63230-300-212 Chapter10—Maintenanceand Troubleshooting
April 2001 Troubleshooting
125
© 2001 /Schneider Electric All Rights Reserved
The informati on in Table 10–1 describes potentialproblems and their
possiblecauses. It also describes checks you can perform or possible
solutionsfor each. After referring to this table, if you cannotr esolvethe
problem, contactthe your local Square D/Schneider Electric sales
representativefor assistance.
Tabl e 10–1: Troubleshooting
Potential Problem Possible Cause Possible Solution
Thered maintenance LED is
illuminatedon the circuit monitor.
Whent he red maintenanc e LED is illuminate d, it
indicates a potential hard ware or firmware
problemin the circuit monitor.
Contactyour local sales representativefor assistance.
Thegreen control powerLED is
notilluminated on the circuit
monitor.
The circuit monitor is not receiv ing the
necessary power.
Verifythat the circuitmonitor line (L) andneutral (N)
terminals (termin als 25 and 27) are receiving the
necessarypower.
The display is blank after applying
control power to the circu it monitor.
The display is not receiving the nec essary
poweror co mmunications signa l from the circuit
monitor.
Verify that the display cable is prope rly inserted into the
connectorson the displayand the circuit monitor.
Thedata being displayedis
inaccurate or not what you expect .
Circuit monitor is gro unded incorrectly. Verifyt hat the circuit monit or is grounded as descr ibed in
“Groundingthe Circuit Monitor”onpage 54 of the
installation manual.
Incorrect setup va lues. Check that the correc t values have been ent ered for circuit
monitorsetup parameters (CT and PT ratings,System
Type,NominalFrequency,and so on). See “Setting Up the
MeteringFunctions of the CircuitMonitor”on page 16 for
setupinstructions.
Incorrectvoltage inputs. Checkcircuitmonitor voltageinput terminals (9,10, 11,12)
to verify that adequate vol tage is present.
Circuitmonitor is wired improperly. Check that all CTs andPTs are connected correctly
(properpolarity is observed)and that they are energized.
Check shorting t erminals. See “Wir ing CTs, PTs, and
Control Power to the Circuit Moni tor”onpage 38 of the
installation manual for wiri ng diagrams. Initiate a wiring
checkfrom the circuit monitor display.
TROU BLE SHO OT ING
HAZARD OF ELECTRIC SHOCK, BURN,OR EXPLOSION
•Bewareof potentialhazards, wear personal protective equipment,
carefullyinspect the work area for tools and objects that may have
been left inside theequipment.
•Use caution whiler emovingor installing panels so that they do not
extendinto the energized bus; avoidhandling the panels, whichcould
cause personal injury.
Failure tofollow this instruction will result in death or serious
injury.
DANGER