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Mitsubishi Electric PLFY-P20VCM-E Technical & Service Manual

Split type, heat pump air conditioner
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SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
TECHNICAL & SERVICE MANUAL
Series PLFY
Indoor unit
[Model names]
PLFY-P20VCM-E
PLFY-P25VCM-E
PLFY-P32VCM-E
PLFY-P40VCM-E
INDOOR UNIT
Model name
indication
Ceiling Cassettes
[Service Ref.]
PLFY-P20VCM-E.TH
PLFY-P25VCM-E.TH
PLFY-P32VCM-E.TH
PLFY-P40VCM-E.TH
R410A
R407C
CONTENTS
1. SAFETY PRECAUTION··························2
2. PART NAMES AND FUNCTIONS ··········6
3. SPECIFICATIONS···································8
4. 4-WAY AIR FLOW SYSTEM·················10
5. OUTLINES AND DIMENSIONS············12
6. WIRING DIAGRAM·······························13
8. DISASSEMBLY PROCEDURE·············15
9. TROUBLE SHOOTING·························18
10 . PARTS LIST··········································25
No. OC314
R22

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  • Page 1: Table Of Contents

    SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS No. OC314 TECHNICAL & SERVICE MANUAL Ceiling Cassettes Series PLFY R410A R407C Indoor unit [Model names] [Service Ref.] PLFY-P20VCM-E.TH PLFY-P20VCM-E PLFY-P25VCM-E.TH PLFY-P25VCM-E PLFY-P32VCM-E.TH PLFY-P32VCM-E PLFY-P40VCM-E.TH PLFY-P40VCM-E CONTENTS 1. SAFETY PRECAUTION··························2 2. PART NAMES AND FUNCTIONS ··········6 3.

  • Page 2: Safety Precaution

    SAFETY PRECAUTION CAUTIONS RELATED TO NEW REFRIGERANT Cautions for units utilizing refrigerant R407C Do not use the existing refrigerant piping. Use liquid refrigerant to charge the system. The old refrigerant and lubricant in the existing piping If gas refrigerant is used to seal the system, the composition contains a large amount of chlorine which may cause the of the refrigerant in the cylinder will change and performance lubricant deterioration of the new unit.
  • Page 3 [2] Refrigerant recharging (1) Refrigerant recharging process 1Direct charging from the cylinder. ·R407C cylinder are available on the market has a syphon pipe. ·Leave the syphon pipe cylinder standing and recharge it. (By liquid refrigerant) Unit Gravimeter (2) Recharge in refrigerant leakage case ·After recovering the all refrigerant in the unit, proceed to working.
  • Page 4 Cautions for units utilizing refrigerant R410A Use a vacuum pump with a reverse flow check Do not use the existing refrigerant piping. valve. The old refrigerant and lubricant in the existing piping Vacuum pump oil may flow back into refrigerant cycle and contains a large amount of chlorine which may cause the that can cause deterioration of refrigerant oil etc.
  • Page 5 [1] Cautions for service (1) Perform service after collecting 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: Part Names And Functions

    PART NAMES AND FUNCTIONS Indoor Unit Filter Remove dust and pollutants from inhaled air Horizontal Air Outlet Sets airflow horizontal automatically during cooling or dehumidifying. Grille Auto Air Swing Vane Disperses airflow up and down and adjusts the angle of airflow direction. Air Intake Inhales air from room.

  • Page 7: Operation Lamp

    Display In this display example on the bot- CENTRALLY CLOCK display tom left, a condition where all dis- CONTROLLED display play lamps light is shown for expla- The current time , start time and stop time can be displayed in ten second nation purposes although this differs This indicates when the unit is con- intervals by pressing the time switch...

  • Page 8: 3-1. Specifications

    SPECIFICATION SPECIFICATIONS 3-1. Specifications PLFY-P32VCM-E.TH Item PLFY-P25VCM-E.TH PLFY-P40VCM-E.TH PLFY-P20VCM-E.TH · Single phase 220-230-240V 50Hz Power Cooling capacity Heating capacity 0.05 0.06 Cooling Input 0.05 0.06 Heating 0.23 0.28 Cooling Current 0.23 0.28 Heating Exterior Unit : Galvanized sheets with gray heat insulation Grills : ABS resin Munsell<0.70Y 8.59/0.97>...
  • Page 9 3-2. Electrical parts specifications Model Symbol PLFY-P20VCM-E.TH PLFY-P25VCM-E.TH PLFY-P32VCM-E.TH PLFY-P40VCM-E.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 10: Way Air Flow System

    Burring hole Ceiling surface Drain pipe Electrical Box Refrigerant pipe 4-2. Fresh air intake amount & static pressure characteristics PLFY-P20VCM-E.TH PLFY-P25VCM-E.TH PLFY-P32VCM-E.TH PLFY-P40VCM-E.TH Taking air into the unit How to read curves Q … Planned amount of fresh air intake...
  • Page 11 4-4. Fixing of horizontal vane Horizontal vane of each air outlet can be fixed according to the environment, which is installed. Setting procedure 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 12: Outlines And Dimensions

    OUTLINES AND DIMENSIONS PLFY-P20VCM-E.TH Unit : mm PLFY-P25VCM-E.TH PLFY-P32VCM-E.TH PLFY-P40VCM-E.TH 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...

  • Page 13: Wiring Diagram

    WIRING DIAGRAM PLFY-P20VCM-E.TH PLFY-P25VCM-E.TH PLFY-P32VCM-E.TH PLFY-P40VCM-E.TH [LEGEND] SYMBOL NAME SYMBOL NAME INDOOR CONTROLLER BOARD CAPACITOR (FAN MOTOR) CN32 CONNECTOR REMOTE SWITCH DRAIN PUMP CN41 HA TERMINAL-A DRAIN SENSOR CN51 CENTRALLY CONTROL DEW PREVENTION HEATER CN52 REMOTE INDICATION LINEAR EXPANSION VALVE FUSE FUSE (6.3A/250V)

  • Page 14: Refrigerant System Diagram

    REFRIGERANT SYSTEM DIAGRAM PLFY-P20VCM-E.TH PLFY-P25VCM-E.TH PLFY-P32VCM-E.TH PLFY-P40VCM-E.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 Gas pipe [12.7(1/2'')

  • Page 15: Disassembly Procedure

    DISASSEMBLY PROCEDURE PLFY-P20·P25·P32·P40VCM-E.TH Be careful on 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 arrow 1 to open the air intake grille. Air intake grille (2) Remove the hook for secure belt on air inlet grille from the panel.
  • Page 16 OPERATING PROCEDURE PHOTOS&ILLUSTRATIONS 5. Remove the room temperature detection (TH21) Photo 4 (1) Remove the panel. (Refer to 3) Connectors (2) Pull out the room temperature detection from the drain pan. Drain plug Control box (3) Remove the 2 screws fixed to the control box cover, and remove the control box cover.
  • Page 17 OPERATING PROCEDURE PHOTOS&ILLUSTRATIONS 9. Removing the drain pump (DP) and drain sensor (DS) Photo 7 Cover Screw (1) Remove the panel. (Refer to 3 ) (2) Remove the drain pan. (Refer to 6) (3) Remove the 2 screws fixed to the control box cover, and Control remove the control box cover.

  • Page 18: Trouble Shooting

    TROUBLE SHOOTING 9-1. How to check the parts PLFY-P20VCM-E.TH PLFY-P25VCM-E.TH PLFY-P32VCM-E.TH PLFY-P40VCM-E.TH Parts name Check points Thermistor (TH21) Disconnect the connector then measure the resistance using a tester. (Room temperature (Surrounding temperature 10:~30:) detection) Thermistor (TH22) Normal Abnormal (Pipe temperature Refer to the next page for the details.
  • Page 19 <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 =15k' ± 3% Fixed number of B=3480K ± 2% Rt=15exp { 3480( 273+t 15k'...
  • Page 20 <Output pulse signal and the valve operation> Output Output (Phase) Closing a valve : 1 Opening a valve : 4 The output pulse shifts in above order. 1. When linear expansion valve operation stops, all output phase become OFF. 2. At phase interruption or when phase does not shift in order, motor does not rotate smoothly and motor will locks and vibrates.
  • Page 21 9-2. 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 <At delivery> Filter cleaning 2,500hr 100hr Fresh air intake Effective Not effective 1 2 3 4 5 6 7 8 9 10...
  • Page 22 Effective Pole Operation by switch Remarks timing SW11 Indoor controller board 1st digit Address can be set while the address SW12 SW11 unit is stopped. setting Address setting should be done when M-NET <At delivery> Remote controller is being used. SW12 SW12 SW11...
  • Page 23 9-3. TEST POINT DIAGRAM 9-3-1. Indoor controller board PLFY-P20VCM-E.TH PLFY-P25VCM-E.TH PLFY-P32VCM-E.TH PLFY-P40VCM-E.TH CN2M CN3A LED2 Connect to the terminal block (TB5) Connect to the terminal block (TB15) Power supply for (M-NET transmission connecting wire) (MA-Remote controller connecting wire) MA-Remote controller 24-30V DC (non-polar) Between 1 1 to 3 3 8.7-13V DC (Pin1 1 (+))
  • Page 24 9-3-2. Indoor power board PLFY-P20VCM-E.TH PLFY-P25VCM-E.TH PLFY-P32VCM-E.TH PLFY-P40VCM-E.TH CN2S Connect to the indoor power board (CN2D) Between 1 1 to 3 3 12.6-13.7V DC (Pin1 1 (+)) CNSK Connect to the indoor controller board (CNDK) Between 1 1 to 3 3 220-240V AC...

  • Page 25: Parts List

    PARTS LIST PANEL PARTS GEAR(M) SLP-2AA GEAR(V) VANE BUSH VANE MOTOR CENTRALLY CONTROLLED 1Hr. ON OFF ˚C CLOCK CHECK FILTER CHECK MODE ˚C TEST RUN STAND BY ERROR CODE NOT AVAILABLE FUNCTION DEFROST TEMP. ON/OFF FILTER CHECK TEST TIMER SET PAR-20MAA Price Q'ty/set...
  • Page 26 FUNCTIONAL PARTS PLFY-P20VCM-E.TH PLFY-P25VCM-E.TH PLFY-P32VCM-E.TH PLFY-P40VCM-E.TH DRAIN SENSOR SENSOR HOLDER / TH23 PIPE TEMPERA- TURE DETECTION / GAS PIPE TEMPERA- TURE DETECTION / LIQUID SPL WASHER ROOM TEMPERA- TURE DETECTION...
  • Page 27 Q'ty/set Price PLFY Wiring Recom- Remarks Specification Parts No. Parts name Diagram mended (Drawing No.) Unit Amount Symbol Q'ty VCM-E.TH E07 104 290 BASE E07 104 124 DRUM-1 E07 104 808 LEG-1 E07 105 124 DRUM-2 E07 154 620 INDOOR HEAT EXCHANGER E07 155 620 INDOOR HEAT EXCHANGER E07 154 640...
  • Page 28 E07 154 440 INDOOR POWER BOARD HEAD OFFICE : MITSUBISHI DENKI BLDG., 2-2-3, MARUNOUCHI, CHIYODA-KU TOKYO 100-8310, JAPAN cCopyright 2004 MITSUBISHI ELECTRIC ENGINEERING CO., LTD. New publication, effective Aug. 2004 Specifications subject to change without notice Distributed in Aug. 2004. No. OC314 PDF 8...

This manual is also suitable for:

Plfy-p25vcm-ePlfy-p40vcm-ePlfy-p32vcm-e

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