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Mitsubishi Electric PLFY Series Technical & Service Manual

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SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
TECHNICAL & SERVICE MANUAL
Indoor unit
[Model Name]
PLFY-P15VCM-E3
PLFY-P20VCM-E3
PLFY-P25VCM-E3
PLFY-P32VCM-E3
PLFY-P40VCM-E3
INDOOR UNIT
Model name
indication
[Service Ref.]
PLFY-P15VCM-E3.TH
PLFY-P20VCM-E3.TH
PLFY-P25VCM-E3.TH
PLFY-P32VCM-E3.TH
PLFY-P40VCM-E3.TH
R410A
R407C
Note:
• This manual describes service data
of the indoor units only.
• RoHS compliant products have
<G> mark on spec name plate.
CONTENTS
1. SAFETY PRECAUTION .......................... 2
3. SPECIFICATIONS ................................. 14
4. 4-WAY AIR FLOW SYSTEM ................. 16
6. WIRING DIAGRAM ............................... 19
8. TROUBLESHOOTING .......................... 21
9. DISASSEMBLY PROCEDURE ............. 29
PARTS CATALOG (OCB569)
June 2014
No.OCH569
R22

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Summary of Contents for Mitsubishi Electric PLFY Series

  • Page 1: Table Of Contents

    SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS June 2014 No.OCH569 TECHNICAL & SERVICE MANUAL R410A R407C Indoor unit Note: [Model Name] [Service Ref.] • This manual describes service data PLFY-P15VCM-E3.TH of the indoor units only. PLFY-P15VCM-E3 • RoHS compliant products have PLFY-P20VCM-E3.TH <G>...

  • Page 2: Safety Precaution

    SAFETY PRECAUTION CAUTIONS RELATED TO NEW REFRIGERANT Cautions for units utilizing refrigerant R407C Do not use the existing refrigerant piping. Do not use a refrigerant other than R407C. The old refrigerant and lubricant in the existing piping If another refrigerant (R22, etc.) is used, the chlorine in the contain a large amount of chlorine which may cause the refrigerant may cause the lubricant deterioration.
  • Page 3 [1] Cautions for service · After recovering the all refrigerant in the unit, proceed to working. · Do not release refrigerant in the air. · After completing the repair service, recharge the cycle with the specified amount of liquid refrigerant. [2] Refrigerant recharging (1) Refrigerant recharging process 1Direct charging from the cylinder.
  • Page 4 Cautions for units utilizing refrigerant R410A Use the following tools specifically designed for Do not use the existing refrigerant piping. use with R410A refrigerant. The old refrigerant and lubricant in the existing piping The following tools are necessary to use R410A refrigerant. contains a large amount of chlorine which may cause the Tools for R410A lubricant deterioration of the new unit.
  • Page 5 [1] Cautions for service (1) Perform service after recovering the refrigerant left in unit completely. (2) Do not release refrigerant in the air. (3) After completing service, charge the cycle with specified amount of refrigerant. (4) When performing service, install a filter drier simultaneously. Be sure to use a filter drier for new refrigerant.

  • Page 6: Parts Names And Functions

    PARTS NAMES AND FUNCTIONS 2-1. Indoor Unit Filter Removes dust and pollutants from drawn in 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 7 2-2. WIRED REMOTE CONTROLLER <PAR-30MAA/PAR-31MAA> Wired remote controller function The functions which can be used are restricted according to each model. : Supported : Unsupported PAR-30MAA/PAR-31MAA Function PAR-21MAA Slim City multi Body Product size H × W × D (mm) 120 ×...
  • Page 8 Room Set temp. Cool Auto Mode Temp. 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. <Full mode> <Basic mode>...
  • Page 9 Menu structure Press the button. MENU Main menu Move the cursor to the desired item with the buttons, and press the button. SELECT Vane · Louver · Vent. (Lossnay) High power Timer On / Off timer Auto-Off timer Weekly timer Restriction Temp.
  • Page 10 Main menu list Setting and display items Setting details Vane · Louver · Vent. Use to set the vane angle. (Lossnay) • Select a desired vane setting from five different settings. Use to turn ON / OFF the louver. • Select a desired setting from "ON" and "OFF." Use to set the amount of ventilation.
  • Page 11 Setting and display items Setting details Service Function setting Use to make settings for indoor unit's functions. (City Multi) Input Select "Input maintenance Info." from the Service menu to bring up the Maintenance maintenance information screen. The following settings can be made from the Maintenance Information screen. •...
  • Page 12 2-3. WIRED REMOTE CONTROLLER <PAR-21MAA> “Sensor” indication Display Section Displays when the remote controller sensor is used. Day-of-Week For the purpose of explanation, Shows the current day of the week. all parts of the display are shown. During actual operation, only Time/Timer Display the relevant items will be lit.
  • Page 13 2-4. Wireless remote controller CHECK TEST RUN display display CHECK and TEST RUN display indicate that the unit is being checked or test-run. Lights up while the signal is transmitted to MODEL SELECT display the indoor unit when the button is pressed. display Blinks when model is selected.

  • Page 14: Specifications

    SPECIFICATIONS 3-1. SPECIFICATIONS Model PLFY-P15VCM-E3 PLFY-P20VCM-E3 PLFY-P25VCM-E3 PLFY-P32VCM-E3 PLFY-P40VCM-E3 Power source Single phase 220-230-240V 50Hz Cooling capacity (Nominal) kcal/ h 1,450 1,900 2,400 3,100 3,900 BTU/ h 5,800 7,500 9,600 12,300 15,400 1,500 2,000 2,500 3,150 4,000 kcal/ h Power input 0.04 0.04 0.05...
  • Page 15 3-2. ELECTRICAL PARTS SPECIFICATIONS Service ref. Symbol PLFY-P15VCM-E3.TH PLFY-P20VCM-E3.TH PLFY-P25VCM-E3.TH PLFY-P32VCM-E3.TH PLFY-P40VCM-E3.TH Parts name Thermistor (Room temperature TH21 Resistance 0:/15k", 10:/9.6k", 20:/6.3k", 25:/5.4k", 30:/4.3k", 40:/3.0k" detection) Thermistor (Pipe temperature TH22 Resistance 0:/15k", 10:/9.6k", 20:/6.3k", 25:/5.4k", 30:/4.3k", 40:/3.0k" detection/ Liquid) Thermistor (Pipe temperature TH23 Resistance 0:/15k", 10:/9.6k", 20:/6.3k", 25:/5.4k", 30:/4.3k", 40:/3.0k"...

  • Page 16: 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 [100 [73.4 3-[2.8 hole...
  • Page 17 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 18: Outlines And Dimensions

    OUTLINES AND DIMENSIONS PLFY-P15VCM-E3.TH PLFY-P20VCM-E3.TH PLFY-P25VCM-E3.TH PLFY-P32VCM-E3.TH PLFY-P40VCM-E3.TH Unit: mm Fresh air intake Detail drawing of fresh air intake Detail drawing of fresh air intake Detail drawing of fresh air intake Suspension bolt pitch [100 [73.4 3-[2.8 Cut out hole Cut out hole Cut out hole Burring hole...

  • Page 19: Wiring Diagram

    WIRING DIAGRAM PLFY-P15VCM-E3.TH PLFY-P20VCM-E3.TH PLFY-P25VCM-E3.TH PLFY-P32VCM-E3.TH PLFY-P40VCM-E3.TH [LEGEND] SYMBOL NAME SYMBOL NAME <fig.*1> INDOOR CONTROLLER BOARD VANE MOTOR REMOTE SWITCH TERMINAL CN32 POWER SUPPLY MODELS JEMA HA TERMINAL-A BLOCK TRANSMISSION CN51 CENTRALLY CONTROL TB15 MA-REMOTE CONTROLLER 123456 THERMISTOR CN52 REMOTE INDICATION TH21 ROOM TEMP DETECTION IT TERMINAL...

  • Page 20: Refrigerant System Diagram

    REFRIGERANT SYSTEM DIAGRAM PLFY-P15VCM-E3.TH PLFY-P20VCM-E3.TH PLFY-P25VCM-E3.TH PLFY-P32VCM-E3.TH PLFY-P40VCM-E3.TH 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 temparature detection) TH21 Unit: mm (inch) Gas pipe [12.7(1/2)

  • Page 21: 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 22 8-2. HOW TO CHECK THE PARTS PLFY-P15VCM-E3.TH PLFY-P20VCM-E3.TH PLFY-P25VCM-E3.TH PLFY-P32VCM-E3.TH PLFY-P40VCM-E3.TH Parts name Check points Thermistor (TH21) Disconnect the connector then measure the resistance with a tester. (Room temperature (At the ambient temperature 10 to 30:) detection) Thermistor (TH22) Normal Abnormal (Pipe temperature Refer to Thermistor characteristic graph.
  • Page 23 <Thermistor Characteristic Graph> Thermistor (TH21) < Thermistor for lower temperature > Thermistor 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 15 kΩ...
  • Page 24 <Output pulse signal and the valve operation> Output Output (Phase) Closing a valve : 1 → 2 → 3 → 4 → 1 Opening a valve : 4 → 3 → 2 → 1 → 4 The output pulse shifts in above order. •...
  • Page 25 <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 26 8-3. FUNCTION OF DIP SWITCH Operation by switch Effective Switch Pole Function Remarks timing Thermistor <Room temperature Built-in remote controller Indoor unit Indoor controller board detection> position Filter clogging detection Provided Not provided <Initial setting> Filter cleaning 2,500h 100h Fresh air intake Effective Not effective 1 2 3 4 5 6 7 8 9 10...
  • Page 27 Effective Pole Operation by switch Remarks timing SW11 Indoor controller board 1s digit SW12 SW11 address <Initial setting> Address setting should be done when M-NET setting SW12 SW11 remote controller is being used. SW12 10ths digit address Before setting power supply Indoor controller board SW14...
  • Page 28 8-4. TEST POINT DIAGRAM Indoor controller board PLFY-P15VCM-E3.TH PLFY-P20VCM-E3.TH PLFY-P25VCM-E3.TH PLFY-P32VCM-E3.TH PLFY-P40VCM-E3.TH CN2M Connect to the terminal block (TB5) Dew prevention (M-NET transmission connecting wire) Drain pump output (DP) heater (H2) 24-30V DC (non-polar) Between 1 to 3 220-240V AC (220~240V AC) CN3A Connect to the terminal block...

  • Page 29: Disassembly Procedure

    DISASSEMBLY PROCEDURE PLFY-P15VCM-E3.TH PLFY-P20VCM-E3.TH PLFY-P25VCM-E3.TH PLFY-P32VCM-E3.TH PLFY-P40VCM-E3.TH Be careful when removing heavy parts. OPERATING PROCEDURE PHOTOS & ILLUSTRATIONS 1. Removing the air intake grille Figure 1 (1) Slide the knob of air intake grille to the direction of the Air intake grille arrow 1 to open the air intake grille.
  • Page 30 OPERATING PROCEDURE PHOTOS & ILLUSTRATIONS 5. Removing the room temperature detection (TH21) Photo 4 (1) Remove the panel. (Refer to procedure 3) Connectors (2) Pull out the room temperature detection from the drain pan. (3) Remove the 2 screws fixed to the control box cover, and Drain plug Control box remove the control box cover.
  • Page 31 OPERATING PROCEDURE PHOTOS & ILLUSTRATIONS 9. Removing the drain pump (DP) and drain sensor (DS) Photo 7 Cover Screw (1) Remove the panel. (Refer to procedure 3 ) (2) Remove the drain pan. (Refer to procedure 6) (3) Remove the 2 screws fixed to the control box cover, and Control remove the control box cover.
  • Page 32 HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU TOKYO 100-8310, JAPAN New publication, effective Jun. 2014 cCopyright 2014 MITSUBISHI ELECTRIC CORPORATION Specifications are subject to change without notice. Distributed in Jun. 2014 No. OCH569 Made in Japan...

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