Chapter 5—Maintenance and Troubleshooting
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CHAPTER 5—MAINTENANCE AND TROUBLESHOOTING
MAINTENANCE The circuit monitor does not require regular maintenance, nor does it
contain any user-serviceable parts. If the circuit monitor requires service,
contact your local Schneider Electric sales representative, or call the
POWERLOGIC Technical Support Center for assistance. See Getting
Technical Support in this chapter. Do not open the circuit monitor. Opening the
circuit monitor voids the warranty.
Battery-Backed RAM The circuit monitor uses battery-backed nonvolatile RAM to retain all data
except calibration constants. Calibration constants are stored in nonvolatile
EEPROM, which requires no battery. The circuit monitor’s battery-backed
RAM lasts many decades under typical operating conditions. The
battery-backed RAM is activated when the circuit monitor is manufactured.
With no control power applied to the circuit monitor, the battery can back up
RAM for a continuous period of 7 years at 70°C. Once control power is
applied, the RAM battery is no longer under load. Under no load, the life of
the battery-backed RAM is 100 years at 55°C continuous, 40 years at 60°C
continuous, and 10 years at 70°C continuous. Should the RAM ever need
replacement, contact your Schneider Electric representative.
HAZARD OF ELECTRIC SHOCK
Do not attempt to service the circuit monitor. CT and PT inputs may
contain hazardous currents and voltages. Only authorized Schneider
Electric service personnel should service the circuit monitor.
Failure to observe this precaution will result in death or serious
injury.
DANGER
!
HAZARD OF EQUIPMENT DAMAGE
Dielectric (Hi-Pot) testing of the circuit monitor may damage the unit.
Do not Hi-Pot or Megger. Before Hi-Pot or Megger testing any
equipment in which the circuit monitor is installed, disconnect all
input and output wires to the circuit monitor.
Failure to observe this precaution can result in equipment
damage.
CAUTION
!
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