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Mitsubishi Electric PLA-SM71EA2 Service Manual
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Mitsubishi Electric PLA-SM71EA2 Service Manual

Mitsubishi Electric PLA-SM71EA2 Service Manual

Split-type, heat pump air conditioners, ceiling cassettes r32/r410a, indoor unit, grille
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SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
SPLIT-TYPE, AIR CONDITIONERS
SERVICE MANUAL
Indoor unit
[Model Name]
[Service Ref.]
PLA-SM71EA2.UK
PLA-SM71EA2
PLA-SM100EA2.UK
PLA-SM100EA2
PLA-SM125EA2.UK
PLA-SM125EA2
PLA-SM140EA2.UK
PLA-SM140EA2
Grille model
[Model Name]
[Service Ref.]
PLP-6EA
PLP-6EA
PLP-6EAL
PLP-6EAL
PLP-6EAJ
PLP-6EAJ
PLP-6EALM2
PLP-6EALM2
Model name
indication for
MAIN UNIT
INDOOR UNIT
R32/R410A
PLP-6EAR1
PLP-6EALR1
Model name
indication for GRILLE
October 2021
CONTENTS
1. REFERENCE MANUAL ······················· 2
2. SAFETY PRECAUTION ······················· 2
3. PARTS NAMES AND FUNCTIONS ········ 8
4. SPECIFICATIONS ······························ 9
5. NOISE CRITERION CURVES ············· 11
6. OUTLINES AND DIMENSIONS ··········· 12
7. WIRING DIAGRAM ··························· 13
9. TROUBLESHOOTING ······················· 15
10. FUNCTION SETTING ························ 30
11. SPECIAL FUNCTION ························ 31
12. DISASSEMBLY PROCEDURE ············ 35
13. REMOTE CONTROLLER ··················· 42
PARTS CATALOG (OCB784)
No. OCH784

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Summary of Contents for Mitsubishi Electric PLA-SM71EA2

  • Page 1: Table Of Contents

    SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS October 2021 SPLIT-TYPE, AIR CONDITIONERS No. OCH784 SERVICE MANUAL R32/R410A Indoor unit [Model Name] [Service Ref.] PLA-SM71EA2.UK PLA-SM71EA2 PLA-SM100EA2.UK PLA-SM100EA2 PLA-SM125EA2.UK PLA-SM125EA2 PLA-SM140EA2.UK PLA-SM140EA2 Grille model [Model Name] [Service Ref.] PLP-6EA PLP-6EAR1 PLP-6EA PLP-6EAL PLP-6EALR1...

  • Page 2: Reference Manual

    REFERENCE MANUAL OUTDOOR UNIT’S SERVICE MANUAL Model Name Service Ref. Service Manual No./Parts Catalog No. SUZ-SM71VA SUZ-SM71VA.TH OCH706/OCB706 PUZ-SM140VKA PUZ-SM140VKA.TH OCH708/OCB708 PUZ-SM140YKA PUZ-SM140YKA.TH PUZ-SM100/125/140VKA2 PUZ-SM100/125/140VKA2.TH PUZ-SM100/125/140YKA2 PUZ-SM100/125/140YKA2.TH SUZ-SA71VA3 SUZ-SA71VA3.TH TCH030/TCB030 SUZ-SA100VA2 SUZ-SA100VA2.TH PUHZ-SP125/140VKA PUHZ-SP125/140VKA.TH OCH671/OCB671 PUHZ-SP100/125/140YKA PUHZ-SP100/125/140YKA.TH SAFETY PRECAUTION MEANINGS OF SYMBOLS DISPLAYED ON THE UNIT This mark is for R32 refrigerant only.
  • Page 3 2-1. ALWAYS OBSERVE FOR SAFETY Before obtaining access to terminal, all supply circuits must be disconnected. 2-2. CAUTIONS RELATED TO NEW REFRIGERANT Cautions for units utilizing refrigerant R32/R410A Precautions during the repair service. Preparation before the repair service. • Prepare the proper tools. •...
  • Page 4 [1] Warning for service (1) Do not alter the unit. (2) For installation and relocation work, follow the instructions in the Installation Manual and use tools and pipe components specifically made for use with refrigerant specified in the outdoor unit installation manual. (3) Ask a dealer or an authorized technician to install, relocate and repair the unit.
  • Page 5 [4] Cautions for unit using R32 refrigerant Basic work procedures are the same as those for conventional units using refrigerant R410A. However, pay careful attention to the following points. (1) Information on servicing (1-1) Checks on the Area Prior to beginning work on systems containing flammable refrigerants, safety checks are necessary to ensure that the risk of ignition is minimized.
  • Page 6 (3) Repair to intrinsically Safe Components Do not apply any permanent inductive or capacitance loads to the circuit without ensuring that this will not exceed the permissible voltage and current permitted for the equipment in use. Intrinsically safe components are the only types that can be worked on while live in the presence of a flammable atmos- phere.
  • Page 7 a) Become familiar with the equipment and its operation. b) Isolate system electrically. c) Before attempting the procedure, ensure that: • mechanical handling equipment is available, if required, for handling refrigerant cylinders; • all personal protective equipment is available and being used correctly; •...

  • Page 8: Parts Names And Functions

    [5] Service tools Use the below service tools as exclusive tools for R32/R410A refrigerant. Refer to the spec name plate on outdoor unit for the type of refrigerant being used. Tool name Specifications Gauge manifold · Use the existing fitting specifications . (UNF1/2) ·...

  • Page 9: Specifications

    SPECIFICATIONS Service Ref. PLA-SM71EA2.UK Mode Cooling Heating Power supply (phase, cycle, voltage) Single phase, 50Hz, 230 V Input 0.04 0.04 0.27 Running current 0.25 External finish (Grille) Munsell 1.0Y 9.2/0.2 Heat exchanger Plate fin coil Fan (drive) o No. Turbo fan (direct) o 1 Fan motor output 0.05...
  • Page 10 Service Ref. PLA-SM140EA2.UK Mode Cooling Heating Power supply (phase, cycle, voltage) Single phase, 50Hz, 230 V Input 0.10 0.10 Running current 0.66 0.64 External finish (Grille) Munsell 1.0Y 9.2/0.2 Heat exchanger Plate fin coil Fan(drive) o No. Turbo fan (direct) o 1 Fan motor output 0.120 Airflow (Low-Medium2-Medium1-High)

  • Page 11: Noise Criterion Curves

    NOISE CRITERION CURVES PLA-SM71EA2.UK PLA-SM100EA2.UK NOTCH SPL(dB) LINE NOTCH SPL(dB) LINE High High Medium1 Medium1 Medium2 Medium2 NC-70 NC-70 NC-60 NC-60 NC-50 NC-50 NC-40 NC-40 NC-30 NC-30 APPROXIMATE APPROXIMATE THRESHOLD OF THRESHOLD OF HEARING FOR HEARING FOR NC-20 NC-20 CONTINUOUS...

  • Page 12: Outlines And Dimensions

    OUTLINES AND DIMENSIONS Unit: mm OCH784...

  • Page 13: Wiring Diagram

    WIRING DIAGRAM [LEGEND] <Table 1> SW1 (MODEL SELECTION) Manufacture/Service SYMBOL NAME SYMBOL NAME 1 2 3 4 5 6 INDOOR CONTROLLER BOARD TERMINAL BLOCK (INDOOR/OUTDOOR CN2L CONNECTOR (LOSSNAY) CONNECTING LINE) CN32 CONNECTOR (REMOTE SWITCH) TERMINAL BLOCK (REMOTE CONTROLLER <Table 2> SW2 (CAPACITY CODE) TB5,TB6 CN41 CONNECTOR (HA TERMINAL-A)

  • Page 14: Refrigerant System Diagram

    REFRIGERANT SYSTEM DIAGRAM Strainer (#50) Heat exchanger Refrigerant GAS pipe connection (Flare) Thermistor TH5 (Cond./eva. temperature) Refrigerant flow in cooling Refrigerant flow in heating Refrigerant LIQUID pipe connection (Flare) Thermistor TH2 (Pipe temperature/liquid) Thermistor TH1 (Room temperature) Strainer (#50) Distributor with strainer (#50) OCH784...

  • Page 15: Troubleshooting

    TROUBLESHOOTING 9-1. TROUBLESHOOTING <Check code displayed by self-diagnosis and actions to be taken for service (summary)> Present and past check codes are logged, and they can be displayed on the wired remote controller or controller board of out- door unit. Actions to be taken for service, which depends on whether or not the trouble is reoccurring in the field, are summa- rized in the table below.
  • Page 16 Refer to the following tables for details on the check codes. [Output pattern A] Beeper sounds Beep Beep Beep Beep Beep Beep Beep 1 st 2 nd 3 rd n th 1 st 2 nd OPERATION · · · Repeated INDICATOR lamp blinking pattern...
  • Page 17 • If the unit cannot be operated properly after the test run, refer to the following table to find out the cause. Symptom Cause Wired remote controller For about 2 minutes after power-on Please Wait • For about 2 minutes after power-on, operation of the remote controller is not possible due to system startup.
  • Page 18 Note: Errors to be detected in outdoor unit, such as codes starting with F, U or E (excluding E0 to E7), are not covered in this document. 9-3. SELF-DIAGNOSIS ACTION TABLE Please refer to the outdoor unit's service manual for the details. Abnormal point and detection method Countermeasure Check code...
  • Page 19 Abnormal point and detection method Countermeasure Check code Cause Drain pump lock protection operation 1 Error postponement, if drain pump stops 1 Malfunction of drain pump 1 Check if drain pump works. for 5 seconds continuously while drain 2 Clogged drain pump 2 Check if drain pump works.
  • Page 20 Abnormal point and detection method Countermeasure Check code Cause Pipe temperature thermistor/ 1–3 Check resistance value of thermistor. Condenser-Evaporator (TH5) For characteristics, refer to (P1). 1 The unit is in 3-minute resume protec- 1 Defective thermistor 2 Check contact failure of connector (CN44) tion mode if short/open of thermistor is characteristics on the indoor controller board.
  • Page 21 Abnormal point and detection method Countermeasure Check code Cause Indoor/outdoor unit communication error Note: Check LED display on the outdoor control (Signal receiving error) circuit board. (Connect A-control service 1 Abnormal if indoor controller board tool, PAC-SK52ST.) cannot receive any signal normally for 6 Refer to outdoor unit service manual.
  • Page 22 Abnormal point and detection method Countermeasure Check code Cause Fan motor trouble 12 Refer to "9-6-2. DC Fan Motor (fan motor/ 1 Defective fan motor indoor controller board)". 2 Defective indoor controller board Abnormal refrigerant circuit During Cooling, Dry, or Auto Cooling 1 Abnormal operation of 4-way 1 When this error occurs, be sure to replace operation, the following conditions are...
  • Page 23 9-4. TROUBLESHOOTING OF PROBLEMS Note: Refer to the outdoor unit's service manual for the detail of remote controller. Phenomena Cause Countermeasure (1) LED2 on indoor controller board • When LED1 on indoor controller board is also off. is off. 1 Power supply of rated voltage is not supplied to out- 1 Check the voltage of outdoor power door unit.
  • Page 24 Note: Refer to the outdoor unit's service manual for the detail of remote controller. Phenomena Cause Countermeasure (2) LED2 on indoor controller board Check indoor/outdoor unit connecting wire • When LED1 on indoor controller board is also blinking. is blinking. Connection failure of indoor/outdoor unit connecting for connection failure.
  • Page 25 9-5. EMERGENCY OPERATION 9-5-1. When wireless remote controller fails or its battery is exhausted When the remote controller cannot be used When the batteries of the remote controller run out or the remote control- ler malfunctions, the emergency operation can be done using the emer- gency buttons on the grille.
  • Page 26 9-6. HOW TO CHECK THE PARTS Parts name Check method and criterion Room temperature Measure the resistance with a multimeter. thermistor (TH1) (Parts temperature 10 to 30°C) Pipe temperature Abnormal Normal thermistor/liquid (TH2) Opened or short-circuited 4.3 to 9.6 k" Condenser/evaporator Refer to “9-6-1 Thermistor”.
  • Page 27 9-6-1. Thermistor <Thermistor Characteristic Graph> < Thermistor for lower temperature > Room temperature thermistor (TH1) Thermistors for Pipe temperature thermistor/liquid (TH2) lower temperature Condenser/evaporator temperature thermistor (TH5) : Thermistor resistance t: Temperature Thermistor R =15k" ± 3% Fixed number of B=3480 ± 1% exp B 273 + t 15 k"...
  • Page 28 9-7. TEST POINT DIAGRAM Indoor controller board Vane motor (MV) Connect to wired remote controller 12 V pulse output 10.4–14.6 V DC LED2 Power supply CN90 (Wired remote controller) Connect to the wireless remote controller board (CNB) Model selection LED3 J41, J42 Communication Jumper wire...
  • Page 29 MODEL SETTING Model 1 2 3 4 5 settings PLA-SM•EA2 MODELS SETTING 1 2 3 4 5 PLA-SM71EA2 1 2 3 4 5 Capacity PLA-SM100EA2 settings 1 2 3 4 5 PLA-SM125EA2 1 2 3 4 5 PLA-SM140EA2 <Initial setting>...

  • Page 30: Function Setting

    FUNCTION SETTING 10-1. UNIT FUNCTION SETTING BY THE REMOTE CONTROLLER Each function can be set as necessary using the remote controller. The setting of function for each unit can only be done by the remote controller. (1) Functions available when setting the unit number to 00 Refer to the service manual that comes with each outdoor unit.

  • Page 31: Special Function

    SPECIAL FUNCTION 11-1. OPERATION (AUTOMATIC FILTER ELEVATION GRILLE: PLP-6EAJ/PLP-6EAJE) (1) Normal operation String 1b 1 UP/DOWN UP/DOWN UP/DOWN Machine 1 Air intake grille is raised/lowered by Machine 2 commands of UP and DOWN. Air intake grille does not move under the state of no-load detection or obstacle detection.
  • Page 32 11-2. ELECTRICAL CIRCUIT (Controller board and wiring diagram (Panel)) 11-2-1 DIP SW LED2 LED4 [ LEGEND ] SYMBOL NAME [EMERGENCY OPERATION] ELEVATION PANEL CONTROLLER BOARD 1. If the wireless remote controller for ELEVATION PANEL is faulty or lost, operation LED ORANGE LED2 will be possible using the emergency up/down switch at the wireless signal receiver (INTAKE GRILLE CONDITION (See Table *1))
  • Page 33 11-3. TROUBLESHOOTING • Check the following points. Problem Possible Reason Corrective Action Intake grille does not function Air-conditioner is running. Stop running the air-conditioner and try again. with operation of the remote After recovering from power failure, try again. Power failure controller.
  • Page 34 Fig. 1 Operation pattern Refrigerant address Refrigerant address "00" "01" 1 [Back-up function only] Error occurs on main unit. Start operation Main OC-2 OC-1 Main unit Abnormal condition IC-1 Main 3(2) 3(2) unit unit unit Stop IC-2 IC-1 IC-2 2 [Rotation function] & [Back-up function] Error occurs on main unit.

  • Page 35: 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 filter Knob Air intake grille (1) Slide the knob of air intake grille toward the arrow to Grille open the air intake grille.
  • Page 36 OPERATING PROCEDURE PHOTOS/FIGURES 4. Removing the room temperature thermistor (TH1) Photo 3 Room temperature thermistor (TH1) (1) Remove the electrical box cover. (See Photo 1 and 2) Electrical box (2) Disconnect the connector CN20 (Red) from the indoor Indoor controller CN20 controller board.
  • Page 37 Be careful when removing heavy parts. OPERATING PROCEDURE PHOTOS/FIGURES Photo 6 6. Removing the electrical box Bell mouth fixing screws (1) Remove the electrical box cover (See Photo 1 and 2) and the connectors (Refer to procedure 5). (2) Remove the electrical box fixing screws (M5×10: 2 screw).
  • Page 38 OPERATING PROCEDURE PHOTOS/FIGURES Photo 10 8. Removing the fan motor (MF) (1) Remove the turbo fan. Nuts and washers (See Photo 7 and refer to procedure 7) Rubber mounts (2) Remove the lead cover (tapping screw 4×10: 2 screws). (See Photo 10) (3) Loosen the 2 clamps.
  • Page 39 OPERATING PROCEDURE PHOTOS/FIGURES Photo 13 10. Removing the drain pan Drain pan (1) Remove the electrical box. (See photo 3 and refer to procedure 6) (2) Remove the bell mouth (tapping screw 4×10 : 2 screws). (See Photo 6) (3) Remove the drain pan (screw M5×10: 4 screws). Drain pan Drain pan fixing screws...
  • Page 40 OPERATING PROCEDURE PHOTOS/FIGURES Photo 15 12. Removing the drain pump (DP) (1) Remove the drain pan. (Refer to procedure 10) (2) Cut the hose band and remove the hose. (3) Loosen the clamp of the drain pump. Drain pump Float switch (4) Remove the drain pump (tapping screw 4×10: 2 screws/2 hooks).
  • Page 41 OPERATING PROCEDURE PHOTOS/FIGURES Photo 16 13. Removing the float switch (FS) (1) Remove the drain pan. (Refer to procedure 10) (2) Loosen the clamp of the drain pump. (See Photo 15) Do not hold this floating part (3) Remove the float switch (tapping screw 4×10: 1 screw/1 when lifting;...

  • Page 42: Remote Controller

    REMOTE CONTROLLER 13-1. 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 43 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 44 Menu structure Main menu Press the button. Move the cursor to the desired item with the buttons, and press the button. Operation Vane · 3D i-See · Vent. (Lossnay) High power Comfort Manual vane angle 3D i-See sensor Vertical air direction Horizontal air direction Timer menu Timer...
  • Page 45 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 Collect model names and serial No. Model name input Serial No.
  • Page 46 Main menu list Main Setting and display items Setting details menu Operation Vane · 3D i-See · Vent. Vane: Use to set the vertical air direction. (Vane.Vent. (Lossnay)) Louver: Use to set the horizontal air direction. 3D i-See sensor: This setting is available only for the air conditioners that support easy setting function of motion sensing air direction.
  • Page 47 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 48 <PAR-SL97A-E> Controller interface Transmission area Transmission indicator Remote controller display Timer indicator *For explanation purposes, all of the items that appear in the display are shown. *All items are displayed when the Reset button is pressed. Operation areas ON/OFF button Temperature setting buttons Fan Speed button (Changes fan speed) Timer Off button...
  • Page 49 <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/ i-see button* down airflow direction) Timer ON button Menu button Timer OFF button SET/SEND button Weekly timer ON/OFF button* CANCEL button...
  • Page 50 13-2. 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, date and time of occur- Error information rence, model name, and serial number will appear. Error code The model name and serial number will appear only if the informa- Error unit...
  • Page 51 • 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: Cursor...
  • Page 52 13-3. SERVICE MENU Maintenance password is required 1. Select ˝Service˝ from the Main menu, and press the [ ] button. Main Main menu *At the main display, the menu button and select ˝Service˝ to make Service the maintenance setting. 2. When the Service menu is selected, a window will appear asking for the pass- Service menu word.
  • Page 53 13-4. TEST RUN 13-4-1. PAR-41MAA 1. Select ˝Service˝ from the Main menu, and press the [ ] button. Test run Input maintenance info. Settings Check Select ˝Test run˝ with the F1 or F2 button, and press the [ ] button. Others 2.
  • Page 54 13-4-2. PAR-SL97A-E Measure an impedance between the power supply terminal block on the outdoor unit and ground with a 500 V Megger and check that it is equal to or greater than 1.0 MΩ. TEST RUN 1. Turn on the main power to the unit. TEST RUN 2.
  • Page 55 13-5. FUNCTION SETTING 13-5-1. PAR-41MAA Settings menu 1. Select ˝Service˝ from the Main menu, and press the [ ] button. Function setting Rotation setting Select ˝Setting˝ from the Service menu, and press the [ ] button. Service menu: Select ˝Function setting˝, and press the [ ] button.
  • Page 56 Pattern 2 Function setting Ref. address 4. Toggle through the pages with the F3 or F4 button. Grp. (1/8) Mode 1 Mode 2 Mode 3 5. Select the mode number with the F1 or F2 button, and then press the [ Mode 4 button.
  • Page 57 13-5-2. PAR-SL97A-E Functions can be selected with the wireless remote controller. Function selection using wireless remote controller is available only for refriger- ant system with wireless function. Refrigerant address cannot be specified by the wireless remote controller. [Flow of function selection procedure] The flow of the function selection procedure is shown below.
  • Page 58 13-5-3. 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. 1) Press the button to set the ˝50˝. Direct the wireless remote controller toward the receiver of the indoor unit and press the button.
  • Page 59 13-6. ROTATION SETTING Setting method of each function by wired remote controller Settings menu Function setting ■ PAR-41MAA Rotation setting 1. Stop operation Service menu: Select "Service" from the Main menu, and press the [ ] button. Cursor Select "Settings" with the F1 or F2 button, and press the [ ] button.
  • Page 60 13-7. ERROR HISTORY 1. Select ˝Service˝ from the Main menu, and press the [ ] button. Test run Input maintenance info. Settings Check Others Select ˝Check˝ with the F1 or F2 button, and press the [ button. Select ˝Error history˝ with the F1 or F2 button, and press the [ ] button.
  • Page 61 5. Preliminary error history Preliminary error hist. Select "Preliminary error hist." from the Error history menu, and press Error Unt# dd/mm/yy the [ ] button. 32 preliminary error history records will appear. Error history menu: Page Delete 4 records are shown per page, and the top record on the first page indi- cates the latest error record.
  • Page 62 13-8. SELF-DIAGNOSIS 13-8-1. PAR-41MAA 1. Select ˝Service˝ from the Main menu, and press the [ ] button. Diagnosis Self check Select ˝Check˝ from the Service menu, Remote controller check and press the [ ] button. Service menu: Select ˝Diagnosis˝ from the Check menu, Cursor and press the [ ] button.
  • Page 63 13-8-2. PAR-SL97A-E When a malfunction occurs to air conditioner, both indoor unit and outdoor unit will stop and operation lamp blinks to inform unusual stop. < Malfunction-diagnosis method at maintenance service> Refrigerant [Procedure] address display 1. Press the CHECK button twice. CHECK •...
  • Page 64 13-9. 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, Diagnosis and press the [ ] button. Self check Remote controller check Select ˝Check˝ from the Service menu, and press the [ ] button.
  • Page 65 13-10. SMOOTH MAINTENANCE 1. Select ˝Service˝ from the Main menu, and press the [ ] button. Check menu Error history Diagnosis Smooth maintenance Request code Select ˝Check˝ with the F1 or F2 button, and press the [ ] button. Service menu: Cursor Select ˝Smooth maintenance˝...
  • Page 66 ■ Refrigerant address Single refrigerant system Multi refrigerant system (group control) In the case of single refrigerant system, the refrigerant address Up to 16 refrigerant systems (16 outdoor units) can be con- is ˝00˝ and no operation is required. nected as a group by 1 remote controller. To check or set the Simultaneous twin, triple units belong to this category refrigerant addresses.
  • Page 67 OCH784...
  • Page 68 HEAD OFFICE: TOKYO BUILDING, 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN CCopyright 2021 MITSUBISHI ELECTRIC CORPORATION Published: Oct. 2021 No. OCH784 Specifications are subject to change without notice. Made in Japan...

This manual is also suitable for:

Pla seriesPla-sm100ea2Pla-sm125ea2Pla-sm140ea2Pla-sm71ea2.ukPla-sm100ea2.uk ... Show all

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