User manual TOSHIBA MM-SB028 SERVICE MANUAL

[. . . ] A90-0132 Modular Multi System Service Manual Air Conditioner - Multi Split Type System HFC R407C 2 Contents Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Outline of MMS (Modular Multi System) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Parts Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] Yes No Cooling bypass PMV B error Are the resistance characteristics of TD2 sensor normal ?Yes No Replace TD2 sensor. Is the wiring correct ?Yes No Set normal wiring. (Check miswiring of the outdoor unit according to miswiring check function. ) Insufficient refrigerant, blockage, pipe breakage. 14 103 Troubleshooting Diagnostic procedure for check code Check code [bd] Mg-SW protective operation Operation cause 1. Mg-SW contact deposit protective operation TD sensor error Pd sensor/Ps sensor error Insufficient refrigerant, blockage in pipe. Yes Is the Mg-SW contact faulty ?No Turn off the power supply, and replace Mg-SW. Are the resistance value characteristics of TD sensor normal ?Yes No Sensor error Are the output voltage characteristics of Pd sensor/Ps sensor normal ?Yes No Sensor error Insufficient refrigerant, blockage 14 104 Troubleshooting Diagnostic procedure for check code Check code [bE] Low pressure (Ps) protective operation Operation cause 1. Ps sensor error Service valve closed Indoor fan capacitor error Indoor/outdoor PMV blockage Indoor heat exchanger blockage SV2 circuit Incorrect wiring of communication cable between indoor and outdoor units No Does the indoor fan operate ?Yes Are the following items related to indoor fan motor normal ?Motor Yes No Repair defective part. Check indoor PC board. If defective, replace. Is there a blockage on the indoor filter or heat exchanger ?No Yes Clean or remove blockage. Are the gas pipe and liquid pipe service valves of the outdoor unit fully open ?Yes No Open valves fully. Are the characteristics of low pressure sensor normal ?Yes No Replace low pressure sensor. 14 Is SV2 bypass circuit normal?Is SV2 bypass circuit normal ? Is the wiring correct ?Yes No Set normal wiring. (Check miswiring of the outdoor unit according to miswiring check function. ) Insufficient refrigerant, blockage, pipe breakage. 105 Troubleshooting Diagnostic procedure for check code Check code [d1] Master outdoor unit set-up alarm Operation cause 1. Incorrect set-up of master outdoor unit 3. Defective outdoor interface PC board Are there multiple inverter outdoor units connected ?No Yes Set only one inverter outdoor unit per system. Is set-up of the master outdoor units position duplicated ?[Set SW08 bit 2 on interface PC board of each unit. (*1)] Yes Set only one unit as master, turn off all power source, and then restart the operation. No Check interface PC board. ( *1) Set-up of outdoor unit at center position (SW08 bit 2 set-up on outdoor interface PC board) OFF: Slave/ON: Master (Automatic set-up for inverter outdoor unit). 14 106 Troubleshooting Diagnostic procedure for check code Check code [d2] Slave outdoor unit alarm Operation cause Defective slave outdoor unit An error occurs in the slave outdoor unit. Confirm the check code of the slave unit, and check it according to the diagnostic procedure for each check code. Check code [d3] TH sensor alarm Operation cause Error of temp. sensor incorporated in IGBT (Inverter Gate Bi-Polar Transistor) There is an error with the temp. [. . . ] SENSOR - LIQUID (TC2) SIDE PANEL ASSEMBLY (right) SIDE PANEL ASSEMBLY (left) PLATE H TRANSFORMER (MMS) TERMINAL BLOCK `ABC PQ E' TERMINAL BLOCK `E-L-N' PCB CONTROL (CM**CO2) PCB POWER (P**RC01) PRESSURE SENSOR (Service) PULSE MOTOR VALVE - COIL INFRARED RECEIVER - (AI) UNDER PANEL UNDER PANEL UNDER PANEL - (REMOTE) UNDER PANEL - (REMOTE) UPPER PANEL ASSEMBLY UPPER PANEL ASSEMBLY S056 1 1 SR056 S080 1 1 1 1 SR080 1 1 1 2 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 3 1 3 1 2 2 3 1 3 1 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 15 4 2 1 3 1 15 4 2 1 3 1 19 4 2 1 4 1 1 1 1 1 1 2 2 5 2 2 5 3 3 5 2 1 1 1 1 1 1 1 19 4 2 1 4 1 1 1 31 32 33 34 35 36 37 38 39 40 1 3 3 5 2 41 42 43 44 44 45 1 1 1 1 1 1 1 1 20 22 22 23 23 1 45 46 1 46 166 Exploded views and service parts Indoor units Built-In Slim Duct MM-SB028 9 17 8 7 10 13 11 14 15 5 2 12 4 3 1 6 19 20 16 18 Ref. 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 Description SB028 2 2 2 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 43A50006 TEMPERATURE SENSOR CLIP (TC) 43A20003 MULTI-BLADE FAN 43A22005 S FAN CASE 43A22006 S FAN CASE 43A21020 FAN MOTOR (34W) 43A44063 REFRIGERATION ASSEMBLY 43A50023 TEMP. SENSOR - LIQUID TC2 43155100 MF CAPACITOR 43A58004 TRANSFORMER (MMS) 43A60010 TERMINAL `ABC PQ E' 43A60012 TERMINAL `E L N' 43A69025 PC BOARD - CONTROL (MMS) 43A69024 PC BOARD - POWER (MMS) 43A72011 DRAIN PAN 43A80009 FILTER 43A49010 PRESSURE SENSOR (Service) 43A46037 PULSE MOTOR VALVE - COIL 43A88013 OWNER'S MANUAL 20 167 Exploded views and service parts Indoor units 2-Way Cassette MM-TU028, MM-TU042, MM-TU056 14 20 21 15 13 11/12 19 10 11/12 8 9 1 18 3 16 22 28 28 4 5 23 6 16 2 24 22 23 25 26 5 7 17 27 Ref. 01 02 03 04 05 06 07 08 09 10 12 13 14 15 43A22007 43020288 43A51002 43A70008 43020253 43071019 43A70009 43A60025 43A60012 43A69008 43155100 43A69023 43A69024 43A58007 Description BLOWER BASE ASSEMBLY CROSS FLOW FAN FLOAT SWITCH PUMP ASSEMBLY BEARING DRAIN CONNECTION DRAIN HOSE TERMINAL `ABC PQ E' TERMINAL `E L N' INTERFACE PC BOARD MF CAPACITOR PCB CONTROL (CM**CO1) PCB POWER (P**RC01) TRANSFORMER (MMS) TU028 TU042 TU056 1 2 1 1 2 1 1 1 1 1 2 1 1 1 1 2 1 1 2 1 1 1 1 1 2 1 1 1 1 2 1 1 2 1 1 1 1 1 2 1 1 1 Ref. 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