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Mitsubishi Electric PLFY-P08NBMU-E2 Technical & Service Manual

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INDOOR UNIT FOR VRF SYSTEM
TECHNICAL & SERVICE MANUAL
Indoor unit
[Model Name]
PLFY-P08NBMU-E2
PLFY-P12NBMU-E2
PLFY-P15NBMU-E2
PLFY-P18NBMU-E2
PLFY-P24NBMU-E2
PLFY-P30NBMU-E2
PLFY-P36NBMU-E2
Model name
indication
INDOOR UNIT
[Service Ref.]
PLFY-P08NBMU-E2
PLFY-P12NBMU-E2
PLFY-P15NBMU-E2
PLFY-P18NBMU-E2
PLFY-P24NBMU-E2
PLFY-P30NBMU-E2
PLFY-P36NBMU-E2
R410A
Notes:
• This manual describes
service data of the indoor
units only.
• RoHS compliant products
have <G> mark on the
spec name plate.
CONTENTS
1. FEATURES ............................................. 3
3. SPECIFICATIONS ................................... 6
4. 4-WAY AIR FLOW SYSTEM ................. 10
6. WIRING DIAGRAM ............................... 14
9. TROUBLESHOOTING ......................... 23
10. DISASSEMBLY PROCEDURE ............. 32
PARTS CATALOG (OCB579)
March 2015
No. OCH579

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Summary of Contents for Mitsubishi Electric PLFY-P08NBMU-E2

  • Page 1: Table Of Contents

    INDOOR UNIT FOR VRF SYSTEM March 2015 No. OCH579 TECHNICAL & SERVICE MANUAL R410A Indoor unit Notes: [Model Name] [Service Ref.] • This manual describes PLFY-P08NBMU-E2 service data of the indoor units only. PLFY-P08NBMU-E2 • RoHS compliant products PLFY-P12NBMU-E2 have <G> mark on the spec name plate. PLFY-P12NBMU-E2 PLFY-P15NBMU-E2 PLFY-P15NBMU-E2 PLFY-P18NBMU-E2 PLFY-P18NBMU-E2 PLFY-P24NBMU-E2 PLFY-P24NBMU-E2 PLFY-P30NBMU-E2 PLFY-P30NBMU-E2 PLFY-P36NBMU-E2 PLFY-P36NBMU-E2 CONTENTS 1.
  • Page 2 Use the specified refrigerant only Never use any refrigerant other than that specified. Doing so may cause a burst, an explosion, or fire when the unit is being used, serviced, or disposed of. Correct refrigerant is specified 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. OCH579...

  • Page 3: Features

    FEATURES Models Cooling capacity / Heating capacity PLFY-P08NBMU-E2 8,000 / 9,000 BTU/h PLFY-P12NBMU-E2 12,000 / 13,500 BTU/h PLFY-P15NBMU-E2 15,000 / 17,000 BTU/h PLFY-P18NBMU-E2 18,000 / 20,000 BTU/h PLFY-P24NBMU-E2 24,000 / 27,000 BTU/h PLFY-P30NBMU-E2 30,000 / 34,000 BTU/h PLFY-P36NBMU-E2 36,000 / 40,000 BTU/h Indoor Unit 1. WIDE AIRFLOW The new wide shape vane capable of wide angle air supply provides comfort even at the corners of a room regardless of cooling and heating operation. A reduction in the air speed by 20% compared to the conventional product eliminates...

  • Page 4: Parts Names And Functions

    PARTS NAMES AND FUNCTIONS Indoor unit Drain pipe Filter Air outlet Liquid pipe Gas pipe i-see sensor (option) Vane Air intake (Intake grille) Wired remote controller 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 5 Display section Note: All icons are displayed for explanation purpose. CENTRAL icon *1 CHECK icon *2 Preset temperature *3 icon appears while the unit is operated in the energy-save mode icon appears when Operation lock setting is effective. icon appears when indoor unit functions are set up. (Refer to the Installation Manual.) Fan speed icon Vane icon...

  • Page 6: Specifications

    SPECIFICATIONS 3-1. SPECIFICATIONS Service Ref. PLFY-P08NBMU-E2 PLFY-P12NBMU-E2 PLFY-P15NBMU-E2 PLFY-P18NBMU-E2 Power source 1-Phase 208–230 V, 60 HZ Cooling capacity BTU/h 8,000 12,000 15,000 18,000 *1 (Nominal) Power input 0.03 0.03 0.03 0.04 Current input 0.31 0.31 0.31 0.33 Heating capacity BTU/h 9,000 13,500 17,000 20,000 *2 (Nominal) kcal/h Power input 0.02...
  • Page 7 Service Ref. PLFY-P24NBMU-E2 PLFY-P30NBMU-E2 PLFY-P36NBMU-E2 Power source 1-Phase 208–230 V, 60 HZ Cooling capacity BTU/h 24,000 30,000 36,000 *1 (Nominal) 10.5 Power input 0.05 0.05 0.09 Current input 0.47 0.50 0.87 Heating capacity BTU/h 27,000 34,000 40,000 (Nominal) 10.0 11.7 *2 kcal/h Power input 0.04 0.04 0.08 Current input 0.40 0.43 0.80...

  • Page 8: Sound Level

    3-2. SOUND LEVEL Sound level at anechoic room : Low- Mid2-Mid1 -High Sound level dB (A) PLFY-P-NBMU-E PLFY-P08NBMU-E2 27-28-29-31 PLFY-P12NBMU-E2 27-28-30-31 PLFY-P15NBMU-E2 28-29-30-32 PLFY-P18NBMU-E2 28-30-32-34 PLFY-P24NBMU-E2 30-32-35-37 PLFY-P30NBMU-E2 Measurement location 35-38-41-43 PLFY-P36NBMU-E2 * Measured in anechoic room. 3-3. NC CURVES...
  • Page 9 3-4. ELECTRICAL PARTS SPECIFICATIONS Service Ref. PLFY-P08NBMU-E2 Symbol PLFY-P15NBMU-E2 PLFY-P18NBMU-E2 PLFY-P24NBMU-E2 PLFY-P30NBMU-E2 PLFY-P36NBMU-E2 PLFY-P12NBMU-E2 Parts name Room temperature Resistance 30_F/15.8 k", 50_F/9.6 k", 70_F/6.0 k", 80_F/4.8 k", 90_F/3.9 k", 100_F/3.2 k" TH21 thermistor Liquid pipe thermistor TH22 Resistance 30_F/15.8 k", 50_F/9.6 k", 70_F/6.0 k", 80_F/4.8 k", 90_F/3.9 k", 100_F/3.2 k"...

  • Page 10: Way Air Flow System

    4-WAY AIR FLOW SYSTEM 4-1. PLACEMENT OF THE AIR OUTLETS • For this grille, the blowout direction comes in 11 patterns. Also, by setting the remote controller to the appropriate settings, you can adjust the air flow and speed. Select the settings from Table1 according to the location in which you want to install the unit. 1) Decide on the pattern of the airflow direction. <Table 1> 4-direction 3-direction 2-direction Pattern 1 Initial setting Pattern 4 One air outlet Pattern 6 2 air outlet fully closed fully closed Note: For 3 and 2-direction settings, please use the air outlet shutter plate (option). 2) According to the number of air outlets and height of the ceiling to install the unit, be sure to set up the switches (SWA, SWB) on the address board to the appropriate setting.
  • Page 11 4-2. BRANCH DUCT HOLE AND FRESH AIR INTAkE HOLE At the time of installation, use the duct holes (cut out) located at the positions shown in following diagram, as and when required. • A fresh air intake hole for the optional multi function casement can also be made. Note: The figures marked with * in the drawing below represent the dimensions of the main unit excluding those of the optional multi function casement. When installing the optional multi function casement, add 5-5/16” (135 mm) to the dimensions marked on the figure. When installing the branch ducts, be sure to insulate adequately. Otherwise, condensation and dripping may occur. Unit : in (mm) Fresh air intake hole diagram Fresh air intake hole 3-[1/8 ([2.8) burring hole Branch duct hole [4-29/32 ([125) burring hole pitch Indoor unit [3-15/16 ([100) cut out hole Ceiling...
  • Page 12 4-4. FRESH AIR INTAkE AMOUNT & STATIC PRESSURE CHARACTERISTICS PLFY-P08/12/18NBMU-E2 Multifunction casement + High efficiency filter Multifunction casement + Standard filter 50(20) 50(20) -50(-20) -50(-20) 2 - inlet 2 - inlet -100(-40) -100(-40) -150(-60) -150(-60) 1 - inlet 1 - inlet -200(-80) -200(-80) 6[CMM]...

  • Page 13: Outlines And Dimensions

    OUTLINES AND DIMENSIONS PLFY-P08NBMU-E2 PLFY-P12NBMU-E2 PLFY-P15NBMU-E2 PLFY-P18NBMU-E2 PLFY-P24NBMU-E2 PLFY-P30NBMU-E2 PLFY-P36NBMU-E2 Unit: in (mm) Ceiling hole 25/32~1-25/32(20~45) 33-27/32 to 35-13/16(860~910) 25/32 to 1-25/32(20~45) Detail connecting of branch duct (Both aspects) 31-7/8(810) Fresh air 3-15/16 3-15/16 (100) (100) Suspension bolt pitch 6-16/5...

  • Page 14: Wiring Diagram

    WIRING DIAGRAM PLFY-P08NBMU-E2 PLFY-P12NBMU-E2 PLFY-P15NBMU-E2 PLFY-P18NBMU-E2 PLFY-P24NBMU-E2 PLFY-P30NBMU-E2 PLFY-P36NBMU-E2 is the switch position. (RED) MODELS MODELS ADDRESS TO OUTDOOR UNIT CN43 BC CONTROLLER GRILLE BREAKER REMOTE CONTROLLER 1 2 3 4 5 6 1 2 3 4 5 6 (16A)

  • Page 15: Refrigerant System Diagram

    REFRIGERANT SYSTEM DIAGRAM PLFY-P08NBMU-E2 PLFY-P12NBMU-E2 PLFY-P15NBMU-E2 PLFY-P18NBMU-E2 PLFY-P24NBMU-E2 PLFY-P30NBMU-E2 PLFY-P36NBMU-E2 Refrigerant flow in cooling Refrigerant flow in heating Strainer (#100mesh) Gas pipe thermistor TH23 Gas pipe Liquid pipe thermistor TH22 Flare connection Liquid pipe Heat exchanger Linear expansion valve Strainer1 (#50mesh)

  • Page 16: Microprocessor Control

    MICROPROCESSOR CONTROL INDOOR UNIT CONTROL 8-1. COOL OPERATION <How to operate> 1 Press POWER ON/OFF button. 2 Press the operation MODE button to display COOL. 3 Press the TEMP. button to set the desired temperature. NOTE: The set temperature changes 2°F when the or button is pressed one time. Cooling 67 to 87°F Control modes Control details Remarks 1-1. Determinating thermostatic control function 1. Thermostatic control function (Function to prevent restarting for 3 minutes) • Room temperature ] desired temperature + 2°F ···Thermo-ON •...
  • Page 17 Control modes Remarks Control details 3. Drain pump 3-1. 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 18: Dry Operation

    8-2. DRY OPERATION <How to operate> 1 Press POWER ON/OFF button. 2 Press the operation MODE button to display DRY. 3 Press the TEMP. button to set the desired temperature. NOTE: The set temperature changes 2°F when the or button is pressed one time. Dry 67 to 87°F Control modes Remarks Control details 1-1. Determinating thermostatic control function 1. Thermostatic (Function to prevent restarting for 3 minutes) control function Setting the Dry thermo by the thermostat signal and the room temperature (TH21).

  • Page 19: Fan Operation

    8-3. FAN OPERATION <How to operate> 1 Press POWER ON/OFF button. 2 Press the operation MODE button to display FAN. Control modes Remarks Control details Set by remote controller. 1. Fan Type Fan speed notch 4 speeds + Auto type [Low], [Med2], [Med1], [High], [Auto] When [Auto] is set, fan speed becomes [Low]. 2-1.

  • Page 20: Heat Operation

    8-4. HEAT OPERATION <How to operate> 1 Press POWER ON/OFF button. 2 Press the operation MODE button to display HEAT. 3 Press the TEMP. button to set the desired temperature. NOTE: The set temperature changes 2°F when the or button is pressed one time. Heating 63 to 83°F. Control modes Remarks Control details 1-1. Determinating thermostatic control function 1. Thermostatic control function (Function to prevent restarting for 3 minutes) • Room temperature [ desired temperature −2°F ···Thermo-ON •...
  • Page 21 Control modes Control details Remarks · This control is 2-2. Preheating exclusion mode 2. Fan same for the When the condition changes the auxiliary heater ON to OFF (thermostat or model without operation stop, etc), the indoor fan operates in [Low] mode for 1 minute. auxiliary heater.

  • Page 22: When Unit Is Stopped Control Mode

    8-5. AUTO OPERATION [AUTOMATIC COOL/HEAT CHANGE OVER OPERATION] <How to operate> 1 Press POWER ON/OFF button. 2 Press the operation MODE button to display AUTO. 3 Press the TEMP. button to set the desired temperature. NOTE: The set temperature changes 2°F when the or button is pressed one time. Automatic 67 to 83°F Control details Control modes Remarks 1. Initial value of HEAT mode for room temperature < Desired temperature operation mode COOL mode for room temperature ] Desired temperature 2.

  • Page 23: Troubleshooting

    TROUBLESHOOTING 9-1. HOW TO CHECk THE PARTS PLFY-P08NBMU-E2 PLFY-P12NBMU-E2 PLFY-P15NBMU-E2 PLFY-P18NBMU-E2 PLFY-P24NBMU-E2 PLFY-P30NBMU-E2 PLFY-P36NBMU-E2 Parts name Check points Room temperature Disconnect the connector then measure the resistance with a tester. thermistor (TH21) (At the ambient temperature 50 to 86_F) Liquid pipe thermistor...
  • Page 24 9-1-1. 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 =15 k" ± 3% Fixed number of B=3480 ± 2% Rt=15exp { 3480( ) } 273+(t-32)/1.8 30_F 15.8 k" 50_F 9.6 k" 70_F 6.0 k" 80_F 4.8 k" 90_F 3.9 k" 100_F 3.2 k" Temperature (°F) 9-1-2. Linear expansion valve 1 Operation summary of the linear expansion valve • Linear expansion valve open/close through stepping motor after receiving the pulse signal from the indoor controller board.
  • Page 25 <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. Note: • When linear expansion valve operation stops, all output phases become OFF. • At phase interruption or when phase does not shift in order, motor does not rotate smoothly and motor will lock and vibrate. 2 Linear expansion valve operation • When the switch is turned on, 2200 pulse closing valve signal will be sent till it goes to point in order to define the valve position. Open • When the valve moves smoothly, there is no sound or vibration occurring from the linear expansion valves, however, when the pulse number moves from to or when the valve is locked, more sound can be heard than in a normal situation. • Sound can be detected by placing the ear against the screw driver handle while putting the screw driver tip to the linear expansion Close valve. Open Outdoor unit R410A model : 1400 pulse Outdoor unit R22 model : 2000 pulse Opening a valve...
  • Page 26 9-1-3. 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 causes trouble of the indoor controller board and fan motor) Self check Conditions : The indoor fan cannot rotate.
  • Page 27 Stop Auto restart function Effective Not effective Power ON/OFF by breaker Effective Not effective MODEL MODEL Indoor controller board PLFY-P08NBMU-E2 PLFY-P24NBMU-E2 1 2 3 4 5 6 Before 1 2 3 4 5 6 Capacity PLFY-P30NBMU-E2 power PLFY-P12NBMU-E2 1–6 <Initial setting>...
  • Page 28 The black square (■) indicates a switch position. Effective Switch Pole Operation by switch Remarks timing Address board Note: Ceiling height can be changed depending on SWB setting. (High ceiling) <Initial setting> Ceiling 1–3 (Standard) height PLFY-P08/12/15/18/24/30NBMU-E2 selector (Silent) Silent Standard High ceiling 4 direction 8.2 ft [2.5 m] 8.9 ft [2.7m] 11.5 ft [3.5 m] 3 direction...
  • Page 29 Effective Switch Pole Operation by switch Remarks timing Indoor controller board • To operate each indoor unit by each remote controller when installed 2 indoor units or more are near, Pair No. setting is necessary. 1 Pair No. setting is available with the 4 patterns (Setting patters A to D). 2 Make setting for J41, J42 of indoor controller board and the Pair No.
  • Page 30 9-3. TEST POINT DIAGRAM 9-3-1. Indoor controller board PLFY-P08NBMU-E2 PLFY-P12NBMU-E2 PLFY-P15NBMU-E2 PLFY-P18NBMU-E2 PLFY-P24NBMU-E2 PLFY-P30NBMU-E2 PLFY-P36NBMU-E2 CN60 CN6Y CN4Y Linear expansion valve (LEV) out- i-see sensor motor output i-See sensor put 12 V DC pulse output 12 V DC pulse output CN3A CN52 Connect to the terminal block (TB15) Remote indicator (MA-Remote controller connecting wire) 1–2: Status lamp 12 V DC (1 : +) Fan motor output (SW1-5 OFF) 1–3: 8.7–13 V DC (Pin1 (+)) Thermostat ON (SW1-5 ON) 1–3: Cooling/Dry status lamp 12 V DC (1 : +) Vane motor output 1–4: Heating status lamp 12 V DC pulse 12 V DC (1 : +) CN51 CN32...
  • Page 31 9-3-2. Circuit board PLFY-P08NBMU-E2 PLFY-P12NBMU-E2 PLFY-P15NBMU-E2 PLFY-P18NBMU-E2 PLFY-P24NBMU-E2 PLFY-P30NBMU-E2 PLFY-P36NBMU-E2 Function setting Ceiling height Discharge outlet number selector selector SW12 SW11 Address setting Address setting Option selector 10s digit 1s digit OCH579...

  • Page 32: Disassembly Procedure

    DISASSEMBLY PROCEDURE PLFY-P08NBMU-E2 PLFY-P12NBMU-E2 PLFY-P15NBMU-E2 PLFY-P18NBMU-E2 PLFY-P24NBMU-E2 PLFY-P30NBMU-E2 PLFY-P36NBMU-E2 Be careful when removing heavy parts. OPERATING PROCEDURE PHOTOS & ILLUSTRATIONS 1. Removing the air intake grille Figure 1 Filter (1) Slide the knob of air intake grille toward the arrow 1 to open the air intake grille. (2) Remove drop prevention hook from the panel. (3) Slide the shaft in the hinge to the direction of the arrow 2 and remove the air intake grille. Photo 1 2. Removing the room temperature thermistor (TH21) (1) Remove the air intake grille and the filter. (See Figure 1) Address board (2) Remove the 2 screws from the electrical box cover.
  • Page 33 OPERATING PROCEDURE PHOTOS & ILLUSTRATIONS Photo 3 6. Removing the fan and fan motor (MF) (1) Remove the electrical box. (See Photo 2) Coil plate (2) Remove the bell mouth (3 screws). (See Photo 2) (3) Remove the turbo fan nut. (4) Pull out the turbo fan. (5) Remove the wire cover (3 screws). (6) Remove 2 wiring clamps. Fan motor (7) Disconnect the connector of the fan motor (CNMF). (8) Remove the 3 nuts and washers and rubber mounts of the Clamp fan motor. Wire cover fixing screw Washer Rubber mount Figure 2 7. Removing the panel (1) Remove the air intake grille and the filter. (See Figure 1) Screw (2) Disconnect the connector CNV (White/20P). Panel Screw Detail...
  • Page 34 OPERATING PROCEDURE PHOTOS Photo 7 9. Removing the liquid pipe temperature thermistor (TH22) Gas pipe temp. thermistor (TH23) and gas pipe temperature thermistor (TH23) (1) Remove the drain pan. (See Photo 6) (2) Remove the turbo fan. (Refer to procedure 6) (3) Remove the 2 wiring clamps. (See Photo 3) (4) Remove the coil plate (2 screws). (5) Remove the thermistors which are inserted into the holders installed to the thin copper pipe. (6) Disconnect the 4-pin white connector (CN44). Liquid pipe temp. thermistor (TH22) Photo 8 10 Removing the drain pump (DP) and float switch (FS) (1) Remove the drain pan. (See Photo 6) (2) Cut the hose band and remove the hose.
  • Page 35 OPERATING PROCEDURE PHOTOS Photo 10 11. Removing the heat exchanger Linear expansion Heat exchanger (1) Remove the drain pan. (See Photo 6) valve (2) Remove the 3 screws of the piping cover, and pull out piping cover. Piping cover (3) Remove the 2 screws of coil plate. (4) Remove the 2 screws of the coil. Heat exchanger (5) Remove the screw of the coil support. fixing screw (6) Pull out the heat exchanger. Coil support OCH579...
  • Page 36 HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU TOKYO 100-8310, JAPAN New publication, effective Mar. 2015 cCopyright 2015 MITSUBISHI ELECTRIC CORPORATION Specifications are subject to change without notice. Distributed in Mar. 2015 No. OCH579 Made in Japan...

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