Controller Description
42
Chilled/Heating
Chilled heating is a mode the Unit setpoint is set to above -10C. The function here is to maintain setpoint
temperature by controlling the temperature on the supply air.
The supply air is not allowed to be lower than the setpoint. Chilled heating mode can operate the unit
where only the evaporator fan low speed is running, evaporator high speed is running or evaporator high
speed and heat is on.
Frozen/cooling down
Frozen/cooling down mode where the Unit setpoint is set to below -10C. The function here is to maintain
setpoint temperature by controlling the temperature on the return air.
Frozen/cooling down mode can operate the unit in different modes where the compressor is loaded and
vapor injection is on/off. The condenser fan will operate in an on/off algoritim depending on the tempera-
ture on the condenser. The evaporator fans will operate in low speed mode or off.
Defrost
Defrost is a situation where the unit either on demand or timing is defrosting the evaporator coil. The unit
is heating with the heating elements awaiting 18C on the evaporator sensor.
When the set Defrost termination temperature is reached, the unit will return to the operation mode
depending on the setpoint.
PTI
PTI is a pretrip inspection and is used to diagnose the condition of the unit. There are a possibility to
chose between several type of PTI´s depending on the test needed to secure the functionality of the unit.
Function Keys
The function keys are the F1 - F4 keys located below the display. They allow the operator to move
quickly to a specific area of the information or into the controller menu.
Function keys will change based on what menu is active in the display
Figure 22: Function Keys
•
F1 ALARM key: Press to view an explanation for the current alarms present.
•
F2 C/F key: Press to view alternate temperature scale Celsius or Fahrenheit in display.
•
F3 SETPOINT key: Press to enter Setpoint menu. Press F2 Up or F3 Down keys to increase or
decrease the Setpoint. Press and Hold F4 until you are returned back to the main menu.
•
F4 MENU key: Press to view the extended Menu for the MP4000
BEN 056
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Страница 3: ...MAGNUM TK 60275 4 MM Rev 3 08 15 Copyright 2012 Ingersoll Rand EMEIA Printed in Ireland...
Страница 193: ...Refrigeration Maintenance 191 Figure 163 Filter Drier...
Страница 200: ...Refrigeration Maintenance 198 Figure 169 Receiver Tank Figure 170 Water Cooled Condenser Tank...
Страница 257: ...255 Schematic Diagram RELEASED 19 Sep 2013...
Страница 258: ...256 Wiring Diagram Page 1 of 2 RELEASED 19 Sep 2013...
Страница 259: ...257 Wiring Diagram Page 2 of 2 RELEASED 19 Sep 2013...
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