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I-210+ User Manual
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Chapter 4 • Maintenance
Errors and Cautions
The meter performs self-tests periodically. These self-tests are performed when the
meter powers up, and once every 24 hours thereafter. The current metering data is
stored to non-volatile memory (NVRAM) prior to performing the periodic
self-test. If the meter detects an error it will repeat the self-test every minute in
order to attempt to recover from the condition causing the error. If the conditions
causing the error clear, the meter will resume metering.
If an error occurs, the meter will display  in the primary display along with
the kWh value at the time the error occurred. The kWh value and  will
alternate on the display with a three second display time. The alternate display will
also indicate  continuously.
The disk analog display and the energy direction display will not be operational
and the meter will not accumulate energy when an error is present.
An error display indicates a fault in an electronic subsystem of the meter and
indicates a condition that is not user serviceable. The meter must be returned to the
factory for service.
Caution Description
Received kWh This flag is set when energy flows from load to line for two minutes
(120 consecutive seconds). It will be cleared when energy flow is
from line to load or below creep for 2 consecutive minutes.
Meter Inversion If the direction of energy flow is stable for two minutes, then the meter
stores the direction of energy flow in NVRAM during power fail. If
the direction of energy flow changes from the time a meter powers
down to the time it powers up, the inversion caution flag is set.
DC detection If enabled this flag is set when Meter detects the DC presence.
NOTE: Use of the DC Detection feature is not recommended, and
therefore it should be disabled.
Error Description
Service Error Set if a 12S is installed in a 1S or 2S socket or if a 1S or 2S meter is
installed in a 12S socket.
Meter Error Meter chip error
NVRAM CRC The CRC for ST85, ST86, MT20, or MT21 is wrong, indicating
that data is corrupted.
NVRAM I2C EEPROM interface not functioning. No data can be read from or
written to NVRAM.