ICM Controls ICM450 Application Guide

6
Fault Conditions
Press and release fault button to scroll through all saved faults.
Note: For initial setup, press and hold FAULT for 5 seconds to remove any previously
stored faults.
Fault Problem Corrective Action
Back Phase
Loss
Not all three of the phases
on the load side are
present
1. Re-energize the contactor.
2. If the fault reappears after the load energizes:
a. Turn all power OFF
b. Check all load side connections
c. Check the contacts of the contactor for debris or
excess carbon.
Back Phase
Rev
Loads 1, 2, or 3 are not in
sequence (not 120º phase
shifted)
1. Turn OFF all power.
2. Swap any 2 phases on the load side of the unit only
(example: swap load 1 and load 2) *
3. Re-apply power.
Back Phase
Unbal
A voltage unbalance
between the three load
phases exceeds the
unbalance setpoint
1. Press the READ button to observe the present load
voltages. Check system for unbalance cause.
2. Increase the fault interrogation time if necessary.
3. Increase the percent unbalance setting if necessary.
Front Over
Volt
Average phase-phase
voltage exceeds the
maximum percentage
1. Check system for over-voltage cause.
2. Increase the percent over-voltage setting if necessary.
3. Increase the fault interrogation time if necessary.
Front Phase
Loss
Not all three of the phases
on the line side are
present
1. Press and hold the READ button on the phase monitor
or use an AC voltmeter to carefully measure all three
phase-phase line voltages
(example: Line 1 è Line 2, Line 2 è Line 3, Line 3èLine 1).
2. Repair the missing phase.
Front Phase
Rev
Lines 1, 2, or 3 are not in
sequence (not 120º phase
shifted)
1. Turn OFF all power.
2. Swap any 2 phases on the line side of the unit. For
example: swap load 1 and load 2*.
3. Re-apply power.
Front Phase
Unbal
A voltage unbalance
between the three line
phases exceeds the
unbalance setpoint
1. Press the READ button to observe the present load
voltages. Check system for unbalance cause.
2. Increase the fault interrogation time if necessary.
3. Increase the percent unbalance setting if necessary.
Front Under
Volt
Average phase-phase
voltage is below the
minimum percentage
1. Check system for under-voltage cause.
2. Increase the percent under-voltage setting if necessary.
3. Increase the fault interrogation time if necessary.
* Only swap phases during initial setup, not after unit has been in operation without errors.

ICM Controls ICM450 Specifications

General

Brand	ICM Controls
Model	ICM450
Category	Measuring Instruments
Language	English