IQ DP-4000
SECTION 6 - TROU BLESHOOTING AND MAINTENANCE
Advanced Products Support Center {APSC) at
1 -800-
809-2772.
Symptom
Probable Cause(s)
All Operator Panel indicators are off.
AC line voltage level is deficient.
Separate Source AC control power is
deficient (only if using separate source
power module).
AC line, or optional, external PTs are not
properly selected, wired, or installed.
Digit 1 flashes in the display window, A trip condition has been externally
indicating an external trip.
initiated through the Communications
Port.
Digit
2
flashes in the display window AC line, or optional, external PTs are not
indicating an overvoltage
properly installed or wired.
Digit 3 flashes in the display window, An Undervoltage condition actually exists.
indicating an undervoltage.
Digit
4
flashes in the display window, A Phase Unbalance condition exists.
indicating a phase unbalance.
Digit 5 flashes in the display window, A Voltage Phase Loss condition exists.
indicating a voltage phase loss.
Blown or loose fuse(s).
Digit 6 flashes in the display window, A Current Phase Loss condition exists.
indicating a current phase loss.
Digit 7 flashes in display window, A Phase Reversal condition exists.
indicating a phase reversal.
Digit
8
flashes in display window,
IQ DP-4000 is detecting an internal
indicating an internal malfunction.
malfunction.
One or more voltage phases read Blown or loose fuse(s).
incorrectly.
Incorrect PT ratio.
Current readings are not accurate or read
I ncorrect size CTs used.
zero.
Incorrect CT ratio.
Power readings are incorrect.
Phasing for voltage and current is
incorrect.
Table
6. A
Initial Power-On Troubleshooting
40
TD1 7548A
Solution
Locate cause of deficiency in AC line
monitored.
Locate the cause of the deficiency in the
AC control power line. If power is
sufficient, replace unit.
Verify that the AC line and/or PTs are
wired as shown on the wiring plan
drawings for the application.
Determine why the trip was initiated from
the
external
device
through
the
Communications Option.
Verify that the AC line, and PTs are
installed and wired as shown on the
wiring plan drawing for the application.
Isolate the AC line deficiency's cause.
Isolate the cause of the AC line
deficiency.
Isolate the cause of the AC line phase
cause.
Check the fuse(s) on the affected
phase(s). Reseat fuse(s). Replace if
necessary.
Correct the improper wiring.
Isolate the cause of the AC line reversal.
Check the utility to determine their phase
sequence.
Replace the unit.
Check fuse(s) on the affected phase(s).
Reseat the fuse(s). Replace if necessary.
Check PT ratio.
Replace with proper size CTs.
Check CT ratio.
Check phasing. Verify connections with
wiring diagrams.
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