M52 Microprocessor User's Guide
M52UMCT Oct-03 3
Table of Contents
Sequence of Operation ..................................................................................................................................................... 6
Phase Loss (OPTION):.................................................................................................. 6
Analogue and digital outputs for functions ................................................................... 6
DX Demand (Cooling)................................................................................................... 6
Chilled Water................................................................................................................. 7
DX Demand (Dehumidification): .................................................................................. 7
Rapid Dehumidification Feature (All except China units) ............................................ 7
Dual Cooling Units: Series 9 only................................................................................. 8
Free Cooling Units: Series 9 only ................................................................................. 8
Reheat:........................................................................................................................... 9
Humidifier: .................................................................................................................... 9
PID .............................................................................................................................. 10
Internal Safety Controls............................................................................................... 10
External Optional Safety controls ............................................................................... 10
On/Off Control............................................................................................................. 10
Back up Capability ...................................................................................................... 10
Note: On/Off mode: ..................................................................................................... 10
Powering Up / Powering Down...................................................................................................................................... 12
The Control Panel........................................................................................................................................................... 13
Banner line .................................................................................................................. 13
Active tab display area ................................................................................................ 13
Tab bar ........................................................................................................................ 13
Operating Status............................................................................................................................................................. 14
Main Return Air Temperature & Humidity Readout ................................................... 14
Process status Display................................................................................................. 14
Network Address.......................................................................................................... 14
Alarm Icon................................................................................................................... 14
Unit fan On/Off Icon.................................................................................................... 15
On/Off Mode Icon........................................................................................................ 15
Co-Work™ Address Icon............................................................................................. 16
Security............................................................................................................................................................................ 17
Log-in Security............................................................................................................ 17
Log-out Security.......................................................................................................... 18
Change Password ....................................................................................................... 18
Alarms ............................................................................................................................................................................. 20
Review Active Alarm Queue........................................................................................ 20
Acknowledging Alarm................................................................................................. 21
Clear Alarm Message.................................................................................................. 21
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