Daikin MicroTech Operation And Maintenance page 61

Hydronic Water Coil Freeze Fault
Name: WaterCoilFreezeFaultAlarm
Description: Hydronic water coil freeze fault to protect coil
from freezing. Note: see WaterCoilFreezeProblemAlarm
for problem alarm that occurs when the unit has a face and
bypass damper.
Type: Fault
Activate: Unit is configured to have a Hydronic Water Coil
Freeze Stat installed, the associated binary input is open. and
the face and bypass damper is disabled.
Upon active:
• Alarm type is Fault which causes unit shutdown.
• State: Off Alarm
• Alarm is indicated on the LUI
• Fault relay is energized
• LED output fault indication is activated
• Space fan is immediately de-energized
• Compressor is immediately de-energized
• Outdoor fan is immediately de-energized
• Outside air damper is forced closed
• All electric heat stages are de-energized
• The hot/cold water valves are forced to position of 50%.
Deactivate: Freeze stat input closes
Reset: Auto
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Application Configuration Alarm
Name: ConfigurationAlarm
Description: There is an issue with one or more configuration
parameters. This means that multiple, or duplicate, inputs have
been configured for the same functionality.
Type: Warning
Upon active:
• Alarm is indicated on the LUI
Deactivate: Activate is not Active.
Reset: Auto
Control Board Alarm
Name: ControlBoardAlarm
Description: The application has detected a functional issue
with the control board.
Type: Fault
Activate: Internal application point ControlBoardStatus bit field
is not 0.
Upon active:
• Alarm is indicated on the LUI
• Unit is shut down
Deactivate: Internal application point ControlBoardStatus bit
field is 0.
Reset: Auto (this is not likely to reset as the cause is usually a
hardware problem with the board).
61 OM 1280-2 • MICROTECH UNIT CONTROLLER
Diagnostics and Service