GE RPV311, Technical Manual

Page: 248 / 295

RPV311 Chapter 16
– Maintenance and Troubleshooting
RPV311-TM-EN-7 248
The RPV311 has a small coin-battery battery to power the
internal clock. It is advisable that the battery is not
replaced. In case of such need, contact the GE support
center.
1.1.1 Alarms
First check the alarm status LED to see if any alarm conditions exist. If so, press the
Read key repeatedly to step through the alarms.
After dealing with any problems, clear the alarms. This will clear the relevant LEDs.
1.1.2 Measurement Accuracy
If the power system is energised, the measured values can be compared with known
system values to check that they are in the expected range. If they are within a set
range, this indicates that the A/D conversion and the calculations are being
performed correctly.
Alternatively, the measured values can be checked against known values injected
into the device using the test block, (if fitted) or injected directly into the device's
terminals..
1.2 Replacing the Unit
If your product should develop a fault while in service, depending on the nature of
the fault, the watchdog contacts will change state and an alarm condition will be
flagged. In the case of a fault, you should normally replace the cradle which slides
easily out of the case. This can be done without disturbing the scheme wiring.
In the unlikely event that the problem lies with the wiring and/or terminals, then you
must replace the complete device, rewire and re-commission the device.
If the repair is not performed by an approved service centre,
the warranty will be invalidated.
Before carrying out any work on the equipment, you should
be familiar with the contents of the Safety Information section
of this guide or the Safety Guide SFTY/4LM, as well as the
ratings on the equipment’s rating label. This should ensure
that no damage is caused by incorrect handling of the
electronic components.
Before working at the rear of the unit, isolate
all voltage and current supplying it.
1.3 Cleaning