Table of Contents
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SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
TECHNICAL & SERVICE MANUAL
Indoor unit
[Model names]
PLFY-P20VCM-E2
PLFY-P25VCM-E2
PLFY-P32VCM-E2
PLFY-P40VCM-E2
INDOOR UNIT
Model name
indication
[Service Ref.]
PLFY-P20VCM-E2.TH
PLFY-P25VCM-E2.TH
PLFY-P32VCM-E2.TH
PLFY-P40VCM-E2.TH
R410A
R407C
Note :
• This manual describes
only service data of the
indoor units.
• RoHS compliant products
have <G> mark on spec
name plate.
CONTENTS
1. SAFETY PRECAUTION .......................... 2
2. PART NAMES AND FUNCTIONS .......... 6
3. SPECIFICATIONS ................................... 9
4. 4-WAY AIR FLOW SYSTEM ................. 11
5. OUTLINES AND DIMENSIONS ............ 13
6. WIRING DIAGRAM ............................... 14
7. REFRIGERANT SYSTEM DIAGRAM ...... 15
8. TROUBLESHOOTING .......................... 16
9. DISASSEMBLY PROCEDURE ............. 23
PARTS CATALOG (OCB463)
May 2009
No.OCH463
R22
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Table of Contents
Related Manuals for Mitsubishi Electric PLFY-P20VCM-E2.TH
Summary of Contents for Mitsubishi Electric PLFY-P20VCM-E2.TH
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Page 1: Table Of Contents
TECHNICAL & SERVICE MANUAL R410A R407C Indoor unit [Model names] [Service Ref.] Note : • This manual describes PLFY-P20VCM-E2 PLFY-P20VCM-E2.TH only service data of the indoor units. • RoHS compliant products PLFY-P25VCM-E2 PLFY-P25VCM-E2.TH have <G> mark on spec name plate. PLFY-P32VCM-E2 PLFY-P32VCM-E2.TH... -
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 which is 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 all the 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 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.
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Page 6: Part Names And Functions
PART NAMES AND FUNCTIONS Indoor Unit Filter Remove dust and pollutants from inhaled 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. Air Intake Inhales air from room. - Page 7 Wired remote controller Display Section Day-of-Week “Sensor” indication For purposes of this explanation, Shows the current day of the week. Displayed when the remote controller all parts of the display are shown sensor is used. as lit. During actual operation, only the relevant items will be lit.
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Page 8: Wireless Remote Controller
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 the indoor unit when the button is pressed. MODEL SELECT display display Blinks when model is selected. -
Page 9: Specifications
SPECIFICATIONS 3-1. SPECIFICATIONS Model PLFY-P20VCM-E2 PLFY-P25VCM-E2 PLFY-P32VCM-E2 PLFY-P40VCM-E2 Power source Single phase 220-230-240V 50Hz Cooling capacity 1,900 (Nominal) kcal / h 2,400 3,100 3,900 7,500 9,600 12,300 15,400 Btu / h kcal / h 2,000 2,500 3,150 4,000 Power input 0.05 0.05 0.06... - Page 10 3-2. ELECTRICAL PARTS SPECIFICATIONS Model Symbol PLFY-P20VCM-E2.TH PLFY-P25VCM-E2.TH PLFY-P32VCM-E2.TH PLFY-P40VCM-E2.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...
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Page 11: 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-E2.TH PLFY-P25VCM-E2.TH PLFY-P32VCM-E2.TH PLFY-P40VCM-E2.TH Taking air into the unit How to read curves Q … Designed amount of fresh air intake... - 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 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.
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Page 13: Outlines And Dimensions
OUTLINES AND DIMENSIONS PLFY-P20VCM-E2.TH PLFY-P25VCM-E2.TH PLFY-P32VCM-E2.TH PLFY-P40VCM-E2.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 73.4 3- 2.8 Cut out hole Cut out hole... -
Page 14: Wiring Diagram
WIRING DIAGRAM PLFY-P20VCM-E2.TH PLFY-P25VCM-E2.TH PLFY-P32VCM-E2.TH PLFY-P40VCM-E2.TH... -
Page 15: Refrigerant System Diagram
REFRIGERANT SYSTEM DIAGRAM PLFY-P20VCM-E2.TH PLFY-P25VCM-E2.TH PLFY-P32VCM-E2.TH PLFY-P40VCM-E2.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... -
Page 16: Troubleshooting
TROUBLESHOOTING 8-1. HOW TO CHECK THE PARTS PLFY-P20VCM-E2.TH PLFY-P25VCM-E2.TH PLFY-P32VCM-E2.TH PLFY-P40VCM-E2.TH Parts name Check points Thermistor (TH21) Disconnect the connector then measure the resistance with a tester. (Room temperature (At the ambient temperature 10 ~30 ) detection) Thermistor (TH22) Normal... -
Page 17: Linear Expansion Valve
<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=3480 ± 2% Rt=15exp { 3480( 273+t 15k'... - Page 18 <Output pulse signal and the valve operation> Output Output Closing a valve : 1 → 2 → 3 → 4 → 1 (Phase) Opening a valve : 4 → 3 → 2 → 1 → 4 The output pulse shifts in above order. •...
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Page 19: Function Of Dip Switch
8-2. 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 <Initial setting> Filter cleaning 2,500h 100h Fresh air intake Effective Not effective 1 2 3 4 5 6 7 8 9 10... - Page 20 Effective Pole Operation by switch Remarks timing SW11 Indoor controller board 1s digit SW12 SW11 address <Initial setting> setting Address setting should be done when M-NET SW12 SW11 remote controller is being used. SW12 10ths digit address Before setting power supply Indoor controller board SW14...
- Page 21 8-3. TEST POINT DIAGRAM 8-3-1. Indoor controller board PLFY-P20VCM-E2.TH PLFY-P25VCM-E2.TH PLFY-P32VCM-E2.TH PLFY-P40VCM-E2.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 to 3 8.7-13V DC (Pin1 (+))
- Page 22 8-3-2. Indoor power board PLFY-P20VCM-E2.TH PLFY-P25VCM-E2.TH PLFY-P32VCM-E2.TH PLFY-P40VCM-E2.TH CN2S Connect to the indoor controller board (CN2D) Between 1 to 3 12.5-13.7V DC (Pin1 (+)) CNSK Connect to the indoor controller board (CNDK) Between 1 to 3 220-240V AC...
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Page 23: Disassembly Procedure
DISASSEMBLY PROCEDURE PLFY-P20VCM-E2.TH PLFY-P25VCM-E2.TH Be careful when removing heavy parts. PLFY-P32VCM-E2.TH PLFY-P40VCM-E2.TH 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. - Page 24 OPERATING PROCEDURE PHOTOS&ILLUSTRATIONS 5. Removing 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. (3) Remove the 2 screws fixed to the control box cover, and Drain plug Control box remove the control box cover.
- Page 25 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 28 HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU TOKYO 100-8310, JAPAN New publication, effective May 2009 cCopyright 2009 MITSUBISHI ELECTRIC ENGINEERING CO., LTD. Specifications subject to change without notice Distributed in May 2009 No. OCH463 PDF 6 Made in Japan...