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Mitsubishi Electric CITY MULTI PLFY Series Technical & Service Manual

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SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
TECHNICAL & SERVICE MANUAL
Indoor unit
[Model Name]
PLFY-WL04NFMU-E
PLFY-WL06NFMU-E
PLFY-WL08NFMU-E
PLFY-WL12NFMU-E
PLFY-WL15NFMU-E
Grille model
[Model Name]
SLP-18FAU
SLP-18FAEU
Model name
indication
INDOOR UNIT
[Service Ref.]
PLFY-WL04NFMU-E.TH
PLFY-WL06NFMU-E.TH
PLFY-WL08NFMU-E.TH
PLFY-WL12NFMU-E.TH
PLFY-WL15NFMU-E.TH
CONTENTS
1. SAFETY PRECAUTION ........................ 2
3. SPECIFICATIONS ................................. 4
4. 4-WAY AIRFLOW SYSTEM .................. 7
6. WIRING DIAGRAM ............................. 10
9. TROUBLESHOOTING ........................ 18
11. REMOTE CONTROLLER .................... 29
PARTS CATALOG (TCB123)
July 2023
No. TCH123

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Summary of Contents for Mitsubishi Electric CITY MULTI PLFY Series

  • Page 1: Table Of Contents

    SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS July 2023 No. TCH123 TECHNICAL & SERVICE MANUAL Indoor unit [Model Name] [Service Ref.] PLFY-WL04NFMU-E.TH PLFY-WL04NFMU-E PLFY-WL06NFMU-E.TH PLFY-WL06NFMU-E PLFY-WL08NFMU-E.TH PLFY-WL08NFMU-E PLFY-WL12NFMU-E.TH PLFY-WL12NFMU-E PLFY-WL15NFMU-E.TH PLFY-WL15NFMU-E Grille model [Model Name] SLP-18FAU SLP-18FAEU CONTENTS 1. SAFETY PRECAUTION ......2 2.

  • Page 2: Safety Precaution

    Indicates a parts that requires grounding. ing the safety features for these devices, or the use of accessories other than the ones that are recommended by Mitsubishi Electric may result in smoke, Indicates that caution must be taken with rotating parts. (This fire, or explosion.

  • Page 3: Parts Names And Functions

    PARTS NAMES AND FUNCTIONS 2-1. Indoor Unit Filter Removes dust and pollutants drawn from the air. Horizontal Air Outlet 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 4: Specifications

    SPECIFICATIONS 3-1. SPECIFICATIONS Model PLFY-WL04NFMU-E.TH PLFY-WL06NFMU-E.TH PLFY-WL08NFMU-E.TH PLFY-WL12NFMU-E.TH PLFY-WL15NFMU-E.TH Power source 1-phase 208/230 V 60Hz Cooling capacity BTU/h 4,000 6,000 8,000 12,000 15,000 (Nominal) Power input 0.03 0.04 0.05 Current input 0.23 0.26 0.29 0.38 0.46 Heating capacity BTU/h 4,500 6,700 9,000 13,500...
  • Page 5 3-2. ELECTRICAL PARTS SPECIFICATIONS Service ref. Symbol PLFY-WL04NFMU-E.TH PLFY-WL06NFMU-E.TH PLFY-WL08NFMU-E.TH PLFY-WL12NFMU-E.TH PLFY-WL15NFMU-E.TH Parts name Thermistor (Room temperature TH21 Resistance 30°F/15.8", 50°F/9.6", 70°F/6.0", 80°F/4.8", 90°F/3.9", 100°F/3.2" detection) Thermistor Resistance 30°F/15.8", 50°F/9.6", 70°F/6.0", 80°F/4.8", 90°F/3.9", 100°F/3.2" (Pipe temperature TH22 detection/inlet) Thermistor (Pipe temperature TH23 Resistance 30°F/15.8", 50°F/9.6", 70°F/6.0", 80°F/4.8", 90°F/3.9", 100°F/3.2"...
  • Page 6 3-4. NOISE CRITERION CURVES TPLFYW04FM1W0A TPLFYW06FM1W0A TPLFYW08FM1W0A SPL(dB) LINE SPL(dB) LINE SPL(dB) LINE High High High Medium Medium Medium NC-70 NC-70 NC-70 NC-60 NC-60 NC-60 NC-50 NC-50 NC-50 NC-40 NC-40 NC-40 NC-30 NC-30 NC-30 Approximate minimum Approximate minimum Approximate minimum audible limit on NC-20 audible limit on...

  • Page 7: Way Airflow System

    4-WAY AIRFLOW SYSTEM 4-1. FRESH AIR INTAKE (Location for installation) At the time of installation, use the duct holes (cut out) located at the positions shown in following diagram, as and when required. Fresh air intake Detail drawing of fresh air intake 5-1/2 Burring hole Cut out hole...
  • Page 8 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.

  • Page 9: Outlines And Dimensions

    OUTLINES AND DIMENSIONS Unit: inch(mm) TCH123...

  • Page 10: Wiring Diagram

    WIRING DIAGRAM Detail of SW11, SW12 and SW14 GRILLE i-see Sensor TO NEXT SW14 SW12 SW11 CORNER PANEL INDOOR (OPTION PART) UNIT PULL i-see Sensor BRANCH No. 10s DIGIT 1s DIGIT FUSE(15A) See Fig.*1 Switches in the picture show “0”. SW21 SW22 SW14...

  • Page 11: Refrigerant System Diagram

    REFRIGERANT SYSTEM DIAGRAM Pipe temperature detection thermistor/ inlet TH22 Water inlet connection Water flow Manual air purge valve Pipe temperature detection thermistor/ outlet TH23 Water outlet connection Water flow Heat exchanger Room temperature detection thermistor TH21 WATER PIPE CONNECTION SIZE Unit: inch (mm) Service Ref.
  • Page 12 Control Mode Control Details Remarks 1. Temperature 1-1. Determining temperature adjustment function • The ON/OFF commands by the indoor unit adjustment (Function to prevent restarting for 3 minutes) thermostatic control function • Room temperature Set temperature + 2°F ···Thermo-ON are not an ON/OFF •...
  • Page 13 8-2. DRYING OPERATION <How to operate> Press ON/OFF button. Press [F1] button to display DRYING. Press [F2] [F3] button to set the set temperature. RETURN SELECT MENU HOLD <How to operate> Press POWER ON/OFF button. Press the operation MODE button to display DRYING. Press the TEMP.
  • Page 14 8-3. FAN OPERATION <How to operate> Press ON/OFF button. Press [F1] button to display FAN. RETURN SELECT MENU HOLD <How to operate> Press POWER ON/OFF button. Press the operation MODE button to display FAN. Control Mode Control Details Remarks 1. Temperature Set by remote controller.
  • Page 15 8-4. HEAT OPERATION <How to operate> Press ON/OFF button. Press [F1] button to display HEAT. Press [F2] [F3] button to set the set temperature. NOTE: The settable temperature range varies with the model of outdoor units and remote controller. RETURN SELECT MENU HOLD <How to operate>...
  • Page 16 Control Mode Control Details Remarks 2-1. Hot adjust mode "Heat Standby" will be displayed during the The fan controller becomes the hot adjuster mode for the following conditions. hot adjust mode. When starting the HEAT operation When the temperature adjustment function changes from OFF to ON. The step change When release the HEAT defrosting operation of A to B will not be...
  • Page 17 8-5. AUTO OPERATION [AUTOMATIC COOL/HEAT CHANGE OVER OPERATION] <How to operate> Press ON/OFF button. Press [F1] button to display AUTO. Press [F2] [F3] button to set the set temperature. NOTE: The settable temperature range varies with the model of outdoor units and remote controller. RETURN SELECT MENU HOLD...

  • Page 18: Troubleshooting

    TROUBLESHOOTING 9-1. HOW TO CHECK THE PARTS Parts name Checkpoints Thermistor (TH21) Disconnect the connector then measure the resistance with a multimeter. (Room temperature detection) (At the ambient temperature 50°F ~ 86°F) Thermistor (TH22) Normal Abnormal (Pipe temperature detection/inlet) Thermistor (TH23) Ω...
  • Page 19 Parts name Checkpoints Flow control valve Disconnect the connector then measure the resistance between terminals with a multimeter. (FCV) CN8A Refer to "8-1-2. Flow control valve". Yellow Orange Normal Abnormal Green Blue Purple-Brown Orange-Brown Blue-Brown Green-Brown Open or short Purple (Optional parts) White 55 Ω...
  • Page 20 9-1-2. Flow control valve 1) Summary of flow control valve (FCV) operation The FCV is operated by a stepping motor, which operates by receiving a pulse signal from the indoor control board. The FCV position changes in response to the pulse signal. Flow control valve Control board Connector...
  • Page 21 9-1-3. Drain pump Purple Black 1. Check if the drain float switch works properly. 2. Check if the drain pump works and drains water properly in cooling operation. 3. If no water drains, confirm that the check code 2502 will not be displayed 10 minutes after the operation starts. Note: The drain pump for this model is driven by the internal DC motor, so it is not possible to measure the resistance between the terminals.
  • Page 22 9-2. 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 23 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 ─...
  • Page 24 9-3. TEST POINT DIAGRAM Indoor controller board CN3M CN2A M-NET transmission connecting wire MA-Remote controller 24-30 VDC (non polar) 8.7-13 VDC (non-polar) – LED2 Vane motor (MV) Power supply 12 V pulse output (Wired remote controller) SW21 CN52 Number of air outlets and height Remote indicator of the ceiling –...

  • Page 25: Disassembly Procedure

    DISASSEMBLY PROCEDURE : Indicates the visible parts in the photos/figures. Be careful when removing heavy parts. OPERATING PROCEDURE PHOTOS/ FIGURES 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 Grille hook Air intake grille 1 to open the air intake grille.
  • Page 26 OPERATING PROCEDURE PHOTOS/ FIGURES 3. Removing the electrical parts Control box cover Photo 4 (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 27 OPERATING PROCEDURE PHOTOS/ FIGURES 6. Removing the pipe temperature thermistor/ inlet (TH22) Photo 8 Pipe temperature and pipe temperature thermistor/ outlet (TH23) thermistor/ outlet (TH23) (1) Remove the panel. (Refer to procedure 2) Band (2) Remove the room temperature thermistor (TH21). (Refer to procedure 4) (3) Remove the drain pan.
  • Page 28 OPERATING PROCEDURE PHOTOS/ FIGURES 8. Removing the drain pump (DP) and float switch (FS) Photo 11 Clamp (1) Remove the panel. (Refer to procedure 2) (2) Remove the room temperature thermistor (TH21). (Refer to Screw Inner cover procedure 4) (3) Remove the control box cover. (Refer to procedure 3) (4) Remove the drain pan.

  • Page 29: Remote Controller

    REMOTE CONTROLLER 11-1. REMOTE CONTROLLER FUNCTIONS <PAR-41MAA> Controller interface 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 30 Display The main display can be displayed in two different modes: “Full” and “Basic”. The initial setting is “Full”. To switch to the “Basic” mode, change the setting on the Main display setting. (Refer to operation manual included with remote controller.) <Full mode>...
  • Page 31 Menu structure Press the MENU button. Main menu [SELECT/HOLD] Move the cursor to the desired item with the buttons, and press the button. Operation Vane · Louver · Vent. (Lossnay) High power Comfort Manual vane angle 3D i-see Sensor Timer menu Timer ON/OFF timer Auto-OFF timer...
  • Page 32 Continue from the previous page. Maintenance menu Error information Filter information Cleaning Auto descending panel Descending operation Descending adjustment Service menu Test run menu Test run Drain pump test run Maintenance information Model name input Serial No. input Dealer information input Initialize maintenance info.
  • Page 33 Main menu list Main Setting and display items Setting details menu Operation 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. •...
  • Page 34 Main Setting and display items Setting details menu Initial Basic Main/Sub When connecting 2 remote controllers, one of them needs to be designated as setting setting a sub controller. Clock Use to set the current time. Daylight Set the daylight saving time. saving time Administrator The administrator password is required to make the settings for the following...
  • Page 35 <PAC-YT53CRAU> Note: Note: The phrase "Wired remote controller" in this manual refers only to the TAC-YT53CRAU. The phrase "Wired remote controller" in this manual refers only to the TAC-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 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 36 <PAR-SL101A-E> Controller interface Transmission area Remote controller display 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 Weekly timer ON/OFF button* CANCEL button...
  • Page 37 11-2. ERROR INFORMATION When an error occurs, the following screen will appear. Check the error status, stop the operation, and consult your dealer. 1. Check code, error unit, refrigerant address, model name, and se- Error information rial number will appear. Error code The model name and serial number will appear only if the informa- Error unit...
  • Page 38 • Checking the error information Maintenance menu While no errors are occurring, page 2/2 of the error information can be Error information viewed by selecting "Error information" from the Maintenance menu. Filter information Errors cannot be reset from this screen. Cleaning Main menu: RETURN Cursor...
  • Page 39 11-3. SERVICE MENU Maintenance password is required 1. Select "Service" from the Main menu, and press the [SELECT/HOLD] button. Main Main menu *At the main display, the menu button and select "Service" to make the Service maintenance setting. 2. When the Service menu is selected, a window will appear asking for the pass- Service menu word.
  • Page 40 11-4. TEST RUN 11-4-1. PAR-41MAA 1. Select "Service" from the Main menu, and press the [SELECT/HOLD] button. Test run Input maintenance info. Settings Check Select "Test run" with the F1 or F2 button, and press the [SELECT/HOLD] button. Others : RETURN SELECT MENU RETURN...
  • Page 41 11-4-2. PAR-SL101A-E 1. Press the button to stop the air conditioner. • If the weekly timer is enabled ( is on), press the button to disable it ( is off). 2. Press the button for 5 seconds. • comes on and the unit enters the service mode. 3.
  • Page 42 11-5. FUNCTION SETTING 11-5-1. PAR-41MAA 1. Select ˝Service˝ from the Main menu, and press the [SELECT/HOLD] button. Settings menu Function setting Lossnay Select ˝Setting˝ from the Service menu, and press the [SELECT/HOLD] button. Service menu: MENU Cursor Select ˝Function setting˝, and press the [SELECT/HOLD] button. SELECT MENU RETURN...
  • Page 43 11-5-2. PAR-SL101A-E 1. Going to the function select mode Press the button between of 5 seconds. (Start this operation from the status of remote controller display turned off.) [CHECK] is lit and ˝00˝ blinks. (Fig. 11-1) button to set the ˝50˝. Press the Direct the wireless remote controller toward the receiver of the indoor unit and press the...
  • Page 44 11-6. ERROR HISTORY 1. Select ˝Service˝ from the Main menu, and press the [SELECT/HOLD] button. Test run Input maintenance info. Settings Check Others RETURN Select ˝Check˝ with the F1 or F2 button, and press the [SELECT/HOLD] button. SELECT MENU RETURN HOLD 2.
  • Page 45 11-7. SELF-DIAGNOSIS 11-7-1. PAR-41MAA 1. Select ˝Service˝ from the Main menu, and press the [SELECT/HOLD] button. Diagnosis Self check Select ˝Check˝ from the Service menu, Remote controller check and press the [SELECT/HOLD] button. Service menu: MENU Select ˝Diagnosis˝ from the Check menu, Cursor and press the [SELECT/HOLD] button.
  • Page 46 11-7-2. PAR-SL101A-E button 1 to stop the air conditioner. 1. Press the button 3 is on), press the is off). to disable it ( button 2 for 5 seconds. 2. Press the button 5 to select the refrigerant address (M-NET address) B 3.
  • Page 47 11-8. REMOTE CONTROLLER CHECK If operations cannot be completed with the remote controller, diagnose the remote controller with this function. 1. Select "Service" from the Main menu, and Diagnosis press the [SELECT/HOLD] button. Self check Remote controller check Select "Check" from the Service menu, and press the [SELECT/HOLD] button.
  • Page 48 HEAD OFFICE : TOKYO BUILDING, 2-7-3, MARUNOUCHI, CHIYODA-KU TOKYO 100-8310, JAPAN MITSUBISHI ELECTRIC CONSUMER PRODUCTS (THAILAND) CO., LTD. 700/406 MOO 7, TAMBON DON HUA ROH, AMPHUR MUANG, CHONBURI 20000 THAILAND Published: Jul. 2023. No. TCH123 Made in Thailand Specifications are subject to change without notice.

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