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OCH706

COMBINATION OF INDOOR AND OUTDOOR UNITS

INDOOR UNIT SERVICE MANUAL

Model Name

Service Ref.

Service Manual No.

PLA-SM71EA

PLA-SM71EA.UK

OCH683

OCB683

PEAD-SM71JA(L)

PEAD-SM71JA(L) .UK

HWE17010

BWE017160

2-1. ALWAYS OBSERVE FOR SAFETY

Before obtaining access to terminal, all supply circuits must be disconnected.

SAFETY PRECAUTION

MEANINGS OF SYMBOLS DISPLAYED ON THE UNIT

WARNING

This mark is for R32 refrigerant only. Refrigerant type is written on nameplate of outdoor unit.

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.

Содержание Mr.Slim SUZ-SM71VA.TH

Страница 1: ...CIFICATION 10 5 NOISE CRITERIA CURVES 11 6 OUTLINES AND DIMENSIONS 12 7 WIRING DIAGRAM 13 8 REFRIGERANT SYSTEM DIAGRAM 14 9 ACTUATOR CONTROL 15 10 SERVICE FUNCTIONS 16 11 TROUBLESHOOTING 16 12 DISASSE...

Страница 2: ...rminal all supply circuits must be disconnected 2 SAFETY PRECAUTION MEANINGS OF SYMBOLS DISPLAYED ON THE UNIT WARNING This mark is for R32 refrigerant only Refrigerant type is written on nameplate of...

Страница 3: ...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 mechan...

Страница 4: ...ous gases will be released 9 Do not use low temperature solder alloy in case of brazing the refrigerant pipes 10 When performing brazing work be sure to ventilate the room sufficiently Make sure that...

Страница 5: ...e Refrigeration Equipment Where electrical components are being changed they shall be fit for the purpose and to the correct specification At all times the manufacturer s maintenance and service guide...

Страница 6: ...procedures shall be used However for flammable refrigerants it is important that best practice is followed since flammability is a considera tion The following procedure shall be adhered to remove ref...

Страница 7: ...o cylinders ensure that only appropriate refrig erant recovery cylinders are employed Ensure that the correct number of cylinders for holding the total system charge are available All cylinders to be...

Страница 8: ...ur sides is open and in a sufficiently large space with out depressions 2 4 Minimum installation area If you unavoidably install a unit in a space where all four sides are blocked or there are depress...

Страница 9: ...er to the spec nameplate or installation manual For the amount to be added locally refer to the installation manual Install the indoor unit so that the height from the floor to the bottom of the indoo...

Страница 10: ...3 Refrigeration oil Model L 0 4 FW68S Fan motor Model RC0J60 BC Current Cooling A 0 83 Heating 0 82 Dimensions W H D mm 840 880 330 Weight kg 55 Special remarks Air flow Cooling High m h 3 426 Med 3 0...

Страница 11: ...30 20 10 63 125 250 500 1000 2000 4000 8000 NC 60 NC 50 NC 40 NC 30 NC 20 NC 70 BAND CENTER FREQUENCIES Hz NC 10 Model Item SUZ SM71VA TH Smoothing capacitor C61 C62 C63 CB1 2 3 560 F 450 V Diode modu...

Страница 12: ...efrigerant pipe joint Refrigerant pipe flared 9 52 Gas refrigerant pipe joint Refrigerant pipe flared 15 88 350 mm or more 100 mm or more REQUIRED SPACE Basically leave this space open Only if front a...

Страница 13: ...13 OCH706 7 WIRING DIAGRAM SUZ SM71VA TH...

Страница 14: ...RT68 Ambient temperature thermistor RT65 Strainer 100 Strainer 50 Strainer 100 Muffler Capillary tube 3 0 2 0 200 6 Distributer ADDITIONAL REFRIGERANT CHARGE R32 g MAX REFRIGERANT PIPING LENGTH Max Le...

Страница 15: ...e fan motor turns OFF 15 seconds after the compressor has stopped running NOTE The 4 way valve reverses for 5 seconds right before start up of the compressor Sensor Purpose Actuator Compressor LEV Out...

Страница 16: ...ABLE and 11 3 HOW TO PROCEED SELF DIAGNOSIS 11 1 CAUTIONS ON TROUBLESHOOTING 1 Before troubleshooting check the following items 1 Check the power supply voltage 2 Check the indoor outdoor connecting w...

Страница 17: ...lly Refer to 11 5 How to check in verter compressor 13 time blink 2 5 seconds OFF DC voltage DC voltage of inverter cannot be detected normally Refer to 11 5 How to check in verter compressor Outdoor...

Страница 18: ...e will appear will appear if no error history is available 4 Resetting the error history Press the F4 button Reset on the screen that shows the error history A confirmation screen will appear asking i...

Страница 19: ...ear on the remote controller display if the correct voltage 8 5 12 V DC is not supplied to the remote control ler If this is the case check the remote controller wiring and indoor units OK No problems...

Страница 20: ...er to the indoor unit installation Check code 4 digits or check code 2 digits Error detection attribute Address 3 digits or unit address No 2 digits When there is no error history When opposite side d...

Страница 21: ...mal Remote controller switching is necessary When the problem is other than the checked remote controller Error display 2 E3 6833 6832 blink Cannot send Error display 3 ERC and data error count are di...

Страница 22: ...sensor emits an intermittent buzzer sound the operation light blinks and the check code is output It takes 3 seconds at most for check code to appear 4 Point the remote controller at the sensor on th...

Страница 23: ...tected by unit other than indoor unit outdoor unit etc Symptom 1 Indoor outdoor unit communication error 2 Transmitting error Outdoor unit 3 Open short of outdoor unit thermistors UP U3 U4 14 12 14 Fb...

Страница 24: ...ture thermistor RT62 Measure the resistance with a tester Before measurement hold the thermistor with your hands to warm it up Refer to 11 6 TEST POINT DIAGRAM AND VOLTAGE for the chart of thermistor...

Страница 25: ...rt the test run and then select the cooling mode For details or for other information about starting the test run when using remote controllers refer to the installation manual for the indoor unit or...

Страница 26: ...od Start heating or cooling test run TEST RUN OPERATION Refer to 11 5 Measurement Measure the time from the start of compressor to the stop of compressor due to overcurrent Is the resistance of thermi...

Страница 27: ...isconnect connector between the compressor and the intelligent power module Turn ON the power supply and start heating test run TEST RUN OPERATION Refer to 11 5 Disconnect connector between the compre...

Страница 28: ...ith a hand Yes Check the outdoor fan motor Refer to Is the fuse F901 blown on the in verter P C board Check the connection of the connectors CN931 CN932 of the outdoor fan mo tor If the connection is...

Страница 29: ...or the installation condition combination of specific conditions such as antennas or wiring Check the following before asking for service 1 Devices affected by the electromagnetic noise TV sets radios...

Страница 30: ...Yes The refrigerant gas amount may be 60 or less than the normal amount Identify where the gas is leaking from and fix the leak No CAUTION Do not start the operation again to prevent hazards The opera...

Страница 31: ...stance k Resistance k Resistance k 11 6 TEST POINT DIAGRAM AND VOLTAGE Inverter P C board SUZ SM71VA TH Fin temperature thermistor RT64 CN673 Ambient temperature thermistor RT65 CN672 Discharge temper...

Страница 32: ...A TH Indicates the visible parts in the photos figures Indicates the invisible parts in the photos figures NOTE Turn OFF the power supply before disassembly OPERATING PROCEDURE PHOTOS FIGURES 1 Removi...

Страница 33: ...res and the lead wires of the inverter P C board 5 Remove the screws of the P B support 6 Remove the P B support from the relay panel 7 Remove the screws of the inverter P C board 8 Remove the inverte...

Страница 34: ...ead wire to the reactor and the following connectors Inverter P C board CN671 Defrost thermistor discharge temperature thermis tor and outdoor heat exchanger temperature ther mistor CN672 Ambient temp...

Страница 35: ...Refer to 1 2 Remove the back panel Refer to 1 3 Remove the screws fixing the relay panel 4 Remove the relay panel 5 Remove the inverter assembly Refer to 2 6 Recover gas from the refrigerant circuit...

Страница 36: ...ICE TOKYO BUILDING 2 7 3 MARUNOUCHI CHIYODA KU TOKYO100 8310 JAPAN Copyright 2018 MITSUBISHI ELECTRIC CORPORATION Published Dec 2018 No OCH706 Made in Japan Specifications are subject to change withou...

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