SERVICE MANUAL - BVT Partners OÃ

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CONTENTS1. OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER ............... 51.1 SRK,SRF and SRR series ..................................................................... 5(1) Operation control function by remote controller(2) Unit ON/OFF button .............................................................................. 9(3) Auto restart function .............................................................................. 9(4) Custom cord switching procedure(5) Selection of the annual cooling function(6) High power operation ............................................................................ 11(7) Econo operation .................................................................................... 12(8) Flap and louver control (SRK and SRF series only) .............................. 12(9) Air outlet selection (SRF series only) .................................................... 15(10) 3D auto operation (SRK series only) .................................................... 15(11) Timer operation ..................................................................................... 16(12) Installation location setting (SRK series only) ....................................... 17(13) Determining the operating mode(14) Drain motor (DM) control (SRR series only) ......................................... 181.2 FDTC, FDEN and FDUM series ............................................................. 19(1) Remote controller (Optional parts)(2) Operation control function by the wired remote controller .................... 22(3) Operation control function by the indoor controller1.3 Outline of heating operation ................................................................ 34(1) Summary ............................................................................................... 34(2) Operation of major functional components in heating mode ................. 34(3) Hot keep operation ................................................................................ 34(4) Defrosting operation .............................................................................. 351.4 Outline of cooling operation ................................................................ 36(1) Summary ............................................................................................... 36(2) Operation of major functional components in cooling mode ................. 361.5 Outline of automatic operation ............................................................ 37(1) Determination of operation mode1.6 Operation permission/prohibition control .......................................... 38(1) The operation mode is switched over between Permission and Prohibitionby releasing the jumper wire (J3) on the indoor PCB(3) In the case of CnT input OFF (Operation prohibition)'11 • SCM-SM-110.................................... 5......................................................... 10................................................ 11.......................................................... 17........................................................ 19............................... 23.......................................................... 37............................... 38........................... 38(2) In the case of CnT input ON (Operation permission) ............................ 38
1.7 External control (remote display) /control of input signal ................ 39(1) External control (remote display) output ............................................... 39(2) Control of input signal ........................................................................... 391.8 Protective control function .................................................................. 40(1) Frost prevention control ........................................................................ 40(2) Cooling overload protective control ...................................................... 40(3) Cooling high pressure control(4) Cooling low outdoor temperature protective control(5) Heating high pressure control ............................................................... 42(6) Heating overload protective control ...................................................... 43(7) Heating low outdoor temperature protective control(8) Freezing cycle system protective control .............................................. 44(9) Crankcase heater ................................................................................. 44(10) Inching prevention ................................................................................ 44(11) Compressor overheat protection .......................................................... 44(12) Current safe .......................................................................................... 45(13) Current cut ............................................................................................ 46(14) Outdoor unit failure ............................................................................... 46(15) Indoor fan motor protection ................................................................... 46(16) Discharge pipe sensor disconnection protection control ....................... 46(17) Regulation of outdoor air flow ............................................................... 46(18) Serial signal transmission error protection ............................................ 47(19) Rotor lock .............................................................................................. 47(20) Outdoor fan motor protection ................................................................ 47(21) Outdoor fan control at low outdoor temperature(22) Outdoor unit fan control at overload ...................................................... 48(23) Anomalous power transistor ................................................................. 49(24) Power transistor overheat protection .................................................... 49'11 • SCM-SM-110............................................................... 40............................. 41............................. 43................................... 47.......... 50........................ 51(25) Control of the flowing noise of refrigerant during cooling operation ...... 492. MAINTENANCE DATA ................................................................................ 502.1 SRK,SRF and SRR series ..................................................................... 50(1) Cautions ................................................................................................ 50(2) Items to check before troubleshooting .................................................. 50(3) Troubleshooting procedure (If the air conditioner does not run at all)(4) Troubleshooting procedure (If the air conditioner runs)(5) Self-diagnosis table .............................................................................. 52(6) Service mode (Trouble mode access function) ..................................... 54(7) Inspection procedures corresponding to detail of trouble ..................... 64
Page 1: Manual No.'11•SCM-SM-110updated N
Page 5 and 6: 7. COMPONENT REPLACEMENT ..........
Page 7 and 8: Model SRK71ZK-SRemote controllerOpe
Page 9 and 10: (c) SRR seriesRemote controllerOper
Page 11 and 12: '11 • SCM-SM-110• Model SRK20,
Page 13 and 14: (7) Econo operation(a)(b)(c)(d)Pres
Page 15: '11 • SCM-SM-110(e) Multi-directi
Page 20 and 21: 1.2 FDTC, FDEN and FDUM series(1) R
Page 22: (b)Wireless remote controllerIndica
Page 25 and 26: (d)(e)(f)'11 • SCM-SM-110Timer op
Page 27 and 28: (i)(j)'11 • SCM-SM-1102) When the
Page 29 and 30: (m) Drain motor (DM) control [Appli
Page 31 and 32: (s)(t)'11 • SCM-SM-110SW2 : For s
Page 33 and 34: '11 • SCM-SM-1102) Remote operati
Page 35 and 36: '11 • SCM-SM-1101.3 Outline of he
Page 37 and 38: '11 • SCM-SM-1101.4 Outline of co
Page 39 and 40: '11 • SCM-SM-110 Signals of wirel
Page 41 and 42: 1.8Protective control function'11
Page 43 and 44: '11 • SCM-SM-110(5) Heating high
Page 45 and 46: '11 • SCM-SM-110(8) Freezing cycl
Page 47 and 48: '11 • SCM-SM-110(13) Current cut(
Page 49 and 50: '11 • SCM-SM-110High pressure sen
Page 51 and 52: '11 • SCM-SM-1102 MAINTENANCE DAT
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(5) Self-diagnosis table(i) SCM40,
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'11 • SCM-SM-110(6) Service mode
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(Example)OperationswitchingCooling2
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(ii) SCM100,125Number of flashes wh
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- - '09•SRK-DB-087D'11 • SCM-SM
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- 62 - '09•SRK-DB-087D'11 • SCM
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(7) Inspection procedures correspon
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Over heat of compressor64)mainError
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'11 • SCM-SM-110Defective compres
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'11 • SCM-SM-110(C) Power transis
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CAUTION- HIGH VOLTAGEHigh voltage i
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CAUTION- HIGH VOLTAGEHigh voltage i
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'11 • SCM-SM-110(a)Inspection of
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(ii) Outdoor unit(a) Model SCM40, 4
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'11 • SCM-SM-110(iv) Display sequ
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(i) FDTC series• Control PCBRepla
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(ii) FDEN seriesSet to an appropria
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'11 • SCM-SM-110• Power PCBPSB0
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'11 • SCM-SM-110(4) Check of anom
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2.2.2 Troubleshooting flow(1) List
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'11 • SCM-SM-110Error codeLED Gre
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FUSE250V 15ATB1 250V 20ABK BKLR INP
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t°t°t°t°t°- 140 -RWC000Z247POW
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DISPLAYWIRELESS RECEIVERBACK-UP SWT
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LM2M M MMCNYDSCNSLM15 5CNXCNFUSMI5C
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DISPLAYWIRELESS RECEIVERBACK-UP SWA
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DMM1RDRDWHWH5F250V0.16ACNSCNWCNYRDU
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PConnecting line betweenindoor unit
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Gas lineIndoor unit(φ9.52)(φ9.52)
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Outdoor UnitCooling cycleHeating cy
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Gas lineLiquid line*1(φ9.52 or φ1
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5ANEREDe units.readblesition.rm.nno
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lethatof ailarlue.'11 • SCM-SM-11
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6CNEREDe units.readblesition.rm.nno
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'11 • SCM-SM-1107BEWARE OF WRONG
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'11 • SCM-SM-110
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'11 • SCM-SM-110
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eadableCNERSEDe units.sition.rmm.nn
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TerminalcoverScrewnit F2 33nit Folp
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BEFORE INSTALLATION Before installa
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ELECTRICAL WIRING WORKPreparation o
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seriously affect the user’s healt
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illustration, hold the panel at bot
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illustration, hold the panel at bot
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BEFORE INSTALLATIONBefore installat
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Concealed installationInstall the i
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30Hang301236Drain hose135 78 Liquid
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81 1 Before installation• Install
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drainithinP-20n site)P-20re on site
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'11 • SCM-SM-110Note : This funct
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'11 • SCM-SM-110Before installati
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Interconnecting wiringEarthSignal c
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.e..○This model is middle static
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oleh thethethelation.rmfulg into, d
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'11 • SCM-SM-110(7) Replacement p
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NO. Functions SRK SRR SRF Outline o
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Fan and fan motor (FMo1)7. Detach t
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Compressor (CM)7. Remove the top co
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Main PCB (upper layer)1. Loosen the
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Main PCB (upper layer)Layout of Mai
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Sub PCB (Lower layer)6. Loosen 4 sc
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4-way valve coil1. Disconnect the c
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Fan and fan motor (FMo1)7. Loosen 4
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Compressor (CM)9. Remove the contro
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Compressor (CM)13. Loosen 3 nuts of
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Sub PCB (PWB4) on the 1st layer2. D
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'11 • SCM-SM-110Noise filter PCB
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8 CHECKING PROCEDURE8.1 Models SCM7
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Suction pipetemp. sensor(Tho-S)Outd
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'11 • SCM-SM-110S-1 (WH) C-1 (RD)
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NameResistance 0.293Ω34Discharge p
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'11 • SCM-SM-110P2 N2(RD) (BL) CN
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'11 • SCM-SM-110INVERTER MULTI-SP
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