Samsung AM072BXV Series Service Manual page 3

Contents
4. Troubleshooting .................................................................................................................. 63
4-1 Check-up Window Description .................................................................................................................63
4-2 Service Operation .......................................................................................................................................64
4-2-1 Special Operation .......................................................................................................................................................................................64
4-2-2 DVM S Models EEPROM Code Table ...................................................................................................................................................71
4-2-3 Number Display Method (Outdoor Unit, MCU, Cable remote control, wall-mount, etc.) .........................72
4-3 Appropriate Measures for Different Symptom ...................................................................................... 78
4-3-1 Outdoor Unit Test Operation Flow......................................................................................................................................................78
4-3-2 Main PBA has no power phenomenon .............................................................................................................................................81
4-3-3 Communication Error between Indoor and Outdoor Units during Tracking .........................................82
4-3-4 Communication Error between Indoor and Outdoor Units after Tracking.............................................84
4-3-5 Communication error between main and sub Unit of outdoor unit or between outdoor units ....85
4-3-6 Internal Communication error of the Outdoor Unit C-Box ...............................................................................86
4-3-7 Internal PBA Communication error of the Outdoor Unit C-Box ......................................................................87
4-3-8 MCU branch part setup error - inconsecutive connection with the use of 2 branch parts...............88
4-3-9 MCU branch part setup error - Repeated setup for the same address over 3 times ............................89
4-3-10 MCU branch part setup error - non-installed address setup ........................................................................90
4-3-11 Setup Error for MCU Branch part - Setup Error for MCU Quantity Used ..................................................91
4-3-12 MCU branch part setup error - Overlapping Indoor unit Address setup .................................................92
4-3-13 MCU branch part setup error - Set as being used without connection to an Indoor unit .............93
4-3-14 MCU branch part setup error - Connect an Indoor unit to a branch part not being used ..............94
4-3-15 MCU branch part setup error - Connect more Indoor units than what is actually set up in MCU 95
4-3-16 /
4-3-17 Outdoor Temperature Sensor Error ..........................................................................................................................97
4-3-18 Cond Out Temperature Sensor Error (Open/Short) ...........................................................................................98
4-3-19 Outdoor Cond Out sensor breakaway error ..........................................................................................................99
4-3-20 /
Top 1/2 Temperature sensor error ..................................................................................................................................................101
4-3-21 /
Top temperature sensor breakaway error ................................................................................................................................. 102
4-3-22 : Suction Temperature sensor breakaway error .................................................................................................. 103
4-3-23 High Pressure sensor error (Open/Short) ............................................................................................................ 104
4-3-24 Low Pressure sensor error (Open/Short) ............................................................................................................. 105
4-3-25 Suction Temperature sensor error (Open/Short) ............................................................................................. 106
4-3-26 Liquid Pipe Temperature sensor error (Open/Short) ..................................................................................... 107
4-3-27 EVI In Temperature sensor error (Open/Short) ................................................................................................. 108
4-3-28 EVI Out Temperature sensor error (Open/Short) ............................................................................................. 109
4-3-29 Suction-2 Temperature Sensor Error (OPEN/SHORT) .......................................................................................110
4-3-30 Measures of other outdoor unit error ....................................................................................................................111
4-3-31 : Comp. Down due to High Pressure Protection Control ...............................................................................112
4-3-32 : Suspension of starting due to Compressor discharge temperature sensor /
Top temperature sensor ............................................................................................................................................................................... 113
4-3-33 3-phase Input Wiring error .........................................................................................................................................114
4-3-34 : Suspension of starting by abnormal compression ratio ..............................................................................115
4-3-35 EVI EEV Open error ............................................................................................................................................................116
4-3-36 /
4-3-37 /
4-3-38 Prevention of heating refrigerant charge due to outdoor temperature ................................................119
MCU/MCU subcooler entrance/exit sensor error (Open/Short) ............................................96
/ / Compressor Discharge or
/ / Compressor Discharge or
Refrigerant leakage error ....................................................................................................................117
Prevention of heating / cooling operation due to outdoor temperature ......................118