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MCS – MicroMag Error / Alarm Manual
Version: 02/21/2020
This alarm will trip if the chiller has lost phase,
forcing the chiller to temporarily shut down until any
faults are cleared on the phase monitor.
Note: Supervisor password (2112) is
required to reset lockouts
MicroMag Alarms
Possible Causes
Solutions
Problem with 24VAC
Check transformer output to make sure it is
outputting 24VAC to the phase monitor. If
not, make sure the transformer inputs are
set up for the correct line voltage
Verify that all wires are connected securely
to the transformer and to the phase monitor
Check for any blown fuses (left photo)
Problem with 5VDC
MicroMag output
Ensure MicroMag is outputting 5VDC from the sensor terminal
If MicroMag is not outputting 5VDC, call Drake for assistance
Fault on Phase Monitor
See Appendix C to troubleshoot
(Phase monitor is shown to the right)
Phase Loss
7
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