Troubleshooting Guide
CN-IC1-09
Title
:
i-Controller REV.200 Alarms (Troubleshooting)
EXTERNAL
7
1-19MAY2021
Fan Fail Alarm
The fan fail alarm is generated when a fan fails to start for more than 10-minutes when enabled by the controller. When a
fan fail alarm is generated,
“
ALARM
” will be displayed next to “
Fan Status
” on the
Alarms
screen.
This alarm is generated when the digital airflow switch, located in the fan cabinet, detects a loss of airflow and switches
from normally open to closed. The Fan Fail alarm may also be generated during a Phase Loss alarm.
When a fan fail alarm occurs, the Fl
ō
unit will be shut down. The fan fail alarm must be manually reset using the i-Controller
Visograph display.
Wait 10 minutes
If the airflow switch does not close
within 10 minutes, the unit will re-alarm
Did the fan
start?
Yes
No
Did the alarm
reappear?
No
Contact Tech
Support
1-888-598-1198
•
Check the Digital Phase Monitor for alarms (see page 12)
•
Verify switch operation
•
Verify the alarm input points on the board or controller
•
Check switch wiring and connections
•
Check that VFD is in remote mode (RE), not local mode (LO)
•
Check VFD for alarms
•
Check if VFD is in Base Block mode (displayed as
bb
•
Verify that controller is calling for the fan to turn on
•
Verify that motor has power applied
•
For power in, check main power
•
For power out, check motor leads
•
Check the fan fail circuitry
•
Verify the motor by checking the windings
Issue resolved
Yes
Is the issue
resolved?
No
Yes
Fan Fail Alarm is present
Reset the alarm
(see instructions below)