ITRON Centron, Technical Reference Manual

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Testing, Troubleshooting, and Maintenance
76 CENTRON® Meter Technical Reference Guide
Inspecting and Troubleshooting—General
Due to the modular architecture of the CENTRON meter, modules of similar voltage (120V
or 240V) may be interchanged. Therefore, the personality module of the CENTRON you are
troubleshooting can be placed on a known working base to verify proper operation of the
personality module. Likewise, a known working personality module may be placed on the
base of a meter to verify proper operation of the meter.
This section provides a list of the most likely problems that you may encounter, along with
possible causes and solutions.
Blank Display
Cause Solution
Power not applied to the meter Apply power.
Loose power supply connection Remove and re-seat board to board
connector.
LCD/LCD Driver failure Replace Register circuit board.
Note : Energy reading and tamper flags
may be uploaded with the ZRO-C2A.
Time and Date Wrong (TOU Version)

Time/Date Wrong in PC or Handheld Device —Verify and update time/date in
programming device and download new time and date to meter. Refer to the appropriate
software manual for more detailed directions.

Wrong Line Frequency —Verify proper line frequency is selected in setup routine in
programming software. Select proper frequency and reconfigure meter.

Battery Failure During Power Outage —Verify battery voltage. Replace module.

Daylight Savings Time Not Programmed Correctly —Verify DST is selected in
program. Reconfigure meter with correct program.

Component Failure —Return meter for repair.
No Accumulation of kWh or kW
Cause Solution
Demand Delay Selected kW will not immediately accumulate after a
power outage if CLPU (Demand Delay) has
been selected. Accumulation will begin
immediately after Demand Delay has expired.
Verify register program and reconfigure meter.
Module was left in Test mode Accumulation of kW or kWh will not take place
while register is in Test mode. Exit Test mode
and verify proper accumulation begins.
Module Not Receiving Pulses Verify that meter is accumulating energy by
testing infrared test LED.