Bulletin No. 3020IB9814
December 1998
68
TROUBLESHOOTING This section describes three potential problems, their possible causes, and
checks and/or cure for each. If, after completing the listed checks, you cannot
solve the problem, contact the POWERLOGIC Technical Support Center for
assistance. See Getting Technical Support on the next page.
PROBLEM: After applying control power to the circuit monitor, the display
is still blank.
Possible Cause: The circuit monitor is not receiving the necessary
power.
Check or Cure: Verify that circuit monitor L and N terminals (terminals
25 and 27) are receiving the necessary power. If you are using an
optional Voltage/Power Module (VPM), check to see that the module is
properly installed on the circuit monitor. Refer to your VPM instruction
bulletin.
PROBLEM: The data being displayed is inaccurate or not what you expect.
Possible Cause: Incorrect setup values.
Check or Cure: Check to see that the correct values have been entered
for circuit monitor setup parameters (CT and PT ratings, System Type,
Nominal Frequency, and so on). See Configuring the Circuit Monitor in
Chapter 4 for setup instructions.
Possible Cause: Circuit monitor is wired improperly.
Check or Cure: Check that CTs and PTs are connected correctly (proper
polarity observed) and energized. Check shorting terminals. See Wiring
CTs, PTs, and Control Power in Chapter 3 for wiring diagrams.
Possible Cause: Incorrect voltage inputs.
Check or Cure: Check circuit monitor voltage input terminals
(terminals 9, 10, 11,12) to verify that adequate voltage is present.
Possible Cause: Circuit monitor is grounded incorrectly.
Check or Cure: Verify that the circuit monitor is grounded as described
in Grounding the Circuit Monitor in Chapter 3.
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