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SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
SPLIT-TYPE, AIR CONDITIONERS
SERVICE MANUAL
Indoor unit
[Model Name]
PCA-M35KA2
PCA-M50KA2
PCA-M60KA2
PCA-M71KA2
PCA-M100KA2
PCA-M125KA2
PCA-M140KA2
[Service Ref.]
PCA-M35KA2
PCA-M35KA2-ET
PCA-M50KA2
PCA-M60KA2
PCA-M71KA2
PCA-M100KA2
PCA-M125KA2
PCA-M140KA2
INDOOR UNIT
PCA-M35KA2-ET
PCA-M50KA2-ET
PCA-M60KA2-ET
PCA-M71KA2-ET
PCA-M100KA2-ET
PCA-M125KA2-ET
PCA-M140KA2-ET
PCA-M50KA2-ET
PCA-M60KA2-ET
PCA-M71KA2-ET
PCA-M100KA2-ET
PCA-M125KA2-ET
PCA-M140KA2-ET
indication
R32/R410A
PCA-M35KA2-ER
PCA-M50KA2-ER
PCA-M60KA2-ER
PCA-M71KA2-ER
PCA-M100KA2-ER
PCA-M125KA2-ER
PCA-M140KA2-ER
PCA-M35KA2-ER
PCA-M50KA2-ER
PCA-M60KA2-ER
PCA-M71KA2-ER
PCA-M100KA2-ER
PCA-M125KA2-ER
PCA-M140KA2-ER
CONTENTS
1. REFERENCE MANUAL ···························· 2
2. SAFETY PRECAUTION ··························· 3
3. PARTS NAMES AND FUNCTIONS ·········· 8
4. SPECIFICATIONS ···································· 9
5. NOISE CRITERION CURVES ················ 12
6. OUTLINES AND DIMENSIONS ·············· 14
7. WIRING DIAGRAM ································· 18
8. REFRIGERANT SYSTEM DIAGRAM ···· 19
9. TROUBLESHOOTING ···························· 20
10. FUNCTION SETTING ····························· 34
11. SPECIAL FUNCTION ····························· 34
12. DISASSEMBLY PROCEDURE ··············· 36
13. REMOTE CONTROLLER ······················· 42
PARTS CATALOG (OCB752)
September 2021
No. OCH752
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Table of Contents
Related Manuals for Mitsubishi Electric Mr.Slim PCA-M35KA2
Summary of Contents for Mitsubishi Electric Mr.Slim PCA-M35KA2
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Page 1: Table Of Contents
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS SPLIT-TYPE, AIR CONDITIONERS September 2021 No. OCH752 SERVICE MANUAL R32/R410A Indoor unit [Model Name] PCA-M35KA2 PCA-M35KA2-ET PCA-M35KA2-ER PCA-M50KA2 PCA-M50KA2-ET PCA-M50KA2-ER PCA-M60KA2 PCA-M60KA2-ET PCA-M60KA2-ER PCA-M71KA2 PCA-M71KA2-ET PCA-M71KA2-ER PCA-M100KA2 PCA-M100KA2-ET PCA-M100KA2-ER PCA-M125KA2 PCA-M125KA2-ET PCA-M125KA2-ER PCA-M140KA2 PCA-M140KA2-ET PCA-M140KA2-ER [Service Ref.] PCA-M35KA2 PCA-M35KA2-ET... -
Page 2: Reference Manual
REFERENCE MANUAL 1-1. OUTDOOR UNIT’S SERVICE MANUAL Model name Service Ref. Service manual No. MXZ-3E54VA MXZ-3E54VA-E2/ET2/ER2 MXZ-3E68VA MXZ-3E68VA-E2/ET2/ER2 MXZ-4E72VA MXZ-4E72VA-E2/ET2/ER2 OBH723 MXZ-4E83VA MXZ-4E83VA-E4/ET4/ER3 OBB723 MXZ-5E102VA MXZ-5E102VA-E4/ET4/ER3 MXZ-4E83VAHZ MXZ-4E83VAHZ-E3/ER3 MXZ-3F54VF3 MXZ-3F54VF3-E1/ET1 MXZ-3F68VF3 MXZ-3F68VF3-E1/ET1 OBH790 MXZ-4F72VF3 MXZ-4F72VF3-E1/ET1 OBB790 MXZ-4F80VF3 MXZ-4F80VF3-E1/ET1 MXZ-6D122VA2 MXZ-6D122VA2-E1/ET1/ER1 OBH626 OBB626 PAC-MK33/53BC... -
Page 3: Safety Precaution
SAFETY PRECAUTION MEANINGS OF SYMBOLS DISPLAYED ON THE UNIT This mark is for R32 refrigerant only. Refrigerant type is written on nameplate of outdoor unit. WARNING Read the OPERATION MANUAL carefully before operation. Service personnel are required to carefully read the OPERATION MANUAL and INSTALLATION MANUAL before operation. Further information is available in the OPERATION MANUAL, INSTALLATION MANUAL, and the like. - 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 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; • the recovery process is supervised at all times by a competent person; •...
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Page 8: Parts Names And Functions
Unit Electronic weighing scale [5] Service tools Use the below service tools as exclusive tools for R32/R410A refrigerant. Tool name Specifications · Use the existing fitting specifications . (UNF1/2) Gauge manifold · Use high-tension side pressure of 5.3 MPa·G or over. Charge hose ·... -
Page 9: Specifications
SPECIFICATIONS 4-1. SPECIFICATIONS Service Ref. PCA-M35KA2 PCA-M35KA2-ET/ER Mode Cool Heat Power supply (phase, voltage, cycle) Single phase, 230 V, 50 Hz Input 0.04 0.04 Running current 0.29 0.27 External finish Munsell (6.4Y 8.9/0.4) Heat exchanger Plate fin coil Fan Fan (drive) × No. Sirocco fan (direct) ×... - Page 10 Service Ref. PCA-M71KA2 PCA-M71KA2-ET/ER Mode Cool Heat Power supply (phase, voltage, cycle) Single phase, 230 V, 50 Hz Input 0.06 Running current 0.42 External finish Munsell (6.4Y 8.9/0.4) Heat exchanger Plate fin coil Fan Fan (drive) × No. Sirocco fan (direct) × 3 Fan motor output 0.095 Airflow (Low-Medium2-Medium1-High) m...
- Page 11 Service Ref. PCA-M140KA2 PCA-M140KA2-ET/ER Mode Cool Heat Power supply (phase, voltage, cycle) Single phase, 230 V, 50 Hz Input 0.14 Running current 0.90 External finish Munsell (6.4Y 8.9/0.4) Heat exchanger Plate fin coil Fan Fan (drive) × No. Sirocco fan (direct) × 4 Fan motor output 0.160 Airflow (Low-Medium2-Medium1-High) m...
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Page 12: Noise Criterion Curves
NOISE CRITERION CURVES PCA-M35KA2 PCA-M50KA2 SPL(dB) LINE SPL(dB) LINE NOTCH NOTCH PCA-M35KA2-ET/ER High PCA-M50KA2-ET/ER 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 CONTINUOUS... - Page 13 PCA-M100KA2 PCA-M125KA2 NOTCH SPL(dB) LINE NOTCH SPL(dB) LINE PCA-M100KA2-ET/ER PCA-M125KA2-ET/ER 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 CONTINUOUS NOISE NOISE 1000...
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Page 14: Outlines And Dimensions
OUTLINES AND DIMENSIONS PCA-M35KA2 PCA-M35KA2-ET/ER Unit: mm PCA-M50KA2 PCA-M50KA2-ET/ER OCH752... - Page 15 PCA-M60KA2 PCA-M60KA2-ET/ER Unit: mm PCA-M71KA2 PCA-M71KA2-ET/ER OCH752...
- Page 16 PCA-M100KA2 PCA-M100KA2-ET/ER Unit: mm PCA-M125KA2 PCA-M125KA2-ET/ER PCA-M140KA2 PCA-M140KA2-ET/ER OCH752...
- Page 17 Unit: mm WIRED REMOTE CONTROLLER (Option) 14.5 OCH752...
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Page 18: Wiring Diagram
WIRING DIAGRAM [LEGEND] SYMBOL NAME SYMBOL NAME INDOOR CONTROLLER BOARD TERMINAL BLOCK (INDOOR/OUTDOOR CONNECTING LINE) CN2L CONNECTOR (LOSSNAY) TERMINAL BLOCK (REMOTE CONTROLLER TB5,TB6 CN32 CONNECTOR (REMOTE SWITCH) TRANSMISSION LINE) CN41 CONNECTOR (HA TERMINAL-A) ROOM TEMP. THERMISTOR CN51 CONNECTOR (CENTRALLY CONTROL) (0°C / 15kΩ, 25°C / 5. -
Page 19: Refrigerant System Diagram
REFRIGERANT SYSTEM DIAGRAM Strainer Heat exchanger Refrigerant GAS pipe connection (Flare) Condenser/evaporator temperature thermistor (TH5) Refrigerant flow in cooling Refrigerant flow in heating Refrigerant LIQUID pipe connection (Flare) Pipe temperature thermistor/liquid Room temperature (TH2) thermistor (TH1) Strainer Distributor with strainer 1/2 #50/#50 OCH752... -
Page 20: 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 21 • Refer to the following tables for details on the check codes. [Output pattern A] Beeper sounds Beep Beep Beep Beep Beep Beep Beep OPERATION · · · Repeated INDICATOR lamp blink pattern Approx. 2.5 s 0.5 s 0.5 s 0.5 s Approx.
- Page 22 ● If the unit cannot be operated properly after test run, refer to the following table to find the cause. Symptom Cause Wired remote controller LED 1, 2 (PCB in outdoor unit) Please Wait For about 3 After LED 1, 2 are lit, LED 2 is turned •...
- Page 23 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. Please 9-3. SELF-DIAGNOSIS ACTION TABLE refer to the outdoor unit's service manual for the details. Check Code Abnormal point and detection method Cause...
- Page 24 Check Code Abnormal point and detection method Cause Judgment and action Freezing/overheating protection is (Cool or dry mode) (Cool or dry mode) operating Clogged filter (reduced airflow) Check clogs of the filter. Freezing protection (Cool mode) Short cycle of air path Remove blockage.
- Page 25 Check Code Abnormal point and detection method Cause Judgment and action Freezing/overheating protection is working Defective thermistor – Check resistance value of thermistor. For characteristics, refer to (P1). characteristics (1) Freezing protection Check contact failure of connector (CN44) on Contact failure of connector Plate HEX Liquid temperature (TH34) the indoor controller board.
- Page 26 Check Code Abnormal point and detection method Cause Judgment and action Indoor/outdoor unit communication Check LED display on the outdoor control circuit board. (Connect A-control service error (Signal receiving error) tool, PAC-SK52ST.) Refer to outdoor unit ser- Abnormal if indoor controller board can- vice manual.
- Page 27 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. Power supply of rated voltage is not supplied to out- Check the voltage of outdoor power door unit.
- Page 28 Note: Refer to the outdoor unit's service manual for the detail of remote controller. Phenomena Cause Countermeasure (2) LED2 on indoor controller board • When LED1 on indoor controller board is also blinking. Check indoor/outdoor unit connecting wire is blinking. Connection failure of indoor/outdoor unit connecting for connection failure.
- Page 29 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 controller malfunctions, the emergency operation can be done using the emergency buttons on the grille.
- Page 30 9-6. HOW TO CHECK THE PARTS Parts name Checkpoints Room temperature Disconnect the connector then measure the resistance with a multimeter. thermistor (TH1) Pipe temperature thermistor/liquid(TH2) Refer to “9-6-1. Thermistor”. Condenser/evaporator temperature thermistor (TH5) Vane motor (MV) Measure the resistance between the terminals with a multimeter. (At the ambient temperature of 20 to 30°C Connector Normal...
- Page 31 9-6-2. DC Fan motor (fan motor/indoor controller circuit board) Check method of DC fan motor (fan motor/indoor controller circuit board) 1 Notes · High voltage is applied to the connector (CNMF) for the fan motor. Pay attention to the service. ·...
- Page 32 9-7. TEST POINT DIAGRAM Indoor controller board LED3 Transmission (Indoor/outdoor) Vane motor output (MV) 12 V pulse output CN90 Connect to the wireless remote Model selection controller board (CNB) Capacity setting Jumper wire J41,J42 Pair No. setting for wireless Emergency operation remote controller CN105 CN51...
- Page 33 9-8. FUNCTIONS OF DIP SWITCH AND JUMPER WIRE Each function is controlled by the DIP switch and the jumper wire on the indoor controller board. SW1 and SW2 are equipped only for service parts. Model setting and capacity setting are preset in the nonvolatile memory of the controller board of the unit. ■...
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Page 34: 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 35 Operation pattern Fig. 1 Refrigerant address Refrigerant address Refrigerant address "00" "01" "02" 1 [Back-up function only] Error occurs on main unit. Start operation Main OC-1 OC-2 OC-3 Main unit Abnormal condition Main IC-1 3(2) 3(2) 3(2) unit unit unit IC-2 IC-3 IC-1...
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Page 36: Disassembly Procedure
DISASSEMBLY PROCEDURE (Photo: PCA-M125KA2) : Indicates the visible parts in the photos/figures. Be careful when removing heavy parts. OPERATING PROCEDURE PHOTOS/FIGURES 1. Removing the air intake grille Figure 1 (1) Slide the air intake grille holding knobs (at 2 or 3 loca- tions) to the rear to open the air intake grille. - Page 37 OPERATING PROCEDURE PHOTOS/FIGURES 3. Removing the room temperature thermistor (TH1) Photo 4 (1) Remove the air intake grille. (See Figure 1, 2) (2) Remove the beam by removing screws. (See Photo 1) Casing (3) Remove 2 screws from the electrical cover, and remove the electrical cover.
- Page 38 OPERATING PROCEDURE PHOTOS/FIGURES 5. Removing the fan (3 connection) Photo 9 (1) Remove the air intake grille. (See Figure 1, 2) Beam Fan guard (2) Remove the beam by removing screws. (See Photo 1) (3) Remove 2 screws from the electrical cover, and remove the electrical cover.
- Page 39 OPERATING PROCEDURE PHOTOS/FIGURES 7. Removing the vane motor Photo 13 (1) Remove the air intake. (See Figure 1, 2) (2) Remove the right side panel. (See Figure 3, 4) Connector Vane motor and cover (3) Remove the connector of vane motor. (4) Remove 2 screws of vane motor cover , then remove vane motor.
- Page 40 OPERATING PROCEDURE PHOTOS/FIGURES 10. Removing the pipe temperature thermistors/liquid (TH2) Photo 18 and condenser/evaporator temperature thermistor (TH5) (1) Remove the air intake grille. (See Figure 1, 2) (2) Remove the left and right side panels. (See Figure 3,4) (3) Remove the under panel. (See Photo 14) (4) Remove the drain pan.
- Page 41 OPERATING PROCEDURE PHOTOS/FIGURES Photo 22 13. Removing the heat exchanger (1) Remove the air intake grille. (See Figure 1, 2) (2) Remove the beam. (See Photo 1) (3) Remove the electrical cover. (See Photo 1) (4) Pull the electrical box downward. (See Photo 2) (5) Remove the left and right side panels.
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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...
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Page 45: Model Name
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 the maintenance setting. Service 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 [ Others ] button. 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 Grp. (1/8) 4. Toggle through the pages with the F3 or F4 button. Mode 1 Mode 2 Mode 3 5. Select the mode number with the F1 or F2 button, and then press the [ Mode 4 Save: 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] 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 ■ PAR-41MAA Settings menu Stop operation Function setting Rotation setting Select "Service" from the Main menu, and press the [ ] button. Service menu: 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. Error Unt# dd/mm/yy Select "Preliminary error hist." from the Error history menu, and press 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 indicates 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 OCH752...
- Page 68 HEAD OFFICE: TOKYO BUILDING, 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN Copyright 2021 MITSUBISHI ELECTRIC CORPORATION Published: Sep. 2021 No. OCH752 Made in Japan Specifications are subject to change without notice.