Flo i-Controller REV.200, Troubleshooting Manual, Page: 13 / 17

Troubleshooting Guide
CN-IC1-09
Title
:
i-Controller REV.200 Alarms (Troubleshooting)
EXTERNAL
13 1-19MAY2021
Phase Loss Alarm
The phase loss alarm is generated when the unit is not receiving proper power and to protect the motors and compressors
from voltage imbalance, over/under voltage or improper electrical phasing for 30-seconds. When a phase loss alarm is
generated,
“ ALARM ” will be displayed next to “ Phase Loss Status ” on the Alarms screen.
This alarm is generated when the phase monitor detects that the electrical phases are more than 10% out of balance, the
voltage is 10% higher or lower than design voltage, or phases are reversed. Upon detection of one or more of these
conditions, the monitor opens the secondary 24VAC circuit disabling the control circuit of the Fl
ō Unit. A phase loss alarm
may generate a fan fail alarm. Additional information will be displayed on the Phase Loss Monitor display (a smaller blue
monitor, located in the control cabinet). The phase loss alarm triggers an emergency shutdown of the unit.
When the normally closed phase loss input is closed, the phase loss alarm will automatically reset.
Phase Loss Alarm
present
Is the alarm
valid?
•
Investigate and resolve error
condition displayed on DPM
Yes No
•
Verify DPM operation
•
Check wiring and connections
•
Verify the input points on the
board or controller
•
Verify that the controller
setup is correct (NC vs. NO)
Has the alarm
cleared?
Yes
Contact Tech
Support
1-888-598-1198
No
Issue resolved