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Mitsubishi Electric City Multi PCFY-P15NGMU-E Technical & Service Manual

Split-type, heat pump air conditioners
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SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
TECHNICAL & SERVICE MANUAL
PCFY-P15NGMU-E
[Models]
PCFY-P24NGMU-E
PCFY-P30NGMU-E
PCFY-P36NGMU-E
REVISED EDITION-A
R410A
R22
Revision:
• RoHS PARTS LIST is added.
• Some descriptions have been
modified.
• Please void OC343.
NOTE:
• This manual describes only
service data of the indoor
units.
• RoHS compliant products
have <G> mark on the spec
name plate.
• For servicing of RoHS
compliant products, refer to
the RoHS PARTS LIST.
CONTENTS
1. FEATURES ··········································2
3. SPECIFICATIONS ·······························6
4. OUTLINES AND DIMENSIONS···········9
5. WIRING DIAGRAM····························13
8. TROUBLE SHOOTING······················22
9. DISASSEMBLY PROCEDURE··········29
10. PARTS LIST······································33
11. RoHS PARTS LIST ··························40
12. OPTIONAL PARTS ··························47
August 2006
No. OC343

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  • Page 1: Table Of Contents

    SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS August 2006 No. OC343 REVISED EDITION-A TECHNICAL & SERVICE MANUAL R410A PCFY-P15NGMU-E [Models] Revision: • RoHS PARTS LIST is added. PCFY-P24NGMU-E • Some descriptions have been modified. PCFY-P30NGMU-E • Please void OC343. PCFY-P36NGMU-E NOTE: • This manual describes only service data of the indoor units.

  • Page 2: Features

    FEATURES Indoor unit Models Cooling capacity / Heating capacity PCFY-P15NGMU-E 15,000 / 17,000 Btu/h PCFY-P24NGMU-E 24,000 / 27,000 Btu/h PCFY-P30NGMU-E 30,000 / 34,000 Btu/h PCFY-P36NGMU-E 36,000 / 40,000 Btu/h Protruding portion B 1. EASY TO CLEAN ; FLOCKLESS VANE Unifies the air speed with the vane With our original air current control mechanism, a flockless vane is newly adapted.
  • Page 3 4. IMPROVING EFFICIENCY OF PIPING WORK 2 2 Improved the flexibility by making it possible for 1 1 Removed the knockout work by separating the piping drainage pipe to exit not only from the right side space from the air outlet for efficiency of the piping work. back but also from the left side back.

  • Page 4: Part Names And Functions

    PART NAMES AND FUNCTIONS Indoor Unit Left/right guide vanes Change the direction of airflow from the horizontal blower. Air outlet Long-life filter Removes dust and foreigh matter from air coming in through the grille (Recommended cleaning interval : Approx, every 2,500 operating hours) Air intake Up/down guide vanes Intake grille...
  • Page 5 Display “Sensor” indication Displayed when the remote controller sensor is used. Day-of-Week For purposes of this explanation, Shows the current day of the week. all parts of the display are shown as lit. During actual operation, only Time/Timer Display the relevant items will be lit. “Locked”...

  • Page 6: Specifications

    SPECIFICATIONS 3-1. SPECIFICATIONS Item PCFY-P15NGMU-E PCFY-P24NGMU-E PCFY-P30NGMU-E PCFY-P36NGMU-E · Power Single phase 208/230V 60Hz Cooling capacity Btu/h 15,000 24,000 30,000 36,000 Heating capacity Btu/h 17,000 27,000 34,000 40,000 Cooling 0.08 0.09 0.23 0.27 Input Heating 0.08 0.09 0.23 0.27 Cooling 0.40 0.45 1.12...
  • Page 7 3-2. ELECTRICAL PARTS SPECIFICATIONS Model Symbol PCFY-P15NGMU-E PCFY-P24NGMU-E PCFY-P30NGMU-E PCFY-P36NGMU-E Parts name Room temperature Resistance 30_F/15.8k", 50_F/9.6k", 70_F/6.0k", 80_F/4.8k", 90_F/3.9k", 100_F/3.2k" TH21 thermistor Liquid pipe temperature Resistance 30_F/15.8k", 50_F/9.6k", 70_F/6.0k", 80_F/4.8k", 90_F/3.9k", 100_F/3.2k" TH22 thermistor Gas pipe temperature Resistance 30_F/15.8k", 50_F/9.6k", 70_F/6.0k", 80_F/4.8k", 90_F/3.9k", 100_F/3.2k" TH23 thermistor Fuse...

  • Page 8: Noise Criterion Curves

    3-3. NOISE CRITERION CURVES CEILING UNIT About 1.4m MICROPHONE PCFY-P24NGMU-E PCFY-P15NGMU-E NOTCH SPL(dB) LINE NOTCH SPL(dB) LINE High High Medium1 Medium1 Medium2 Medium2 NC-70 NC-70 NC-60 NC-60 NC-50 NC-50 NC-40 NC-40 NC-30 NC-30 APPROXIMATE THRESHOLD OF HEARING FOR NC-20 NC-20 CONTINUOUS APPROXIMATE THRESHOLD OF HEARING NOISE...

  • Page 9: Outlines And Dimensions

    OUTLINES AND DIMENSIONS Unit: in.(mm) INDOOR UNIT PCFY-P15NGMU-E...
  • Page 10 PCFY-P24NGMU-E Unit : in.(mm)
  • Page 11 Unit: in.(mm) PCFY-P30NGMU-E...
  • Page 12 PCFY-P36NGMU-E Unit : in.(mm)

  • Page 13: Wiring Diagram

    WIRING DIAGRAM PCFY-P15NGMU-E PCFY-P24NGMU-E PCFY-P30NGMU-E PCFY-P36NGMU-E Legend Symbol Name Symbol Name Symbol Name I. B Indoor controller board P. B INDOOR POWER BOARD A. B Circuit board Address CN24 Connector Heater Capacitor (fan motor) Switch Mode selection CN32 Remote switch Linear expansion valve Voltage selection CN51...

  • Page 14: Refrigerant System Diagram

    REFRIGERANT SYSTEM DIAGRAM PCFY-P15NGMU-E PCFY-P24NGMU-E PCFY-P30NGMU-E PCFY-P36NGMU-E Strainer (#100mesh) Gas pipe temperature thermistor TH23 Gas pipe Liquid pipe temperature thermistor TH22 Flare connection Liquid pipe Heat exchanger Linear expansion valve Strainer (# 50mesh) Strainer (#100mesh) Room temperature thermistor TH21 Unit : mm(in.) Model PCFY-P36NGMU-E PCFY-P15NGMU-E...

  • Page 15: Microprocessor Control

    MICROPROCESSOR CONTROL INDOOR UNIT CONTROL 7-1. COOL OPERATION <How to operate> 1 Press POWER ON/OFF button. TIME SUN MON TUE WED THU FRI SAT TIMER AFTER AFTER 2 Press the operation MODE button to display COOL. ERROR CODE FUNCTION ˚F˚C FILTER ˚F˚C 3 Press the TEMP.
  • Page 16 From the preceding page Control modes Remarks Control details 3. Drain pump Drain pump control •Always drain pump ON during the COOL and DRY mode operation (Regardless of the thermo ON/ OFF) •When the operation mode has changed from the COOL or DRY to the others (including Stop), OFF the control after the drain pump ON for 3 minutes.

  • Page 17: Dry Operation

    7-2. DRY OPERATION <How to operate> 1 Press POWER ON/OFF button. TIME SUN MON TUE WED THU FRI SAT TIMER 2 Press the operation MODE button to display DRY. AFTER AFTER ERROR CODE FUNCTION ˚F˚C FILTER ˚F˚C 3 Press the TEMP. button to set the desired temperature. WEEKLY SIMPLE ONLY1Hr.

  • Page 18: Fan Operation

    7-3. FAN OPERATION <How to operate> 1 Press POWER ON/OFF button. TIME SUN MON TUE WED THU FRI SAT 2 Press the operation MODE button to display FAN. TIMER AFTER AFTER ERROR CODE FUNCTION ˚F˚C FILTER ˚F˚C WEEKLY SIMPLE ONLY1Hr. AUTO OFF TEMP.

  • Page 19: Heat Operation

    7-4. HEAT OPERATION <How to operate> 1 Press POWER ON/OFF button. 2 Press the operation MODE button to display HEAT. TIME SUN MON TUE WED THU FRI SAT 3 Press the TEMP. button to set the desired temperature. TIMER AFTER AFTER ERROR CODE FUNCTION...
  • Page 20 From the preceding page Control modes Control details Remarks 2-3. Thermo OFF mode 2. Fan When the thermoregulating function changes to OFF, the indoor fan operates in [Extra low]. 2-4. Heat defrosting mode The indoor fan stops. 3. Drain pump No drain pump operation However, when the control changes from COOL or DRY operation, the drain pump operates for 3 minutes.
  • Page 21 7-5. AUTO OPERATION [AUTOMATIC COOL/HEAT CHANGE OVER OPERATION] <How to operate> 1 Press POWER ON/OFF button. TIME SUN MON TUE WED THU FRI SAT 2 Press the operation MODE button to display AUTO. TIMER AFTER AFTER ERROR CODE FUNCTION 3 Press the TEMP. button to set the desired temperature. ˚F˚C FILTER ˚F˚C...

  • Page 22: Trouble Shooting

    TROUBLE SHOOTING 8-1. HOW TO CHECK THE PARTS PCFY-P15NGMU-E PCFY-P24NGMU-E PCFY-P30NGMU-E PCFY-P36NGMU-E Parts name Check points Room temperature Disconnect the connector then measure the resistance using a tester. thermistor (TH21) (Surrounding temperature 50°F~86°F) Liquid pipe temperature thermistor (TH22) Normal Abnormal Refer to the next page for the details.
  • Page 23 <Thermistor characteristic graph> Thermistor <Room temperature detection> (TH21) Thermistor for Thermistor <Liquid pipe temperature detection> (TH22) lower temperature Thermistor <Gas pipe temperature detection> (TH23) Thermistor R =15k' ± 3% < Thermistor for lower temperature > Fixed number of B=3480K ± 2% Rt=15exp { 3480( 273+(t-32)/1.8 30_F...
  • Page 24 <Output pulse signal and the valve operation> Closing a valve : 1 Output Output (Phase) Opening a valve : 4 number The output pulse shift as above order. 1. When linear expansion valve operation stops, all output phase become OFF. 2.

  • Page 25: Function Of Dip Switch

    8-2. FUNCTION OF DIP SWITCH PCFY-P15NGMU-E PCFY-P24NGMU-E PCFY-P30NGMU-E PCFY-P36NGMU-E Operation by switch Switch Pole Function Remarks Room temperature thermistor Indoor unit Built-in remote controller Address board position Filter clogging detection Provided Not provided <At delivery> Filter cleaning sign 2500hr 100hr 1 2 3 4 5 6 7 8 9 10 Air intake Effective...
  • Page 26 Switch Operation by switch Remarks Address board Ceiling height can be changed depends on SW A setting. (High) <At delivery> Set the ceiling (Standard) height (Low) Address board When the optional high performance filter ele- <At delivery> ments (filter casement) is attached to the unit, Option Option be sure to set switch to the option side in...
  • Page 27 8-3. TEST POINT DIAGRAM 8-3-1. Indoor controller board PCFY-P15NGMU-E PCFY-P24NGMU-E PCFY-P30NGMU-E PCFY-P36NGMU-E CN29 Pipe temperature CN2D CN2M CN3A thermistor/Gas (TH23) Connect to the indoor Connect to the terminal block (TB5) Connect to the terminal block (TB15) power board (CN2S) (M-NET transmission connecting wire) (MA-Remote controller connecting wire) 12.5-13.7V DC (Pin1 1 (+)) 24-30V DC (non-polar)
  • Page 28 8-3-2. Indoor power board PCFY-P15NGMU-E PCFY-P24NGMU-E PCFY-P30NGMU-E PCFY-P36NGMU-E 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 3 208/230V AC...

  • Page 29: Indoor Unit

    DISASSEMBLY PROCEDURE INDOOR UNIT : PCFY-P15NGMU-E PCFY-P24NGMU-E PCFY-P30NGMU-E PCFY-P36NGMU-E OPERATING PROCEDURE PHOTOS & ILLUSTRATIONS 1. Removing the air intake grille Figure 1 (1) Slide the intake grille holding knobs at backward to open the intake grille. (2) When the intake grille opens, push the stoppers on the rear hinges (at two locations) to pull out the intake grille.
  • Page 30 OPERATING PROCEDURE PHOTOS & ILLUSTRATIONS 3. Removing the fan motor Photo 2 (1) Remove the intake grille. (2) Disconnect the fan motor connector. Motor set screws (3) Remove the screw for removing the motor support at both Screws left and right side. (4) Loosen the set screws at the fan motor side of the con- necting joint.
  • Page 31 OPERATING PROCEDURE PHOTOS & ILLUSTRATIONS 6. Removing the vane motor Photo 4 (1) Remove the intake grille. Screws (2) Remove the left side panel. Relay connector of (3) Remove the relay connector of vane motor. the vane motor (4) Remove the electrical box. (5) Remove the screws of vane motor, then remove vane motor.
  • Page 32 OPERATING PROCEDURE PHOTOS & ILLUSTRATIONS 9. Removing the drain pan Photo 8 (1) Remove the air intake grille. (2) Remove the beam. (3) Remove the side panel (right and left). (4) Remove the under panel. Remove the screws of the right and left side drain pan.

  • Page 33: Parts List

    PARTS LIST (non-RoHS compliant) ELECTRICAL PARTS PCFY-P15NGMU-E PCFY-P24NGMU-E PCFY-P30NGMU-E PCFY-P36NGMU-E TEMP. ON/OFF Q'ty/set Price Wiring Recom- Remarks PCFY-P • NGMU-E Parts No. Parts Name Diagram mended Specifications (Drawing No.) Unit Amount Symbol Q'ty T7W E10 255 440V CAPACITOR T7W E12 255 CAPACITOR 440V T7W E07 255...
  • Page 34 STRUCTURAL PART PCFY-P15NGMU-E 11 12 Part number that is circled is not shown in the figure. Q'ty/set Price Wiring Recom- Remarks mended Parts No. Parts Name Specifications PCFY- Diagram (Drawing No.) Unit Amount Q'ty P15NGMU-E Symbol T7W E01 666 S.PLATE-L R01 A15 500 L.L FILTER R01 17J 061...
  • Page 35 STRUCTURAL PART PCFY-P24NGMU-E PCFY-P30NGMU-E 11 12 13 Part number that is circled is not show in the figure. Q'ty/set Price Wiring Recom- Remarks PCFY- Diagram Parts No. Parts Name Specifications mended (Drawing No.) Unit Amount Symbol Q'ty P24NGMU-E P30NGMU-E R01 17J 662 LEFT SIDE PANEL R01 35J 662 LEFT SIDE PANEL...
  • Page 36 STRUCTURAL PART PCFY-P36NGMU-E Part number that is circled is not shown in the figure. Q'ty/set Price Wiring Recom- Remarks Parts No. Parts Name Specifications Diagram mended PCFY- (Drawing No.) Unit Amount Symbol Q'ty P36NGMU-E R01 35J 662 LEFT SIDE PANEL S.PLATE-L T7W E00 666 T7W E01 676...
  • Page 37 FAN PARTS PCFY-P15NGMU-E Part number that is circled is not shown in the figure. Q'ty/set Price Wiring Recom- Remarks Parts No. Parts Name Specifications PCFY- Diagram mended (Drawing No.) Amount Unit Symbol Q'ty P15NGMU-E R01 17J 130 MOTOR LEG T7W B06 110 CASING R01 17J 114 SIROCCO FAN...
  • Page 38 FAN PARTS PCFY-P24NGMU-E PCFY-P30NGMU-E Part number that is circled is not shown in the figure. Q'ty/set Price Remarks Wiring Recom- Parts Name Specifications Parts No. PCFY- Diagram mended (Drawing No.) Unit Amount Symbol Q'ty P24NGMU-E P30NGMU-E R01 29J 130 MOTOR LEG R01 35J 130 MOTOR LEG R01 43E 126...
  • Page 39 FAN PARTS PCFY-P36NGMU-E 13·14 Part number that is circled is not shown in the figure. Q'ty/set Price Wiring Recom- Remarks Diagram PCFY- Parts No. Specifications mended Parts Name (Drawing No.) Unit Amount Symbol Q'ty P36NGMU-E R01 29J 100 SHAFT R01 41J 130 MOTOR LEG R01 43E 126 PIECE (MOTOR)

  • Page 40: Rohs Parts List

    RoHS PARTS LIST ELECTRICAL PARTS PCFY-P15NGMU-E PCFY-P24NGMU-E PCFY-P30NGMU-E PCFY-P36NGMU-E TEMP. ON/OFF Q'ty/set Price Wiring Recom- Remarks PCFY-P • NGMU-E Parts No. Parts Name Specifications Diagram mended (Drawing No.) Unit Amount Symbol Q'ty 440V T7W E15 255 CAPACITOR 440V T7W E18 255 CAPACITOR 440V T7W E19 255...
  • Page 41 STRUCTURAL PART PCFY-P15NGMU-E 11 12 Part number that is circled is not shown in the figure. Q'ty/set Price Recom- Wiring Remarks mended Parts No. Parts Name Specifications PCFY- Diagram (Drawing No.) Unit Amount P15NGMU-E Symbol Q'ty T7W E02 666 S.PLATE-L R01 A30 500 L.L FILTER R01 18J 061...
  • Page 42 STRUCTURAL PART PCFY-P24NGMU-E PCFY-P30NGMU-E 11 12 13 Part number that is circled is not show in the figure. Q'ty/set Price Wiring Recom- Remarks PCFY- Parts No. Parts Name Specifications Diagram mended (Drawing No.) Unit Amount Symbol Q'ty P24NGMU-E P30NGMU-E R01 18J 662 LEFT SIDE PANEL R01 36J 662 LEFT SIDE PANEL...
  • Page 43 STRUCTURAL PART PCFY-P36NGMU-E Part number that is circled is not shown in the figure. Q'ty/set Price Wiring Recom- Remarks Parts No. Parts Name Specifications Diagram mended PCFY- (Drawing No.) Unit Amount Symbol Q'ty P36NGMU-E R01 36J 662 LEFT SIDE PANEL T7W E03 666 S.PLATE-L T7W E09 676...
  • Page 44 FAN PARTS PCFY-P15NGMU-E Part number that is circled is not shown in the figure. Q'ty/set Price Wiring Recom- Remarks Parts No. Parts Name Specifications PCFY- Diagram mended (Drawing No.) Amount Unit Symbol Q'ty P15NGMU-E R01 31J 130 MOTOR LEG T7W B08 110 CASING R01 E16 114 SIROCCO FAN...
  • Page 45 FAN PARTS PCFY-P24NGMU-E PCFY-P30NGMU-E Part number that is circled is not shown in the figure. Q'ty/set Price Wiring Recom- Remarks Parts Name Specifications Parts No. PCFY- Diagram mended (Drawing No.) Unit Amount Symbol Q'ty P24NGMU-E P30NGMU-E R01 30J 130 MOTOR LEG R01 32J 130 MOTOR LEG R01 45E 126...
  • Page 46 FAN PARTS PCFY-P36NGMU-E 13·14 Part number that is circled is not shown in the figure. Q'ty/set Price Wiring Recom- Remarks PCFY- Diagram mended Parts No. Specifications Parts Name (Drawing No.) Unit Amount Symbol Q'ty P36NGMU-E R01 30J 100 SHAFT R01 33J 130 MOTOR LEG R01 45E 126 PIECE (MOTOR)

  • Page 47: Optional Parts

    OPTIONAL PARTS HIGH EFFICIENCY FILTER Part No. PAC-SE80KF-E PAC-SE81KF-E PAC-SE82KF-E PCFY-P24NGMU-E Applied Service Ref. PCFY-P15NGMU-E PCFY-P36NGMU-E PCFY-P30NGMU-E...
  • Page 48 HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO100-8310, JAPAN cCopyright 2005 MITSUBISHI ELECTRIC ENGINEERING CO., LTD. New publication, effective Aug. 2006 Distributed in Aug. 2006 No. OC343 REVISED EDITION-A PDF 9 Specifications subject to change without notice Distributed in Jun. 2005 No. OC343 PDF 10...

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