13.3. ENTER TO GET AUTHORIZED ................................................................................................................. 19
13.4. PASSWORD ACCEPTED .......................................................................................................................... 19
14. Main Menu Functin Keys ................................................................................................................................... 20
14.1. MAIN MENU ............................................................................................................................................... 20
14.2. HELP DISPLAY .......................................................................................................................................... 20
14.3. MHRC LARGE TYPE DISPLAY ................................................................................................................. 20
14.4. LARGE TYPE DISPLAY ............................................................................................................................. 20
15. MHRC MODES .................................................................................................................................................... 21
15.1. UNIT IN POWER UP .................................................................................................................................. 21
15.2. NO RUN- I/O LOSS ................................................................................................................................... 21
15.3. UNIT IN LOCKOUT .................................................................................................................................... 21
15.4. UNIT IS OFF ........................................................................................................................................... 21
15.5. UNIT IS HOLDING ..................................................................................................................................... 21
15.6. UNIT UNLOADING .................................................................................................................................... 21
15.7. UNIT IS LOADING...................................................................................................................................... 22
15.8. RUN/STOP SW OFF .................................................................................................................................. 22
15.9. SCHEDULED OFF ..................................................................................................................................... 22
15.10. OFF-NO FLOW .......................................................................................................................................... 22
15.11. UNIT IS UNLOADED .................................................................................................................................. 22
15.12. UNIT IS LOADED ....................................................................................................................................... 22
15.13. SWITCHING MODES ................................................................................................................................. 22
16. MHRC Sequence of Operation .......................................................................................................................... 23
17. MCS-MAGNUM EXV Suction/Discharge Superheat Logic ............................................................................. 25
17.1.1. EXV Related Set points. ....................................................................................................
20. MHRC MAGNUM Set Points .............................................................................................................................. 31
21. MHRC MAGNUM Alarms and Safeties .............................................................................................................35
21.1 Introduction.................................................................................................................................................. 35
21.2 Information only alarms .............................................................................................................................35
21.2.1 System generated alarms .................................................................................................................... .....35
21.2.2 Alarms as a result of user actions .............................................................................................................35
21.2.3 Alarms generated by the control algorithm ...............................................................................................36
21.3 MHRC MAGNUM system alarms ...............................................................................................................36
21.3.1 Alarms are generated by the MHRC MAGNUM control algorithm:............................................................36
21.3.1.1 Configuration problem alarms .......................................................................................................36
21.4 MHRC Unit Safeties ....................................................................................................................................37
21.4.1 Introduction.....................................................................................................................................................37
21.4.2 Unit Safeties ...................................................................................................................................................37
21.5 MHRC Compressor Safeties ......................................................................................................................38
21.5.1 Introduction ..........................................................................................................................................38
21.5.2 Compressor safeties ..................................................................................................................................38
21.6 Condenser Fan safeties ..............................................................................................................................39
21.7 Heating Stages Safeties ..............................................................................................................................40
21.8 EVAPORATOR SAFETIES..............................................................................................................................40
22. APPENDIX A - MAGNUM No Run Capacity Run States ..................................................................................41
23. APPENDIX B
-
MHRC
Refrigerant Circuit Layout
..................................................................................................42
24. APPENDIX C - Controls Layout.............................................................................................................................43
25. APPENDIX D - Wiring Diagram..................................
...........................................................................................45
26. APPENDIX E - MHRC2 Frequency Drive Drawings..............................................................................................46
27. APPENDIX F - Configuration .................................................................................................................................49
28. APPENDIX G - MCS Trouble Shooting Reference ...............................................................................................64
21.3.1.2 MCS I/O network problem alarms ................................................................................................36
21.3.1.3 Sensors fault alarms.......................................................................................................................36
4
28
17.1.2. EXV Control States............................................................................................................... 28
18. MAGNUM Condenser Control Strategy .......................................................................................................... 29
19. MCS-CONNECT CONTROL STATUS DISPLAY ............................................................................................... 30
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