Trane Thermafit MWC Series Installation, Operation And Maintenance Manual page 32

Operating Procedures
Table 6. Home screen features (continued)
Feature
5 - Setpoint
6 - Controlled Temperature
Reading
7 - System Temperature
Sensors Reading
8 - System Status
9 - System Mode
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Description
Calls up cooling/heating setpoint pop-up screens respectively depending on the Mode. Accessible for 'tech' only. These dialog
boxes themselves display the resulting cooling/heating setpoint used for machine temperature control.
Note: The only box on these pop-ups accessible for 'tech' user. The other settings are view-only. See following figures below.
Figure 16. Cooling setpoint
Figure 17. Heating setpoint
Based on chilled water entering/leaving temperatures for Cooling Mode and hot water temperatures entering/leaving for
Heating Mode
Possible Options:
• System ON – System is operational and is not off by any of the conditions listed below.
• Phase Alarm – System is off by Phase Alarm.
• OFF by DI – System is off by opened state of primary PLC DI1 if corresponding option applies.
• OFF by Switch – System is off by software switch. It can be turned on/off either from Home Screen (button marked 11 on
Figure 14, p. 30), which all users have access to. It can also be turned on/off from BAS (Building Automation System).
• OFF by switching to Cooling – System is off and is switching over to Cooling Mode.
• OFF by switching to Heating – System is off and is switching over to Heating Mode.
• OFF by switching Mode – System is off and is going through a change of a major parameter. For instance, Number of
Refrigeration Circuits, Number of Fan Banks etc.
• OFF by Condenser Pumps – System cannot run due to disabled Condenser Pump Module, if applicable.
Note: Applies only to MWC.
• OFF by Evaporator Pumps – System cannot run due to disabled Evaporator Pump Module, if applicable.
Note: Applies only to MWC.
• OFF by Hot Water – System is off by Hot Water cutout.
• OFF by BMS – System is off by Building Management System.
Indicates chiller thermal mode: Cooling or Heating.
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