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SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
TECHNICAL & SERVICE MANUAL
Indoor unit
[Model Name]
PLFY-P05NFMU-E
PLFY-P08NFMU-E
PLFY-P12NFMU-E
PLFY-P15NFMU-E
PLFY-P18NFMU-E
Model name
indication
INDOOR UNIT
[Service Ref.]
PLFY-P05NFMU-E.TH
PLFY-P08NFMU-E.TH
PLFY-P12NFMU-E.TH
PLFY-P15NFMU-E.TH
PLFY-P18NFMU-E.TH
R410A
Notes:
• This manual describes service
data of the indoor units only.
• RoHS compliant products
have <G> mark on spec
name plate.
CONTENTS
1. SAFETY PRECAUTION .......................... 2
2. PARTS NAMES AND FUNCTIONS ........ 4
3. SPECIFICATIONS ................................. 12
4. 4-WAY AIR FLOW SYSTEM ................. 14
5. OUTLINES AND DIMENSIONS ............ 16
6. WIRING DIAGRAM ............................... 17
7. REFRIGERANT SYSTEM DIAGRAM ...... 18
8. TROUBLESHOOTING .......................... 19
9. DISASSEMBLY PROCEDURE ............. 27
PARTS CATALOG (OCB604)
December 2017
No. OCH604
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Table of Contents
Related Manuals for Mitsubishi Electric PLFY-P08NFMU-E
Summary of Contents for Mitsubishi Electric PLFY-P08NFMU-E
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Page 1: Table Of Contents
• This manual describes service [Model Name] [Service Ref.] data of the indoor units only. PLFY-P05NFMU-E.TH • RoHS compliant products PLFY-P05NFMU-E have <G> mark on spec name plate. PLFY-P08NFMU-E.TH PLFY-P08NFMU-E PLFY-P12NFMU-E.TH PLFY-P12NFMU-E PLFY-P15NFMU-E.TH PLFY-P15NFMU-E PLFY-P18NFMU-E.TH PLFY-P18NFMU-E CONTENTS 1. SAFETY PRECAUTION ......2 2. -
Page 2: Safety Precaution
SAFETY PRECAUTION CAUTIONS RELATED TO NEW REFRIGERANT Cautions for units utilizing refrigerant R410A Use the following tools specifically designed for Do not use the existing refrigerant piping. use with R410A refrigerant. The old refrigerant and lubricant in the existing piping The following tools are necessary to use R410A refrigerant. - Page 3 [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 4: Parts Names And Functions
PARTS NAMES AND FUNCTIONS 2-1. Indoor Unit Filter Removes dust and pollutants Horizontal Air Outlet from drawn in air. 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. - Page 5 2-2-1. Wired Remote Controller <PAR-32MAA> The functions of the function buttons change depending on the screen. Refer to the button function guide that appears at the bottom of the LCD for the functions they serve on a given screen. When the system is centrally controlled, the button function guide that corresponds to the locked button will not appear.
- Page 6 The main display can be displayed in 2 different modes: "Full" and "Basic". The initial setting is "Full". To switch to the "Basic" mode, change the setting on the Main display setting. <Full mode> <Basic mode> All icons are displayed for explanation. 2345 Cool Set temp.
- Page 7 Menu structure Press the button. MENU Main menu Move the cursor to the desired item with the buttons, and press the button. SELECT Vane · Louver · Vent. (Lossnay) High power Timer ON/OFF timer Auto-Off timer Weekly timer Restriction Temp. range Operation lock Energy saving Auto return...
- Page 8 Main menu list Setting and display items Setting details Vane · Louver · Vent. Use to set the vane angle. (Lossnay) • Select a desired vane setting from 5 different settings. Use to turn ON/OFF the louver. • Select a desired setting from "ON" and "OFF." Use to set the amount of ventilation.
- Page 9 Setting and display items Setting details Input Select "Input maintenance Info." from the Service menu to bring up the Maintenance maintenance information screen. The following settings can be made from the Maintenance Information screen. • Model name input • Serial No. input • Dealer information input LOSSNAY This setting is required only when the operation of City Multi units is interlocked with setting...
- Page 10 2-2-2. Wired Remote Controller <PAC-YT53CRAU> Note: The phrase "Wired remote controller" in this manual refers only to the PAC-YT53CRAU. 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.
- Page 11 2-3. Wireless remote controller Transmission area Not available Remote controller display Battery replacement indicator Set Temperature buttons OFF/ON button Mode button (Changes operation mode) Fan Speed button (Changes fan speed) Airflow button (Changes up/down airflow direction) i-see button Timer ON button Menu button Timer OFF button SET/SEND button...
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Page 12: Specifications
SPECIFICATIONS 3-1. SPECIFICATIONS Service Ref. PLFY-P05NFMU-E.TH PLFY-P08NFMU-E.TH PLFY-P12NFMU-E.TH PLFY-P15NFMU-E.TH PLFY-P18NFMU-E.TH power source single phase, 208/230V, 60 Hz cooling capacity *1 BTU/h 5,000 8,000 12,000 15,000 18,000 Power input kW 0.02 0.02 0.02 0.03 0.04 Current input A 0.19 0.22 0.23 0.28... - Page 13 3-2. ELECTRICAL PARTS SPECIFICATIONS Service ref. Symbol PLFY-P05NFMU-E.TH PLFY-P08NFMU-E.TH PLFY-P12NFMU-E.TH PLFY-P15NFMU-E.TH PLFY-P18NFMU-E.TH Parts name Thermistor (Room temperature TH21 Resistance 30°F/15.8", 50°F/9.6", 70°F/6.0", 80°/4.8", 90°F/3.9", 100°F/3.2" detection) Thermistor (Pipe temperature TH22 Resistance 30°F/15.8", 50°F/9.6", 70°F/6.0", 80°/4.8", 90°F/3.9", 100°F/3.2" detection/Liquid) Thermistor (Pipe temperature TH23 Resistance 30°F/15.8", 50°F/9.6", 70°F/6.0", 80°/4.8", 90°F/3.9", 100°F/3.2"...
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Page 14: Way Air Flow System
120° Ceiling surface Drain pipe Refrigerant pipe Electrical Box 4-2. FRESH AIR INTAKE AMOUNT & STATIC PRESSURE CHARACTERISTICS PLFY-P05NFMU-E.TH PLFY-P08NFMU-E.TH PLFY-P12NFMU-E.TH PLFY-P15NFMU-E.TH PLFY-P18NFMU-E.TH Taking air into the unit How to read curves Q … Designed amount of fresh air intake... - Page 15 4-4. FIXING HORIZONTAL VANE Horizontal vane of each air outlet can be fixed according to the environment where it is installed. Setting procedures 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 16: Outlines And Dimensions
OUTLINES AND DIMENSIONS PLFY-P05NFMU-E.TH PLFY-P08NFMU-E.TH PLFY-P12NFMU-E.TH PLFY-P15NFMU-E.TH PLFY-P18NFMU-E.TH Unit: inch(mm) OCH604... -
Page 17: Wiring Diagram
WIRING DIAGRAM PLFY-P05NFMU-E.TH PLFY-P08NFMU-E.TH PLFY-P12NFMU-E.TH PLFY-P15NFMU-E.TH PLFY-P18NFMU-E.TH OCH604... -
Page 18: Refrigerant System Diagram
REFRIGERANT SYSTEM DIAGRAM PLFY-P05NFMU-E.TH PLFY-P08NFMU-E.TH PLFY-P12NFMU-E.TH PLFY-P15NFMU-E.TH PLFY-P18NFMU-E.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 temperature detection) TH21... -
Page 19: Troubleshooting
TROUBLESHOOTING 8-1. COUNTERMEASURES FOR ERROR DURING TEST RUN If a problem occurs during test run, a code number will appear on the remote controller (or LED on the outdoor unit), and the air conditioning system will automatically cease operating. Refer to the connected outdoor unit service manual in order to determine the nature of the abnormality and apply corrective measure. - Page 20 8-2. HOW TO CHECK THE PARTS PLFY-P05NFMU-E.TH PLFY-P08NFMU-E.TH PLFY-P12NFMU-E.TH PLFY-P15NFMU-E.TH PLFY-P18NFMU-E.TH Parts name Check points Thermistor (TH21) Disconnect the connector then measure the resistance with a tester. (Room temperature detection) (At the ambient temperature 10 to 30:) Thermistor (TH22) (Pipe temperature detection/Liquid)
- Page 21 8-2-1. Thermistor Characteristic Graph <Thermistor characteristic graph> < Thermistor for lower temperature > Room temperature detection thermistor (TH21) Thermistor for Pipe temperature detection thermistor/liquid (TH22) lower temperature Pipe temperature detection thermistor/gas (TH23) Thermistor R =15 k" ± 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> Output Output (Phase) Closing a valve : 1 → 2 → 3 → 4 → 1 Opening a valve : 4 → 3 → 2 → 1 → 4 The output pulse shifts in above order. •...
- Page 23 8-2-3. DC Fan Motor (Fan Motor/Indoor Controller Board) Check method of indoor fan motor (fan motor/indoor controller 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 will damage the indoor controller board and fan motor) Self check Conditions : The indoor fan cannot turn around.
- Page 24 8-3. FUNCTION OF DIP SWITCH Operation by switch Effective Switch Pole Function Remarks timing Thermistor Built-in remote <Room temperature Indoor unit controller detection> position Filter clogging Provided Not provided detection Filter cleaning 2,500h 100h Indoor controller board Fresh air intake Effective Not effective Under...
- Page 25 Operation by switch Effective Switch Pole Function Remarks timing Setting ceiling height Depends on SW21-1, SW21-2 <Initial setting> Under — — operation — — 1 2 3 4 5 6 suspension — — SW21 — — Function selection SW21-1 SW21-2 Height Silent ─...
- Page 26 8-4. TEST POINT DIAGRAM Indoor controller board PLFY-P05NFMU-E.TH PLFY-P08NFMU-E.TH PLFY-P12NFMU-E.TH PLFY-P15NFMU-E.TH PLFY-P18NFMU-E.TH Vane motor (MV) 12 V pulse output LED2 Power supply (Wired remote controller) CN51 CN32 Centrally control Remote switch – : Control signal 12 V DC pulse input ( : +) –...
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Page 27: Disassembly Procedure
DISASSEMBLY PROCEDURE PLFY-P05NFMU-E.TH PLFY-P08NFMU-E.TH PLFY-P12NFMU-E.TH PLFY-P15NFMU-E.TH PLFY-P18NFMU-E.TH Be careful when removing heavy parts. OPERATING PROCEDURE PHOTOS & ILLUSTRATIONS Figure 1 1. Removing the air intake grille and air filter (1) Slide the knob of air intake grille to the direction of the arrow... - Page 28 OPERATING PROCEDURE PHOTOS Control box cover Photo 4 3. Removing the electrical parts (1) Loosen the 2 screws on the control box cover. (2) Slide the control box cover as indicated by the arrow to remove. <Electrical parts in the control box> •...
- Page 29 OPERATING PROCEDURE PHOTOS 6. Removing the pipe temperature thermistor/liquid (TH22) Photo 8 Pipe temperature Fan motor and pipe temperature thermistor/gas (TH23) thermistor/Gas (TH23) Band cable (1) Remove the panel. (Refer to procedure 2) (2) Remove the room temperature thermistor (TH21). (Refer to procedure 4) (3) Remove the drain pan.
- Page 30 OPERATING PROCEDURE PHOTOS Photo 11 8. Removing the drain pump (DP) and float switch (FS) Clamp (1) Remove the panel. (Refer to procedure 2) Screw Inner cover (2) Remove the room temperature thermistor (TH21). (Refer to procedure 4) (3) Remove the control box cover. (Refer to procedure 3) (4) Remove the drain pan.
- Page 31 OCH604...
- Page 32 HEAD OFFICE : TOKYO BUILDING, 2-7-3, MARUNOUCHI, CHIYODA-KU TOKYO 100-8310, JAPAN Specifications are subject to change without notice. cCopyright 2017 MITSUBISHI ELECTRIC CORPORATION Published in Dec. 2017 No. OCH604 Made in Japan...