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Mitsubishi Electric CITI MULTI PLFY Series Technical & Service Manual
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Mitsubishi Electric CITI 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-WL10VFM-E.TH
PLFY-WL10VFM-E
PLFY-WL15VFM-E.TH
PLFY-WL15VFM-E
PLFY-WL20VFM-E.TH
PLFY-WL20VFM-E
PLFY-WL25VFM-E.TH
PLFY-WL25VFM-E
PLFY-WL32VFM-E.TH
PLFY-WL32VFM-E
PLFY-WL40VFM-E.TH
PLFY-WL40VFM-E
Model name
indication
INDOOR UNIT
[Service Ref.]
December 2020
REVISED EDITION-A
Notes:
• PLFY-WL40VFM-E.TH
has been added.
• Some descriptions
have been modified in
REVISED EDITION-A.
OCH717 is void.
CONTENTS
1. SAFETY PRECAUTION ........................ 2
2. PARTS NAMES AND FUNCTIONS ...... 3
3. SPECIFICATIONS ................................. 4
4. 4-WAY AIRFLOW SYSTEM .................. 7
5. OUTLINES AND DIMENSIONS ............ 9
6. WIRING DIAGRAM ............................. 10
7. REFRIGERANT SYSTEM DIAGRAM .... 11
8. TROUBLESHOOTING ........................ 12
9. DISASSEMBLY PROCEDURE ........... 19
10. REMOTE CONTROLLER .................... 23
PARTS CATALOG (OCB717)
No. OCH717

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Summary of Contents for Mitsubishi Electric CITI MULTI PLFY Series

  • Page 1 SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS December 2020 No. OCH717 REVISED EDITION-A TECHNICAL & SERVICE MANUAL Indoor unit Notes: [Model Name] [Service Ref.] • PLFY-WL40VFM-E.TH PLFY-WL10VFM-E.TH has been added. PLFY-WL10VFM-E • Some descriptions have been modified in PLFY-WL15VFM-E.TH REVISED EDITION-A. PLFY-WL15VFM-E OCH717 is void.
  • Page 2 Indicates a parts that requires grounding. ing the safety features for these devices, or the use of accessories other than the ones that are recommended by Mitsubishi Electric may result in smoke, Indicates that caution must be taken with rotating parts. (This fire, or explosion.
  • Page 3 PARTS NAMES AND FUNCTIONS 2-1. Indoor Unit Filter Removes dust and pollutants drawn from the air. Horizontal Air Outlet 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 4 SPECIFICATIONS 3-1. SPECIFICATIONS Service Ref. PLFY-WL 10VFM-E.TH 15VFM-E.TH 20VFM-E.TH 25VFM-E.TH 32VFM-E.TH 40VFM-E.TH Power source single phase, 220-240 V, 50 Hz / 220 V, 60 Hz Cooling capacity *1 Power input kW 0.02 0.02 0.02 0.03 0.04 0.05 Current input A 0.23 0.24 0.26...
  • Page 5 3-2. ELECTRICAL PARTS SPECIFICATIONS Service ref. PLFY-WL Symbol Parts name 10VFM-E.TH 15VFM-E.TH 20VFM-E.TH 25VFM-E.TH 32VFM-E.TH 40VFM-E.TH Thermistor (Room temperature TH21 Resistance 0:/15 ", 10:/9.6 ", 20:/6.3 ", 25:/5.4 ", 30:/4.3 ", 40:/3.0 " detection) Thermistor (Pipe temperature TH22 Resistance 0:/15 ", 10:/9.6 ", 20:/6.3 ", 25:/5.4 ", 30:/4.3 ", 40:/3.0 " detection/inlet) Thermistor (Pipe temperature...
  • Page 6 3-4. NOISE CRITERION CURVES PLFY-WL10VFM-E.TH PLFY-WL15VFM-E.TH PLFY-WL20VFM-E.TH SPL(dB) LINE SPL(dB) LINE SPL(dB) LINE High High High Medium Medium Medium NC-70 NC-70 NC-70 NC-60 NC-60 NC-60 NC-50 NC-50 NC-50 NC-40 NC-40 NC-40 NC-30 NC-30 NC-30 Approximate minimum Approximate minimum Approximate minimum audible limit on NC-20 audible limit on...
  • Page 7 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 Burring hole Cut out hole 120°...
  • Page 8 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.
  • Page 9 OUTLINES AND DIMENSIONS Unit: mm OCH717A...
  • Page 10 WIRING DIAGRAM OCH717A...
  • Page 11 REFRIGERANT SYSTEM DIAGRAM Pipe temperature detection thermistor/ inlet TH22 Water inlet connection Water flow Manual air purge valve Pipe temperature detection thermistor/ outlet TH23 Water outlet connection Water flow Heat exchanger Room temperature detection thermistor TH21 WATER PIPE CONNECTION SIZE Service Ref.
  • Page 12 TROUBLESHOOTING 8-1. 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:) Thermistor (TH22) Refer to “8-1-1. Thermistor Characteristic Graph”. (Pipe temperature detection/inlet) Thermistor (TH23) (Pipe temperature detection/outlet)
  • Page 13 Parts name Checkpoints Flow control valve Disconnect the connector then measure the resistance between terminals with a multimeter. (FCV) CN8A Refer to "8-1-2. Flow control valve". Yellow Orange Normal Abnormal Green Blue Purple-Brown Orange-Brown Blue-Brown Green-Brown Open or short Purple (Optional parts) White 55 Ω...
  • Page 14 8-1-2. Flow control valve 1) Summary of flow control valve (FCV) operation The FCV is operated by a stepping motor, which operates by receiving a pulse signal from the indoor control board. The FCV position changes in response to the pulse signal. Flow control valve Control board Connector...
  • Page 15 8-1-3. Drain pump Purple Black 1. Check if the drain float switch works properly. 2. Check if the drain pump works and drains water properly in cooling operation. 3. If no water drains, confirm that the check code 2502 will not be displayed 10 minutes after the operation starts. Note: The drain pump for this model is driven by the internal DC motor, so it is not possible to measure the resistance between the terminals.
  • Page 16 8-2. 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 17 Operation by switch Effective Switch Pole Function Remarks timing Setting ceiling height Depends on SW21-1, SW21-2 <Initial setting> Under — — operation — — 1 2 3 4 5 6 suspension — — SW21 — — Function selection SW21-1 SW21-2 Height Silent ─...
  • Page 18 8-3. TEST POINT DIAGRAM Indoor controller board CN3M CN2A M-NET transmission connecting wire MA-Remote controller 24-30 VDC (non polar) 8.7-13 VDC (non-polar) – LED2 Vane motor (MV) Power supply 12 V pulse output (Wired remote controller) SW21 CN52 Number of air outlets and height Remote indicator of the ceiling –...
  • Page 19 DISASSEMBLY PROCEDURE Be careful when removing heavy parts. : Indicates the visible parts in the photos/figures. OPERATING PROCEDURE PHOTOS/ FIGURES Figure 1 1. Removing the air intake grille and air filter (1) Slide the knob of air intake grille to the direction of the arrow Grille hook Air intake grille 1 to open the air intake grille.
  • Page 20 OPERATING PROCEDURE PHOTOS/ FIGURES 3. Removing the electrical parts Control box cover Photo 4 (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 21 OPERATING PROCEDURE PHOTOS/ FIGURES 6. Removing the pipe temperature thermistor/ inlet (TH22) Photo 8 Pipe temperature and pipe temperature thermistor/ outlet (TH23) thermistor/ outlet (TH23) (1) Remove the panel. (Refer to procedure 2) Band (2) Remove the room temperature thermistor (TH21). (Refer to procedure 4) (3) Remove the drain pan.
  • Page 22 OPERATING PROCEDURE PHOTOS/ FIGURES 8. Removing the drain pump (DP) and float switch (FS) Photo 11 Clamp (1) Remove the panel. (Refer to procedure 2) (2) Remove the room temperature thermistor (TH21). (Refer to Screw Inner cover procedure 4) (3) Remove the control box cover. (Refer to procedure 3) (4) Remove the drain pan.
  • Page 23 REMOTE CONTROLLER 10-1. REMOTE CONTROLLER FUNCTIONS <PAR-40MAA> 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 24 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 25 Menu structure Main menu Press the button. Move the cursor to the desired item with the buttons, and press the button. 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...
  • Page 26 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 27 Main menu list Main Setting and display items Setting details menu Operation Vane · Louver · Vent. Use to set the vane angle. (Lossnay) • Select a desired vane setting from 5 different settings. Use to turn ON/OFF the louver. •...
  • Page 28 Main Setting and display items Setting details menu Initial Basic Main/Sub When connecting 2 remote controllers, one of them needs to be designated as setting setting a sub controller. 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...
  • Page 29 <PAR-SL97A-E> 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) Timer Off button...
  • Page 30 <PAR-SL100A-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...
  • Page 31 <PAR-U02MEDA> Controller interface ▌1 Occupancy Sensor The occupancy sensor detects vacancy for energy saving control. ▌2 Brightness Sensor The brightness sensor detects the brightness of the room for energy saving control. ▌3 Temperature & Humidity Sensor The sensor detects the room temperature and the relative humidity. ▌4 LED Indicator The LED indicator indicates the operation status in different colors.
  • Page 32 2. Press the F4 button or the button to reset the error Error information that is occurring. Error code Error unit Unit#1 Time Occurred 2/ 1 4:48 Model name Errors cannot be reset while the ON/OFF operation is prohibited. Serial No. Reset error: Reset button Page Reset...
  • Page 33 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 34 10-4. TEST RUN 10-4-1. PAR-40MAA 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 35 10-4-2. PAR-SL97A-E Measure an impedance between the power supply terminal block on the outdoor unit and ground with a 500V Megger and check that it is equal to or greater than 1.0MΩ. TEST RUN 1. Turn on the main power to the unit. TEST RUN 2.
  • Page 36 10-4-4. PAR-U02MEDA Test run [MON] 10:45 Test run Fan speed Air direction Address Remain 2:00 　 ＞ 　 ＞ Pipe 　 ＞ 　 ＞ 9.0°C 　 ＞ 　 ＞ 　 ＞ 　 ＞ Swing Auto Louver LOSSNAY 　 ＞ 　 ＞ 　...
  • Page 37 10-5. FUNCTION SETTING 10-5-1. PAR-40MAA 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 38 10-5-2. PAR-SL97A-E Functions can be selected with the wireless remote controller. Function selection using wireless remote controller is available only for refriger- ant system with wireless function. Refrigerant address cannot be specified by the wireless remote controller. [Flow of function selection procedure] Flow of function selection procedure The flow of the function selection procedure is shown below.
  • Page 39 10-5-3. PAR-SL100A-E 1. Going to the function select mode Press the button between of 5 seconds. (Start this operation from the status of remote controller display turned off.) [CHECK] is lit and ˝00˝ blinks. (Fig. 10-1) Press the button to set the ˝50˝. Direct the wireless remote controller toward the receiver of the indoor unit and press the button.
  • Page 40 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 41 10-7. SELF-DIAGNOSIS 10-7-1. PAR-40MAA 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 42 10-7-2. PAR-SL97A-E When a malfunction occurs to air conditioner, both indoor unit and outdoor unit will stop and operation lamp blinks to inform unusual stop. < Malfunction-diagnosis method at maintenance service> Refrigerant [Procedure] address display 1. Press the CHECK button twice. CHECK •...
  • Page 43 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 44 10-9. SPECIAL FUNCTION OPERATION SETTING <PAR-U02MEDA> *M-NET remote controller cannot be connected with a refrigerant system which includes branch box. It is necessary to perform “group settings” and “Interlocked LOSSNAY” at making group settings of different refrigerant systems (multiple outdoor unit). (A) Group settings: Enter the indoor unit controlled by the remote controller, check the content of entries, and clear entries, etc.
  • Page 45 (a) Group setting Use this screen to register the indoor units and the AHC to be controlled from the controller. 1. Select an indoor unit or an AHC address in the [Address] field. [Group setting] The number of units that can be registered. Indoor unit: 16 units maximum Address AHC: 1 unit maximum...
  • Page 46 HEAD OFFICE : TOKYO BUILDING, 2-7-3, MARUNOUCHI, CHIYODA-KU TOKYO 100-8310, JAPAN cCopyright 2019 MITSUBISHI ELECTRIC CORPORATION Issued: Dec. 2020 No. OCH717 REVISED EDITION-A Specifications are subject to change without notice. Published in Oct. 2019 No. OCH717 Made in Japan...

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