2.3. Shutdowns and alarms with identification numbers for screw com-
pressors
2.3.1 Shutdowns and alarms for screw compressors
Shutdown/alarm Id
Danbuss Profibus/
Modbus
Low suction pressure alarm + shutdown 5) 31 31
High suction pressure alarm 32 32
Low suction gas superheat alarm + shutdown 33 33
High suction gas superheat alarm + shutdown 34 34
Low discharge pressure shutdown 35 35
High discharge pressure alarm + shutdown 36 36
High discharge temperature alarm + shutdown 37 37
Low oil pressure (differential pres-
sure)
alarm + shutdown 38 38
Low brine/intermed. gas temperature alarm + shutdown 39 39
Low discharge temperature alarm 40 40
Low oil temperature alarm + shutdown 41 41
High oil temperature alarm + shutdown 42 42
High oil filter differential pressure alarm + shutdown 43 43
Oil system error (oil flow switch) shutdown 44 44
Capacity error alarm + shutdown 1) 45 45
Compressor motor overload shutdown 46 46
Compressor motor error/emergency
stop/HP
shutdown 47 47
Oil pump error alarm + shutdown 2) 4) 48 48
High motor temperature (thermistor) shutdown 49 49
PMS error shutdown 55 55
No starting permission alarm 56 56
High brine/intermed. gas temperature alarm + shutdown 58 58
Full flow pump error alarm + shutdown 2) 62 62
Oil rectifier error alarm 64 64
Wrong starting number in sequence alarm 65 65
Low external input signal alarm + shutdown 67 67
High external input signal alarm + shutdown 68 68
Low discharge gas superheat alarm + shutdown 69 69
Discharge pressure overload shutdown 70 70
Evolution, shutdown from PLC shutdown 71 71
Evolution, no communication to PLC shutdown 72 72
Limiter, suction pressure alarm 73 73
Chiller, common shutdown shutdown 80 73
Limiter discharge pressure alarm 74 74
No communication to Chiller shutdown 81 74
Limiter process out (brine) tempera-
ture
alarm 75 75
Cooling fan error shutdown 82 75
Limiter hot water alarm 76 76
VI position error shutdown 83 76
Low lubricating pressure alarm + shutdown 84 77
Liquid slugging shutdown NA 78
Watch the oil pressure alarm 79 79
Alarms and shutdowns
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Engineering manual - Unisab III 1.10
001930 en 2014.09