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Mitsubishi Electric PLFY Series Technical & Service Manual

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Air-Conditioners For Building Application
TECHNICAL & SERVICE MANUAL
Series PLFY
<Indoor unit>
PLFY-P20VLMD-B,PLFY-P40VLMD-B
Models
PLFY-P25VLMD-B,PLFY-P50VLMD-B
PLFY-P32VLMD-B,PLFY-P63VLMD-B
INDOOR UNIT
Ceiling Cassettes
CONTENTS
SAFETY PRECAUTIONS ááááááááááááááááááááááááá1
1. FEATURESáááááááááááááááááááááááááááááááááááááááááááá3
2. PART NAMES AND FUNCTIONS áááááááá4
3. SPECIFICATION ááááááááááááááááááááááááááááááááááá6
4. OUTLINES AND DIMENSIONSáááááááááááá8
5. WIRING DIAGRAM ááááááááááááááááááááááááááááá10
6. REFRIGERANT SYSTEM DIAGRAMáááá11
7. TROUBLE SHOOTINGáááááááááááááááááááááááá12
8. DISASSEMBLY PROCEDURE ááááááááááá17
For use with the R407C
2003

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Summary of Contents for Mitsubishi Electric PLFY Series

  • Page 1 2003 Air-Conditioners For Building Application TECHNICAL & SERVICE MANUAL Ceiling Cassettes Series PLFY <Indoor unit> PLFY-P20VLMD-B,PLFY-P40VLMD-B Models PLFY-P25VLMD-B,PLFY-P50VLMD-B PLFY-P32VLMD-B,PLFY-P63VLMD-B CONTENTS SAFETY PRECAUTIONS ááááááááááááááááááááááááá1 1. FEATURESáááááááááááááááááááááááááááááááááááááááááááá3 2. PART NAMES AND FUNCTIONS áááááááá4 3. SPECIFICATION ááááááááááááááááááááááááááááááááááá6 4. OUTLINES AND DIMENSIONSáááááááááááá8 5. WIRING DIAGRAM ááááááááááááááááááááááááááááá10 6.
  • Page 2 Ask the dealer or an authorized technician to install the air con- is shorted and operated forcibly, or parts other than those specified ditioner. by Mitsubishi Electric are used, fire or explosion may result. - Improper installation by the user may result in water leakage, elec- tric shock, or fire.
  • Page 3 Precautions for devices that use R407C refrigerant Caution: • Do not use the existing refrigerant piping. - The old refrigerant and refrigerator oil in the existing piping con- tains a large amount of chlorine which may cause the refrigerator oil of the new unit to deteriorate. •...
  • Page 4 FEATURES Ceiling Cassettes Series PLFY Indoor unit Cooling capacity/Heating capacity Models 2.2/ 2.5 PLFY-P20VLMD-B 2.8/ 3.2 PLFY-P25VLMD-B 3.6/ 4.0 PLFY-P32VLMD-B 4.5/ 5.0 PLFY-P40VLMD-B 5.6/ 6.3 PLFY-P50VLMD-B 7.1/ 8.0 PLFY-P63VLMD-B...
  • Page 5 PART NAMES AND FUNCTIONS G Indoor (Main) Unit Autovane Disperses the airflow up and down and adjusts the angle of the airflow. Long-life filter Removes the sucked-in dust and dirt. Since the long-life filter is used as an air filter, it should be cleaned at the begin- ning of air-cooling and heating seasons.
  • Page 6 G Display A U T 1Hr. CENTRALLY CONTROLLED ON OFF ˚C CLOCK CHECK FILTER CHECK MODE ˚C TEST RUN STAND BY ERROR CODE FUNCTION NOT AVAILABLE DEFROST TEMP. ON/OFF I K L J Current time/Timer Centralized control Timer ON Abnormality occurs Operation mode: COOL, DRY, AUTO, FAN,...
  • Page 7 SPECIFICATION 3-1. Specification Model Item PLFY-P25VLMD-B PLFY-P32VLMD-B PLFY-P20VLMD-B Power source ~V • Hz ~ 220-240V 50Hz / ~ 220-230V 60Hz Voltage • Frequency Note:1 Cooling capacity Note:1 Heating capacity 0.072 / 0.075 0.072 / 0.075 0.072 / 0.075 Cooling Power consumption 0.065 / 0.069 0.065 / 0.069 0.065 / 0.069...
  • Page 8 3-2. Electrical parts specifications Model PLFY-P20 PLFY-P25 PLFY-P32 PLFY-P40 PLFY-P50 PLFY-P63 Symbol Parts VLMD-B VLMD-B VLMD-B VLMD-B VLMD-B VLMD-B name Tranrsformer (Primary) 220-240V 50Hz, 220-230V 60Hz (Secondry) 23.2V 1.1A Room temperature TH21 Resistance 0¡C/15k½, 10¡C/9.6k½, 20¡C/6.3k½,25¡C/5.4k½, 30¡C/4.3k½, 40¡C/3.0k½ thermistor Liquid pipe TH22 Resistance 0¡C/15k½, 10¡C/9.6k½, 20¡C/6.3k½,25¡C/5.4k½, 30¡C/4.3k½, 40¡C/3.0k½...
  • Page 9 OUTLINES AND DIMENSIONS Indoor Unit PLFY-P20·25·32·40·50·63VLMD-B Unit : mm...
  • Page 10 Indoor Unit PLFY-P20·25·32·40·50·63VLMD-B with OA duct flange Unit : mm...
  • Page 11 WIRING DIAGRAM...
  • Page 12 REFRIGERANT SYSTEM DIAGRAM Gas pipe thermistor TH23 Gas pipe Liquid pipe thermistor TH22 Flare connection Heat exchanger Linear expansion valve Strainer (#100mesh) Strainer (#100mesh) Room temparature thermistor TH21 Capacity PLFY-P20,25,32,40VLMD-B PLFY-P50,63VLMD-B Item ¿ ¿ Gas pipe 12.7<1/2F> 15.88<5/8F> ¿ ¿ Liquid pipe 6.35<1/4F>...
  • Page 13 TROUBLE SHOOTING 7-1. Simple check of main components Parts name Check points Room temperature Disconnect the connector, then measure the resistance using a tester. thermistor (TH21) (Surrounding temperature 10¡C to 30¡C) Liquid pipe thermistor Normal Abnormal (TH22) Open or short 4.3k½~9.6k½...
  • Page 14 <Table of thermistor characteristics> < Thermistor for lower temperature > Thermistor (piping temperature detection, room temperature detection) Table of thermistor resistance Thermistor Ro = 15k½±3% B constant = 3480k½±2% Thermistor R =15k½ ± 3% Fixed number of B=3480k½ ± 2% Rt=15exp { 3480( 273+t 0ûC...
  • Page 15 <Output pulse signal and the valve operation> Output Output : 1 ¡ 2 ¡ 3 ¡ 4 ¡ 1 (Phase) Closing a valve Opening a valve : 4 ¡ 3 ¡ 2 ¡ 1 ¡ 4 ø1 The output pulse shifts in above order. ø2 * 1.
  • Page 16 7-2. FUNCTION OF DIP-SWICH Operation by switch Switch Pole Remarks Function Thermistor<Intake temperature Indoor unit Built-in remote controller <At delivery> detection>position Filter crogging detection Provided Not provided 1 2 3 4 5 6 7 8 9 10 Filter life 2,500hr 100hr Air intake Effective...
  • Page 17 Switch Pole Operation by switch Remarks SW11 1st digit Address can be set while the address unit is stopped. setting <At delivery> SW12 SW11 Address setting should be done when network SW12 SW12 SW11 remote controller (PAR-F25MA) is being used. 2nd degit address setting...
  • Page 18 DISASSEMBLY PROCEDURE 8-1.SERVICE PANEL and FILTER OPERATING PROCEDURE PHOTOS&ILLUSTRATIONS (fig.1-1) 1. Removing the service panel A (fig.1-1) (1) Slide the service panel A in the direction of the arrow 1 while lifting it.( depending on the local installation,the slidedirection is reverse ) (2) After sliding, if it is opened in direction 2 , the service panel A drops down as shown in fig.1-2.
  • Page 19 8-2.CONTROL BOX OPERATING PROCEDURE PHOTOS&ILLUSTRATIONS 1. Remove the service panel and filter with proce- (fig.2-1) dure 8-1 on the previons page. Control box cover 2. Removing the connector cover (fig.2-1). • Remove the fixing screws (one) of the connector (Photo.2-1) cover (A),and remove the cover.
  • Page 20 8-3.Turbo fan and fan motor PHOTOS&ILLUSTRATIONS OPERATING PROCEDURE 1. Remove the service panel and filter with proce- (fig.3-1) dure 8-1. 2. Remove the two screws fixing the bell-mouth A, and remove the bell-mouth A. (Fig. 3-1) Bell-mouth 3. Remove the turbo fan mounting screw (one M8 nut), and pull the turbo fan off the fan motor shaft.
  • Page 21 8-4.Thermistor <fluid piping temperature detection, gas piping temperature detection> OPERATING PROCEDURE PHOTOS&ILLUSTRATIONS (fig.4-1) 1. Remove the service panel and filter with the pro- cedure explained in section 8-1. 2. Remove the decorative panel frame. (1) Loosen the four stepped screws fixing the panel, and suspend the panel frame.
  • Page 22 8-5.DRAIN PUMP and DRAIN SENSOR OPERATING PROCEDURE PHOTOS&ILLUSTRATIONS 1. Remove the service panel and filter with proce- (Photo.5-1) dure 8-1. 2. Remove the decorative panel frame with the pro- cedures explained in section 8-4. 3. Remove the bell-mouth with the procedures explained in section 8-3.
  • Page 23 8-6.LEV and HEAT EXCHANGER OPERATING PROCEDURE PHOTOS&ILLUSTRATIONS 1. Remove the service panel and filter with proce- (Photo.6-1) dure 8-1. 2. Remove the decorative panel frame with the pro- cedures explained in section 8-4. 3. Remove the bell-mouth with the procedures explained in section 8-3.
  • Page 24 8-7.Vane motor OPERATING PROCEDURE PHOTOS&ILLUSTRATIONS 1. Remove the metal cover. (Three screws) (Photo.7-1) (Photograph 7-1) 2. Remove the vane motor cover. The vane motor cover can be removed by pushing it up with fingers. 3. Remove the two motor mounting screws. (Photograph 7-2) Fixing screw Vane motor cover...
  • Page 26 HEAD OFFICE: MITSUBISHI DENKI BLDG., 2-2-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN Issued in Mar. 2003 MEE02K143 New publication, effective Mar. 2003 Printed in Japan Specifications subject to change without notice...

This manual is also suitable for:

Plfy-p20vlmd-bPlfy-p40vlmd-bPlfy-p25vlmd-bPlfy-p50vlmd-bPlfy-p32vlmd-bPlfy-p63vlmd-b