FORM 160.75-EG1 (519)
JOHNSON CONTROLS
105
E. Safety shutdowns enunciated through the display and the status bar, and consist of
system status, system details, day, time, cause of shutdown, and type of restart re-
quired. Safety shutdowns with a xed speed drive shall include:
1. Evaporator – low pressure
2. Evaporator – transducer or leaving liquid probe
3. Evaporator – transducer or temperature sensor
4. Condenser – high pressure contacts open
5. Condenser – high pressure
6. Condenser – pressure transducer out-of-range
7. Auxiliary safety – contacts closed
8. Discharge – high temperature
9. Discharge – low temperature
10. Oil – high temperature
11. Oil – low differential pressure
12. Oil – high differential pressure
13. Oil – sump pressure transducer out-of-range
14. Oil – differential pressure calibration
15. Oil – variable speed pump – pressure setpoint not achieved
16. Control panel – power failure
17. Motor or starter – current imbalance
18. Thrust bearing – proximity probe clearance (K compressors only)
19. Thrust bearing – proximity probe out-of-range (K compressors only)
20. Thrust bearing – position switch (P, Q & H9 compressors)
21. Watchdog – software reboot
F. Safety shutdowns with a VSD shall include:
1. VSD shutdown – requesting fault data
2. VSD – stop contacts open
3. VSD – 105% motor current overload
4. VSD – high phase A, B, C inverter heat-sink temp
5. VSD – high converter heat-sink temperature
Guide Specifications (Cont'd)
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