Air and Water cooled inverter chillers and heat pumpD-EOMZC00105-17ENOperation Manual6/84EWAD TZ - EWAD TZ B -EWWD VZAir and Water cooled inverter chillers andheat pump6.5.7 Low Discharge Superheat fault ................................................................................................................... 706.5.8 Oil Pressure Sensor fault ............................................................................................................................ 706.5.9 Suction Temperature Sensor fault .............................................................................................................. 716.6 Circuit Rapid Stop Alarms ................................................................................................................... 716.6.1 Compressor Extension Communication Error (W/C units only) .................................................................. 716.6.2 EXV Driver Extension Communication Error (W/C units only) .................................................................... 716.6.3 Compressor VFD Fault ............................................................................................................................... 726.6.4 Compressor VFD OverTemp (A/C units only) ............................................................................................. 726.6.5 Condensing Pressure sensor fault .............................................................................................................. 726.6.6 Economizer EXV Driver Error (A/C unit only).............................................................................................. 736.6.7 Economizer EXV Motor Not Connected (A/C unit only) .............................................................................. 736.6.8 Evaporating Pressure sensor fault .............................................................................................................. 736.6.9 EXV Driver Error (A/C units only)................................................................................................................ 746.6.10 EXV Motor Not Connected (TZ B units only) .............................................................................................. 746.6.11 Fail Start Low Pressure .............................................................................................................................. 746.6.12 Fan VFD Over Current (A/C units only) ...................................................................................................... 756.6.13 High Discharge Temperature Alarm ........................................................................................................... 756.6.14 High Motor Current Alarm ........................................................................................................................... 756.6.15 High Motor Temperature Alarm .................................................................................................................. 766.6.16 High Oil Pressure Differential Alarm ........................................................................................................... 766.6.17 High Pressure alarm ................................................................................................................................... 766.6.18 Low Pressure alarm .................................................................................................................................... 776.6.19 Low Pressure Ratio Alarm .......................................................................................................................... 786.6.20 Maximum Number of Restart Alarm (A/C units only) .................................................................................. 786.6.21 Mechanical High Pressure Alarm................................................................................................................ 796.6.22 Mechanical Low Pressure Alarm (W/C units only) ...................................................................................... 796.6.23 No Pressure At Start Alarm ........................................................................................................................ 806.6.24 No Pressure Change At Start Alarm ........................................................................................................... 806.6.25 Overvoltage Alarm ...................................................................................................................................... 806.6.26 Undervoltage Alarm .................................................................................................................................... 816.6.27 VFD Communication Failure ....................................................................................................................... 817 OPTIONS.................................................................................................................................................... 827.1 Total Heat Recovery (Optional – A/C units only) ................................................................................ 827.2 Energy Meter including Current Limit (Optional) ................................................................................ 827.3 Rapid Restart (Optional) ..................................................................................................................... 837.4 Inverter Pump Kit (Optional) ............................................................................................................... 83