Mitsubishi Electric City Multi PLFY Series Technical & Service Manual
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Mitsubishi Electric City Multi PLFY Series Technical & Service Manual

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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
Model name
indication
INDOOR UNIT
[Service Ref.]
CONTENTS
1. SAFETY PRECAUTION .......................... 2
3. SPECIFICATIONS ................................. 11
4. 4-WAY AIR FLOW SYSTEM ................. 14
6. WIRING DIAGRAM ............................... 17
8. TROUBLESHOOTING .......................... 19
9. DISASSEMBLY PROCEDURE ............. 26
PARTS CATALOG (OCB717)
October 2019
No. OCH717

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  • Page 1: Table Of Contents

    SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS October 2019 No. OCH717 TECHNICAL & SERVICE MANUAL Indoor unit [Model Name] [Service Ref.] 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 CONTENTS 1. SAFETY PRECAUTION ......2 2. PARTS NAMES AND FUNCTIONS ..3 3.

  • Page 2: Safety Precaution

    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

    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 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 5 Display The main display can be displayed in two different modes: “Full” and “Basic”. The factory 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 6 Menu structure Main menu Press the button. MENU Move the cursor to the desired item with the buttons, and press the button. SELECT Operation Vane · Louver · Vent. (Lossnay) High power Comfort Manual vane angle 3D i-see Sensor Timer menu Timer ON/OFF timer Auto-OFF timer...
  • Page 7 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 8 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 9 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 10 2-3. Wireless remote controller Transmission area Not available Remote controller display Battery replacement indicator 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...

  • Page 11: Specifications

    SPECIFICATIONS 3-1. SPECIFICATIONS Service Ref. PLFY-WL10VFM-E.TH PLFY-WL15VFM-E.TH PLFY-WL20VFM-E.TH PLFY-WL25VFM-E.TH PLFY-WL32VFM-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 Current input A 0.23 0.24 0.26 0.29 0.38 Heating capacity *2...
  • Page 12 3-2. ELECTRICAL PARTS SPECIFICATIONS Service ref. Symbol PLFY-WL10VFM-E.TH PLFY-WL15VFM-E.TH PLFY-WL20VFM-E.TH PLFY-WL25VFM-E.TH PLFY-WL32VFM-E.TH Parts name 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 13 3-4. NOISE CRITERION CURVES PLFY-WL10VFM-E.TH PLFY-WL15VFM-E.TH SPL(dB) LINE SPL(dB) LINE High High Medium Medium NC-70 NC-70 NC-60 NC-60 NC-50 NC-50 NC-40 NC-40 NC-30 NC-30 Approximate minimum Approximate minimum audible limit on NC-20 audible limit on NC-20 continuous noise continuous noise 1000 2000 4000...

  • Page 14: Way Air Flow System

    4-WAY AIR FLOW 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 15 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 16: Outlines And Dimensions

    OUTLINES AND DIMENSIONS PLFY-WL10VFM-E.TH PLFY-WL15VFM-E.TH PLFY-WL20VFM-E.TH PLFY-WL25VFM-E.TH PLFY-WL32VFM-E.TH Unit: mm OCH717...

  • Page 17: Wiring Diagram

    WIRING DIAGRAM PLFY-WL10VFM-E.TH PLFY-WL15VFM-E.TH PLFY-WL20VFM-E.TH PLFY-WL25VFM-E.TH PLFY-WL32VFM-E.TH 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 fig.1 (OG) (BU) Switches in the picture show “0”.

  • Page 18: Refrigerant System Diagram

    REFRIGERANT SYSTEM DIAGRAM PLFY-WL10VFM-E.TH PLFY-WL15VFM-E.TH PLFY-WL20VFM-E.TH PLFY-WL25VFM-E.TH PLFY-WL32VFM-E.TH Pipe temperature detection thermistor/ inlet TH22 Water inlet connection Manual air purge valve Pipe temperature detection thermistor/ outlet TH23 Water outlet connection Heat exchanger Room temperature detection thermistor TH21 Model PLFY-WL10/15/20/25/32VFM-E Item Water outlet I.D.

  • Page 19: Troubleshooting

    TROUBLESHOOTING 8-1. HOW TO CHECK THE PARTS PLFY-WL10VFM-E.TH PLFY-WL15VFM-E.TH PLFY-WL20VFM-E.TH PLFY-WL25VFM-E.TH PLFY-WL32VFM-E.TH Parts name Check points Thermistor (TH21) Disconnect the connector then measure the resistance with a tester. (Room temperature detection) (At the ambient temperature 10 to 30:) Thermistor (TH22) (Pipe temperature detection/inlet) Normal Abnormal...
  • Page 20 Parts name Check points Flow control valve Disconnect the connector then measure the resistance between terminals with a tester. (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...
  • Page 21 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 22 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 of controller board, so it is not possible to measure the resistance between the terminals.
  • Page 23 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 24 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 25 8-4. TEST POINT DIAGRAM Indoor controller board PLFY-WL10VFM-E.TH PLFY-WL15VFM-E.TH PLFY-WL20VFM-E.TH PLFY-WL25VFM-E.TH PLFY-WL32VFM-E.TH CN3M CN2A M-NET transmission connecting wire MA-Remote controller 24-30 V DC (non polar) 8.7-13 V DC (non-polar) – LED2 Vane motor (MV) Power supply 12 V pulse output (Wired remote controller) SW21 CN52...

  • Page 26: Disassembly Procedure

    DISASSEMBLY PROCEDURE PLFY-WL10VFM-E.TH PLFY-WL15VFM-E.TH PLFY-WL20VFM-E.TH PLFY-WL25VFM-E.TH PLFY-WL32VFM-E.TH Be careful when removing heavy parts. 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 27 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 28 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 29 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 30 HEAD OFFICE : TOKYO BUILDING, 2-7-3, MARUNOUCHI, CHIYODA-KU TOKYO 100-8310, JAPAN cCopyright 2019 MITSUBISHI ELECTRIC CORPORATION Specifications are subject to change without notice. Published in Oct. 2019 No. OCH717 Made in Japan...

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