York YK Manual page 14

FORM 160.75-EG1 (519)
Equipment Overview (Cont'd)
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 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 (TM model drive only)
6. Harmonic filter – high heat-sink temperature
7. Harmonic filter – high total demand distortion
G. Cycling shutdowns enunciated through the display and the status bar, and consists
of system status, system details, day, time, cause of shutdown, and type of restart
required.
H. Cycling shutdowns with a fixed speed drive include:
1. Multi unit cycling – contacts open
2. System cycling – contacts open
3. Oil – low temperature differential
4. Oil – low temperature
5. Control panel – power failure
6. Leaving chilled liquid – low temperature
7. Leaving chilled liquid – flow switch open
8. Motor controller – contacts open
9. Motor controller – loss of current
10. Power fault
11. Control panel – schedule
12. Starter – low supply line voltage (SSS option)
14 JOHNSON CONTROLS