gas) TH23 Gas pipe Thermistor (Pipe temperature detection/Liquid) TH22 Flare connection Liquid pipe Heat exchanger Linear expansion valve Strainer1 (#50mesh) Strainer2 (#100mesh) Strainer (#100mesh) Thermistor (Room temperature detection) TH21 Unit: mm (inch) Gas pipe... -
Page 17: Troubleshooting
TROUBLESHOOTING 8-1. COUNTERMEASURES FOR ERROR DURING TEST RUN If a problem occurs during test run, a code number will appear on the remote controller (or LED on the outdoor unit), and the air conditioning system will automatically cease operating. Refer to the connected outdoor unit service manual in order to determine the nature of the abnormality and apply corrective measure. -
Page 18: How To Check The Parts
8-2. HOW TO CHECK THE PARTS Parts name Checkpoints Thermistor (TH21) Disconnect the connector then measure the resistance with a multimeter. (Room temperature detection) (At the ambient temperature 10 to 30°C) Thermistor (TH22) (Pipe temperature detection/Liquid) Normal Abnormal Thermistor (TH23) Refer to “8-2-1. -
Page 19: Linear Expansion Valve
8-2-1. Thermistor Characteristic Graph Thermistor (TH21) < Thermistor for lower temperature > Thermistors for (Room temperature detection) lower temperature Thermistor (TH22) (Pipe temperature detection/Liquid) Thermistor (TH23) (Pipe temperature detection/Gas) Thermistor R =15 kΩ ± 3% Fixed number of B=3480 ± 2% Rt=15exp { 3480( 273+t 0°C... - Page 20 <Output pulse signal and the valve operation> Output Output (Phase) The output pulse shifts in the following order. Closing a valve : 1 → 2 → 3 → 4 → 1 Ø1 Opening a valve : 4 → 3 → 2 → 1 → 4 Ø2 •...
- Page 21 8-2-3. DC Fan Motor (Fan Motor/Indoor Controller Board) Check method of indoor fan motor (fan motor/indoor controller 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 board and fan motor.) Self check Conditions : The indoor fan cannot turn around.
- Page 22 8-3. FUNCTION OF DIP SWITCH Operation by switch Effective Switch Pole Function Remarks timing Thermistor Built-in remote <Room temperature Indoor unit controller detection> position Filter clogging Provided Not provided detection Filter cleaning 2,500h 100h Indoor controller board Fresh air intake Effective Not effective Under...
- Page 23 Operation by switch Effective Switch Pole Function Remarks timing Setting ceiling height Depends on SW21-1, SW21-2 <Initial setting> Under — — operation — — suspension 1 2 3 4 5 6 — — SW21 — — Function selection SW21-1 SW21-2 Height Silent ─...
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Page 24: Test Point Diagram
8-4. TEST POINT DIAGRAM CN2A CN3M MA-Remote controller M-NET transmission connecting wire Indoor controller board 8.7–13 VDC (non-polar) 24–30 VDC (non-polar) Vane motor output 12 VDC pulse SW21 Ceiling height and discharge outlet number selector SW14 Branch No. LED2 Power supply for SW12 MA-Remote controller Address setting 10s digit... -
Page 25: Disassembly Procedure
DISASSEMBLY PROCEDURE Be careful when removing heavy parts. OPERATING PROCEDURE PHOTOS/FIGURES Photo 1 1. Removing the intake grille and air filter Grille hook (1) Slide the levers in the direction indicated by the arrow to open the intake grille. Intake grille (2) Unlatch the hook that secures the grille. - Page 26 OPERATING PROCEDURE PHOTOS/FIGURES 3. Removing the electrical parts Photo 4 Control box cover (1) Loosen the 2 screws on the control box cover. (2) Slide the control box cover as indicated by the arrow to remove. <Electrical parts in the control box> •...
- Page 27 OPERATING PROCEDURE PHOTOS/FIGURES 6. Removing the pipe temperature thermistor/liquid (TH22) Photo 8-1 and pipe temperature thermistor/gas (TH23) Fan motor Pipe temperature (1) Remove the panel. (Refer to procedure 2) Band cable thermistor/Gas (TH23) (2) Remove the room temperature thermistor (TH21). (Refer to procedure 4) (3) Remove the drain pan.
- Page 28 OPERATING PROCEDURE PHOTOS/FIGURES 8. Removing the fan motor (MF) Photo 9 Clamps Motor lead (1) Remove the panel. (Refer to procedure 2) cover Band (2) Remove the room temperature thermistor (TH21). (Refer to procedure 4) (3) Remove the drain pan. (Refer to procedure 5) Turbo fan (See Photo 3) (4) Remove the nut and washer from the turbo fan.
- Page 29 OPERATING PROCEDURE PHOTOS/FIGURES Photo 11 9. Removing the drain pump (DP) and float switch (FS) Clamp (1) Remove the panel. (Refer to procedure 2) (2) Remove the room temperature thermistor (TH21). Screw (Refer to procedure 4) Inner cover (3) Remove the control box cover. (Refer to procedure 3) (4) Remove the drain pan.
- Page 30 OPERATING PROCEDURE PHOTOS/FIGURES 11. Removing the LEV coil Photo 15 LEV coil (1) Remove the heat exchanger. (2) Cut the band. (3) Rotate the LEV coil and remove it. Lead wire Note: When reattaching the LEV coil (See Photo 15 and 16) (1) Install the LEV coil in the direction shown in Photo 16.
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Page 31: Remote Controller
REMOTE CONTROLLER 10-1. REMOTE CONTROLLER FUNCTIONS <PAR-41MAAB> 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 32 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>...
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Page 33: Menu Structure
Menu structure Main menu Press the button. Move the cursor to the desired item with the buttons, and press the button. Operation Vane · 3D i-see · Vent. (Lossnay) High power Comfort Manual vane angle Vertical air direction Horizontal air direction 3D i-see Sensor Timer menu Timer... - Page 34 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 Refrigerant system check Maintenance information Collect model names and serial No. Model name input Serial No.
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Page 35: Main Menu List
Main menu list Main Setting and display items Setting details menu Operation Vane · 3D i-see · Vent. Vane: Use to set the vertical air direction. (Vane.Vent. (Lossnay)) Louver: Use to set the horizontal air direction. 3D i-see Sensor: This setting is available only for the air conditioners that support easy setting function of motion sensing air direction. - Page 36 Main Setting and display items Setting details menu Initial Basic Main/Supervisor For a system that requires supervisor remote controller, set the remote setting setting controller to "Supervisor" from this setting. Clock Use to set the current time. Daylight Set the daylight saving time. saving time Administrator The administrator password is required to make the settings for the following...
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Page 37: Controller Interface
<PAR-SL97A-E> Transmission area Controller interface 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) Timer Off button... - Page 38 <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/ i-see button* down airflow direction) Timer ON button Menu button Timer OFF button SET/SEND button Weekly timer ON/OFF button* CANCEL button...
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Page 39: Error Information
10-2. 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 40 • Checking the error information While no errors are occurring, page 2/2 of the error information can be Maintenance menu viewed by selecting ˝Error information˝ from the Maintenance menu. Error information Filter information Errors cannot be reset from this screen. Cleaning Main menu: Cursor...
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Page 41: Service Menu
10-3. SERVICE MENU Maintenance password is required 1. Select ˝Service˝ from the Main menu, and press the [ ] 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 42: Test Run Operation
10-4. TEST RUN 10-4-1. PAR-41MAAB 1. Select ˝Service˝ from the Main menu, and press the [ ] button. Test run Input maintenance info. Settings Check Others Select ˝Test run˝ with the F1 or F2 button, and press the [ ] button. 2. - Page 43 10-4-2. PAR-SL97A-E 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 2.
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Page 44: Function Setting
10-5. FUNCTION SETTING 10-5-1. PAR-41MAAB Settings menu 1. Select ˝Service˝ from the Main menu, and press the [ ] button. Function setting Lossnay Select ˝Setting˝ from the Service menu, and press the [ ] button. Service menu: Cursor Select ˝Function setting˝, and press the [ ] button. -
Page 45: Error History
10-6. ERROR HISTORY 1. Select ˝Service˝ from the Main menu, and press the [ ] button. Test run Input maintenance info. Settings Check Others Select ˝Check˝ with the F1 or F2 button, and press the [ button. 2. Select ˝Error history˝ with the F1 or F2 button, and press Check menu the [ ] button. -
Page 46: Self-Diagnosis
10-7. SELF-DIAGNOSIS 10-7-1. PAR-41MAAB 1. Select ˝Service˝ from the Main menu, and press the [ ] button. Diagnosis Self check Select ˝Check˝ from the Service menu, Remote controller check and press the [ ] button. Service menu: Select ˝Diagnosis˝ from the Check menu, Cursor and press the [ ] button. - Page 47 10-7-2. PAR-SL97A-E < Malfunction-diagnosis method at maintenance service> Refrigerant [Procedure] address display 1. Press the CHECK button twice. CHECK • ˝CHECK˝ lights, and refrigerant address ˝00˝ blinks. CHECK display • Check that the remote controller's display has stopped before continuing. Temperature button TEMP...
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Page 48: Remote Controller Check
10-8. 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 [ ] button. Self check Remote controller check Select ˝Check˝ from the Service menu, Service menu: and press the [ ] button. - Page 49 HEAD OFFICE : TOKYO BUILDING, 2-7-3, MARUNOUCHI, CHIYODA-KU TOKYO 100-8310, JAPAN ©Copyright 2023 MITSUBISHI ELECTRIC CORPORATION Published: Jul. 2023 No. OCH822 Specifications are subject to change without notice. Made in Japan...
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