Mitsubishi Electric PCFY-P15NKMU-E Technical & Service Manual
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SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
TECHNICAL & SERVICE MANUAL
Indoor unit
[Model names]
PCFY-P15NKMU-E
PCFY-P24NKMU-E
PCFY-P30NKMU-E
PCFY-P36NKMU-E
INDOOR UNIT
[Service Ref.]
PCFY-P15NKMU-E
PCFY-P24NKMU-E
PCFY-P30NKMU-E
PCFY-P36NKMU-E
Model name
indication
R410A
R22
Note:
• This manual describes only
service data of the indoor
units.
• RoHS compliant products
have <G> mark on the spec
name plate.
CONTENTS
1. PART NAMES AND FUNCTIONS .......... 2
2. SPECIFICATION ..................................... 4
3. OUTLINES AND DIMENSIONS .............. 8
4. WIRING DIAGRAM ............................... 11
5. REFRIGERANT SYSTEM DIAGRAM ........ 12
6. MICROPROCESSOR CONTROL ............... 13
7. TROUBLESHOOTING .......................... 20
8. DISASSEMBLY PROCEDURE ............. 29
PARTS CATALOG (OCB450)
February 2009
No. OCH450
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Table of Contents
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Summary of Contents for Mitsubishi Electric PCFY-P15NKMU-E
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Page 1: Table Of Contents
No. OCH450 TECHNICAL & SERVICE MANUAL R410A Indoor unit [Model names] [Service Ref.] Note: • This manual describes only PCFY-P15NKMU-E PCFY-P15NKMU-E service data of the indoor units. PCFY-P24NKMU-E • RoHS compliant products PCFY-P24NKMU-E have <G> mark on the spec name plate. -
Page 2: Part Names And Functions
PART NAMES AND FUNCTIONS Indoor unit Louver Air outlet Vane Filter (Inside of Air intake) Air intake... -
Page 3: Wired Remote Controller
Wired remote controller Display Section Day-of-Week “Sensor” indication Shows the current day of the week. Displayed when the remote controller sensor is used. For purposes of this explanation, Time/Timer Display all parts of the display are shown Shows the current time, unless the simple or Auto Off as lit. -
Page 4: Specification
SPECIFICATION 2-1. SPECIFICATIONS Model PCFY-P15NKMU-E PCFY-P24NKMU-E PCFY-P30NKMU-E PCFY-P36NKMU-E Power source 1-phase 208/230V 60Hz Cooling capacity *1 kW 10.6 *1 Btu/h ( Nominal ) 15 , 000 24 , 000 30 , 000 36 , 000 Power input 0.03 0.04 0.09 0.11... -
Page 5: Sound Level
2-2. ELECTRICAL PARTS SPECIFICATIONS Service Ref. PCFY-P30NKMU-E Symbol PCFY-P15NKMU-E PCFY-P24NKMU-E PCFY-P36NKMU-E Parts name Room temperature TH21 Resistance 30°F/15.8kΩ, 50°F/9.6kΩ, 70°F/6.0kΩ, 80°F/4.8kΩ, 90°F/3.9kΩ, 100°F/3.2kΩ thermistor Liquid pipe thermistor TH22 Resistance 30°F/15.8kΩ, 50°F/9.6kΩ, 70°F/6.0kΩ, 80°F/4.8kΩ, 90°F/3.9kΩ, 100°F/3.2kΩ Gas pipe thermistor TH23 Resistance 30°F/15.8kΩ, 50°F/9.6kΩ, 70°F/6.0kΩ, 80°F/4.8kΩ, 90°F/3.9kΩ, 100°F/3.2kΩ... - Page 6 2-4. NC CURVES PCFY-P15NKMU-E PCFY-P24NKMU-E External static pressure : 0Pa External static pressure : 0Pa Power source : 208V, 230V, 60Hz Power source : 208V, 230V, 60Hz High Middle2 High Middle2 Middle1 Middle1 70.0 70.0 65.0 65.0 60.0 60.0 NC-60 NC-60 55.0...
- Page 7 2-5. FRESH AIR INTAKE AMOUNT & STATIC PRESSURE CHARACTERISTICS PCFY-P15NKMU-E ■ How to read curves 50(20) Duct characteristics Curve in the at site graphs Q … Designed amount of fresh air intake -50(-20) <CMM(CFM)> A … Static pressure loss of fresh air...
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Page 8: Outlines And Dimensions
OUTLINES AND DIMENSIONS PCFY-P15NKMU-E Unit : inch(mm) - Page 9 PCFY-P24NKMU-E Unit : inch(mm)
- Page 10 PCFY-P30, 36NKMU-E Unit : inch(mm)
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Page 11: Wiring Diagram
WIRING DIAGRAM PCFY-P15, 24, 30, 36NKMU-E LED on indoor board for service [LEGEND] NAME SYMBOL NAME SYMBOL Mark Meaning Function I. B INDOOR CONTROLLER BOARD TH22 PIPE TEMP. DETECTION / LIQUID THERMISTOR Main Power supply (Indoor unit:208-230V) LED1 Main power supply (32°F/15ΚΩ, 77°F/5.4ΚΩ... -
Page 12: Refrigerant System Diagram
REFRIGERANT SYSTEM DIAGRAM PCFY-P15NKMU-E PCFY-P24NKMU-E PCFY-P30NKMU-E PCFY-P36NKMU-E Refrigerant flow in cooling Refrigerant flow in heating Strainer (#100 mesh) Gas pipe thermistor TH23 Gas pipe Flare connection Liquid pipe thermistor TH22 Liquid pipe Heat exchanger Linear expansion valve Strainer1 (#50 mesh) -
Page 13: Microprocessor Control
MICROPROCESSOR CONTROL INDOOR UNIT CONTROL 6-1. COOL OPERATION <How to operate> Press POWER ON/OFF button. TIME SUN MON TUE WED THU FRI SAT TIMER Press the operation MODE button to display COOL. AFTER AFTER ERROR CODE FUNCTION û Fû C FILTER û... - Page 14 Control modes Remarks Control details 3. Drain pump 3-1. Drain pump control •Drain pump is always 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), the drain pump will be kept on for 3 minutes, then turns OFF.
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Page 15: Dry Operation
6-2. DRY OPERATION <How to operate> Press POWER ON/OFF button. TIME SUN MON TUE WED THU FRI SAT TIMER AFTER AFTER Press the operation MODE button to display DRY. ERROR CODE FUNCTION û Fû C FILTER û Fû C Press the TEMP. button to set the desired temperature. WEEKLY SIMPLE ONLY1Hr. -
Page 16: Fan Operation
6-3. FAN OPERATION <How to operate> Press POWER ON/OFF button. TIME SUN MON TUE WED THU FRI SAT Press the operation MODE button to display FAN. TIMER AFTER AFTER ERROR CODE FUNCTION û Fû C FILTER û Fû C WEEKLY SIMPLE ONLY1Hr. -
Page 17: Heat Operation
6-4. HEAT OPERATION <How to operate> Press POWER ON/OFF button. Press the operation MODE button to display HEAT. TIME SUN MON TUE WED THU FRI SAT Press the TEMP. button to set the desired temperature. TIMER AFTER AFTER ERROR CODE FUNCTION NOTE: The set temperature changes 2°F when the button is... - Page 18 From the preceding page Control details Control modes 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. 3-1. Drain pump control 3.
- Page 19 6-5. AUTO OPERATION [AUTOMATIC COOL/HEAT CHANGE OVER OPERATION] <How to operate> Press POWER ON/OFF button. TIME SUN MON TUE WED THU FRI SAT Press the operation MODE button to display AUTO. TIMER AFTER AFTER ERROR CODE FUNCTION Press the TEMP. button to set the desired temperature. û...
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Page 20: Troubleshooting
TROUBLESHOOTING 7-1. HOW TO CHECK THE PARTS PCFY-P15NKMU-E PCFY-P24NKMU-E PCFY-P30NKMU-E PCFY-P36NKMU-E Parts name Check points Room temperature Disconnect the connector then measure the resistance using a tester. thermistor (TH21) (At the ambient temperature 50 F~86 F) Liquid pipe thermistor (TH22) -
Page 21: Linear Expansion Valve
7-1-1. Thermistor <Thermistor characteristic graph> < Thermistor for lower temperature > Room temperature thermistor (TH21) Thermistor for Liquid pipe temperature thermistor (TH22) lower temperature Gas pipe temperature thermistor (TH23) Thermistor R =15kΩ ± 3% Fixed number of B=3480 ± 2% Rt=15exp { 3480( 273+(t-32)/1.8 30°F... - Page 22 <Output pulse signal and the valve operation> Closing a valve : 1 → 2 → 3 → 4 → 1 Output Output Opening a valve : 4 → 3 → 2 → 1 → 4 (Phase) The output pulse shifts in above order. Φ1 Note: Φ2...
- Page 23 7-1-3. DC Fan motor (fan motor/indoor controller circuit board) Check method of DC fan motor (fan motor/indoor controller circuit 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 circuit board and fan motor.) Self check...
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Page 24: Function Of Dip Switch
7-2. FUNCTION OF DIP SWITCH Operation by switch Effective Switch Pole Function Remarks timing Thermistor <Room temperature Address board Built-in remote controller Indoor unit detection> position <Initial setting> Filter clogging detection Provided Not provided Filter cleaning 2,500 hr 100 hr 1 2 3 4 5 6 7 8 9 10 Note : Fresh air intake... - Page 25 Effective Switch Pole Operation by switch Remarks timing Address board * Ceiling height can be changed depending on SWA setting. (High ceiling) Under <Initial setting> Ceiling operation (Standard) height (Silent) selector suspension High ceiling Silent Standard P15, P24 8.2ft.(2.5m) 8.9ft.(2.7m) 11.5ft.(3.5m) 13.8ft.(4.2m) P30, P36...
- Page 26 Effective Switch Pole Operation by switch Remarks timing <Initial setting> • To operate each indoor unit by each remote controller when installed 2 indoor units or more are near, Pair No. setting is necessary. Pattern A Pair No. setting is available with the 4 patterns (Setting patters A to D). Make setting for J41, J42 of indoor controller board and the Pair No.
- Page 27 7-3. TEST POINT DIAGRAM 7-3-1. Indoor controller board PCFY-P15NKMU-E PCFY-P24NKMU-E PCFY-P30NKMU-E PCFY-P36NKMU-E CN6Y CN60 i-see sensor motor output Linear expansion valve (LEV) 12VDC pulse output output 12VDC pulse output CN3A Connect to the terminal block (TB15) CN4Y (MA-Remote controller connecting wire) i-See sensor : 8.7-13V DC (Pin...
- Page 28 7-3-2. Address board PCFY-P15NKMU-E PCFY-P24NKMU-E PCFY-P30NKMU-E PCFY-P36NKMU-E Ceiling height Function setting selector SW12 SW11 SW14 Address setting Address setting Option selector Branch No. 10ths DIGIT 1st DIGIT...
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Page 29: Disassembly Procedure
DISASSEMBLY PROCEDURE PCFY-P15NKMU-E PCFY-P24NKUM-E Be careful when removing heavy parts. PCFY-P30NKMU-E PCFY-P36NKMU-E (Photo: PCFY-P36NKMU-E) OPERATING PROCEDURE PHOTOS & ILLUSTRATIONS Figure 1 1. Removing the air intake grille (1) Slide the air intake grille holding knobs (at 2 or 3 loca- tions) to the rear to open the air intake grille. - Page 30 OPERATING PROCEDURE PHOTOS & ILLUSTRATIONS 3. Removing the room temperature thermistor (TH21) Photo 4 (1) Remove the air intake grille. (See Figure 1,2) Casing (2) Remove the screw from the beam and remove the beam. (See Photo 1) (3) Remove 2 screws from the electrical cover, and remove the electrical cover.
- Page 31 OPERATING PROCEDURE PHOTOS & ILLUSTRATIONS 5. Removing the fan (3 connection) Photo 9 (1) Remove the air intake grille. (See Figure 1,2) (2) Remove the screw from the beam and remove the beam. (See Photo 1) (3) Remove 2 screws from the electrical cover, and remove the electrical cover.
- Page 32 OPERATING PROCEDURE PHOTOS & ILLUSTRATIONS Photo 12 7. Removing the vane motor (1) Remove the air intake. (See Figure 1,2) Connector (2) Remove the right side panel. (See Figure 3) Vane motor and cover (3) Remove the connector of vane motor. (4) Remove 2 screws of vane motor cover , then remove vane motor.
- Page 33 OPERATING PROCEDURE PHOTOS & ILLUSTRATIONS Photo 17 10. Removing the pipe thermistors/Liquid (TH22) and Gas (TH23) (1) Remove the air intake grille. (See Figure 1,2) (2) Remove the left and right side panels. (See Figure 3) (3) Remove the under panel. (See Photo 13) (4) Remove the drain pan.
- Page 34 OPERATING PROCEDURE PHOTOS & ILLUSTRATIONS Photo 21 13. Removing the heat exchanger and LEV (1) Remove the air intake grille. (See Figure 1,2) (2) Remove the beam. (See Photo 1) (3) Remove the electrical cover. (See Photo 1) (4) Pull the electrical box downward. (See Photo 2) (5) Disconnect the connector CN60 (white) from the indoor controller board.
- Page 36 HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU TOKYO 100-8310, JAPAN Copyright 2009 MITSUBISHI ELECTRIC ENGINEERING CO., LTD. Distributed in Feb. 2009 No. OCH450 PDF 7 New publication, effective Feb. 2009 Made in Japan Specifications subject to change without notice...