Mitsubishi Electric CITY MULTI Series Technical & Service Manual
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Also See for CITY MULTI Series:
- Installation manual (400 pages) ,
- Technical & service manual (45 pages) ,
- Technical & service manual (35 pages)
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SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
TECHNICAL & SERVICE MANUAL
Indoor unit
[Model names]
PKFY-P08NHMU-E2
PKFY-P12NHMU-E2
PKFY-P15NHMU-E2
PKFY-P18NHMU-E2
INDOOR UNIT
[Service Ref.]
PKFY-P08NHMU-E2
PKFY-P12NHMU-E2
PKFY-P15NHMU-E2
PKFY-P18NHMU-E2
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 ..................................... 5
3. OUTLINES AND DIMENSIONS .............. 7
4. WIRING DIAGRAM ................................. 8
5. REFRIGERANT SYSTEM DIAGRAM .......... 9
6. MICROPROCESSOR CONTROL ......... 10
7. TROUBLESHOOTING .......................... 15
8. DISASSEMBLY PROCEDURE ............. 22
PARTS CATALOG (OCB515)
April 2012
No. OCH515
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Summary of Contents for Mitsubishi Electric CITY MULTI Series
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Page 1: Table Of Contents
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS April 2012 No. OCH515 TECHNICAL & SERVICE MANUAL R410A Indoor unit Note: [Model names] [Service Ref.] • This manual describes PKFY-P08NHMU-E2 PKFY-P08NHMU-E2 only service data of the indoor units. • RoHS compliant products PKFY-P12NHMU-E2 PKFY-P12NHMU-E2 have <G>... -
Page 2: Part Names And Functions
Use the specifi ed refrigerant only Never use any refrigerant other than that specifi ed. Doing so may cause a burst, an explosion, or fi re when the unit is being used, serviced, or disposed of. Correct refrigerant is specifi ed in the manuals and on the spec labels provided with our products. We will not be held responsible for mechanical failure, system malfunction, unit breakdown or accidents caused by failure to follow the instructions. - Page 3 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 4 Wired remote controller Note: The phrase "Wired remote controller" in this manual refers only to the PAR-21MAA. If you need any information for the other remote controller, please refer to either the installation manual or initial setting manual which are included in remote controller's box.
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Page 5: Specification
SPECIFICATION 2-1. Specifi cations PKFY-P08NHMU-E2 PKFY-P12NHMU-E2 PKFY-P15NHMU-E2 PKFY-P18NHMU-E2 Service Ref. Power source 1-phase 208-230V 60Hz Cooling capacity (Nominal) 8,000 12,000 15,000 18,000 Btu/h 0.03 0.03 0.03 0.03 Power input 0.30 0.30 0.30 0.30 Current input Heating capacity (Nominal ) 9,000 13,500 17,000 20,000... - Page 6 2-2. Electrical parts specifi cations Service Ref. Symbol PKFY-P08NHMU-E2 PKFY-P12NHMU-E2 PKFY-P15NHMU-E2 PKFY-P18NHMU-E2 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 thermistor 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 TH23 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...
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Page 7: Outlines And Dimensions
OUTLINES AND DIMENSIONS 15-3/16(387) 7-1/2(192) PKFY-P08NHMU-E2 Unit : inch (mm) Top side PKFY-P12NHMU-E2 PKFY-P15NHMU-E2 PKFY-P18NHMU-E2 Mount board 23-9/16(599) Front side Right side 9-3/4(249) 3/16(5) Left side 27-1/16(688) 2-1/8 6-1/16(155) (55) Knockout hole 35-5/16(898) Knockout hole for left piping for right piping Front side(Grille open) Sleeve Through hole... -
Page 8: Wiring Diagram
WIRING DIAGRAM PKFY-P08NHMU-E2 NAME NAME SYMBOL SYMBOL INDOOR CONTROLLER BOARD TH21 THERMISTOR ROOM TEMP. DETECTION PKFY-P12NHMU-E2 CN24 CONNECTOR ( 32°F/15k ,77°F /5.4k ) EXTERNAL HEATER CN32 REMOTE SWITCH TH22 PIPE TEMP. DETECTION / LIQUID PKFY-P15NHMU-E2 CN51 CENTRALLY CONTROL ( 32°F/15k ,77°F /5.4k ) CN52 REMOTE INDICATION TH23... -
Page 9: Refrigerant System Diagram
REFRIGERANT SYSTEM DIAGRAM PKFY-P08NHMU-E2 PKFY-P12NHMU-E2 PKFY-P15NHMU-E2 PKFY-P18NHMU-E2 Gas pipe thermistor TH23 Strainer (#50mesh) Gas pipe Gas pipe thermistor TH24 Flare connection Liquid pipe thermistor TH22 Heat exchanger Liquid pipe Linear expansion valve Strainer1 (#50mesh) Room temparature thermistor TH21 Strainer2 (#100mesh) Strainer (#100mesh) Unit : mm (inch) Service Ref. -
Page 10: 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 AFTER AFTER Press the operation MODE button to display COOL. ERROR CODE FUNCTION û Fû C FILTER û... - Page 11 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 12 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 13 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 14 From the preceding page Control modes Control details Remarks 2-3. Thermo OFF mode 2. Fan When the thermostat function changes to OFF, the indoor fan operates in [Extra low]. 2-4. Heat defrosting mode The indoor fan stops. (1) Initial setting: OFF HEAT···[last setting] 3.
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Page 15: Troubleshooting
TROUBLESHOOTING 7-1. HOW TO CHECK THE PARTS PKFY-P08, 12, 15, 18NHMU-E2 Parts name Check points Room temperature Disconnect the connector then measure the resistance with a tester. thermistor (TH21) (At the ambient temperature 50°F~86°F) Liquid pipe temperature Normal Abnormal thermistor (TH22) Refer to the next page for the details. - Page 16 <Output pulse signal and the valve operation> Closing a valve : 1 Output Output Opening a valve : 4 (Phase) The output pulse shifts in above order. Note: • When linear expansion valve operation stops, all output phase become OFF. •...
- Page 17 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...
- Page 18 7-2. Function of Dip switch PKFY-P08NHMU-E2 PKFY-P12NHMU-E2 PKFY-P15NHMU-E2 PKFY-P18NHMU-E2 Operation by switch Effective Switch Pole Function Remarks timing Thermistor<Room temperature> Indoor unit Built-in remote controller Address board position Filter clogging detection Provide Not provide <Initial setting> Filter cleaning sign 2,500 hr 100 hr 1 2 3 4 5 6 7 8 9 10 Fresh air intake...
- Page 19 Effective Operation by switch Remarks Switch timing SW11 SW12 SW11 Address board 1s digit How to set addresses address Example : If address is "3", remain SW12 <Initial setting> setting (for over 10) at "0", and match SW11 (for 1 to 9) SW12 SW11 SW12...
- Page 20 7-3. TEST POINT DIAGRAM CNMF Connect to the fan motor (MF) 7-3-1. Indoor controller board 1-3 : DC294~325V 4-3 : DC15V PKFY-P08NHMU-E2 5-3 : DC0~6V PKFY-P12NHMU-E2 6-3 : DC0 or DC15V (Stop) PKFY-P15NHMU-E2 DC7.5V (Operation) (12VDC pulse) PKFY-P18NHMU-E2 FUSE 3.15A 250V Power supply for indoor controller board 1-3 : 208/230VAC...
- Page 21 7-3-2. Wireless remote controller board PKFY-P08NHMU-E2 PKFY-P12NHMU-E2 PKFY-P15NHMU-E2 PKFY-P18NHMU-E2 LD101 Connect to the indoor controller board (I.B) 7-3-3. Address board PKFY-P08NHMU-E2 PKFY-P12NHMU-E2 PKFY-P15NHMU-E2 PKFY-P18NHMU-E2 Function setting 1 2 3 4 5 6 7 8 9 10 SW12 SW11 SW14 Address setting Address setting Branch No.
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Page 22: Disassembly Procedure
DISASSEMBLY PROCEDURE PKFY-P08NHMU-E2 PKFY-P12NHMU-E2 PKFY-P15NHMU-E2 PKFY-P18NHMU-E2 Be careful when removing heavy parts. OPERATION PROCEDURE PHOTOS & ILLUSTRATIONS 1. REMOVING THE LOWER SIDE OF THE INDOOR Figure 1 UNIT FROM THE INSTALLATION PLATE (1) Remove the front panel. (2) Insert the screw driver to the corner hole at both left and right side as shown in the figure 1. - Page 23 OPERATION PROCEDURE PHOTOS Photo 3 3. REMOVING THE INDOOR CONTROLLER BOARD Screw (side cover) Electrical box AND WIRELESS CONTROLLER BOARD Screw (top cover) cover (top) Water cover Electrical box (1) Remove the front panel. (Refer to procedure 2) cover (side) (2) Remove the electrical box covers (screw 4 ×...
- Page 24 OPERATION PROCEDURE PHOTOS 5. REMOVING THE NOZZLE ASSEMBLY (with VANE Electrical box cover (side) Photo 7 and VANE MOTOR) AND DRAIN HOSE Electrical box cover (top) Screw (side cover) (1) Remove the front panel (Refer to procedure 2). (2) Remove the electrical box cover. Screw (top cover) (3) Disconnect the vane motor connector (CN151) on the...
- Page 25 OPERATION PROCEDURE PHOTOS 9. REMOVING THE HEAT EXCHANGER AND LEV Photo 13 Screw (side cover) Electrical box (1) Remove the front panel (Refer to procedure 2) and the Screw (top cover) cover (top) corner panel at right lower side. Water cover Electrical box (2) Remove the electrical box (Refer to procedure 4) and the cover (side)
- Page 26 HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU TOKYO 100-8310, JAPAN Copyright 2012 MITSUBISHI ELECTRIC CORPORATION Distributed in Apr. 2012 No. OCH515 New publication, effective Apr. 2012 Made in Japan Specifications are subject to change without notice.