Edwards D395-90-000, Instruction Manual

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MAINTENANCE
D395-90-880 Issue E
5 MAINTENANCE
The ADC requires no regular maintenance. The unit is factory calibrated and will remain in calibration throughout it's
lifetime. Maintenance is limited to fault finding and software upgrades if required.
5.1 Safety
5.2 Fault finding guide
WARNING
Hazardous voltages are present inside the Controller. Qualified personnel only should carry out
servicing.
Table 11 - Fault finding guide
Symptom Possible cause Remedy
Display blank
(no LEDs lit) Electrical supply defective Check electrical supply cable and external fuses.
Connect the electrical supply cable to any other device to
confirm that the supply is good.
Short circuit or overload on
connections Remove all connectors except the electrical supply and
re-check. If display now lights, there is a fault in one of
the external leads or devices. Re-connect one at a time
until the fault is pinpointed.
Internal fuse blown Measure the voltage present between pins 1 and 2 of the
RJ-45 gauge connector. This should be about 23V. If there
is no voltage present then the internal fuse could be
blown. This fuse is not replaceable and will only blow in
the event of a major malfunction.
Display shows "ERR" An error has been detected by
the Controller or by a
connected gauge Refer to Appendix A for a description of error numbers.
Press the ENTER key ( ) to clear the message.
Display shows "???" A gauge has not been
recognised by the ADC Check that the gauge is a type listed in Table 1 , and is
supported by the ADC version which you have.
Unable to turn on
AIM gauge 2 ADCs connected and Link
blocking manual operation via
comms Adjust set-point 1 on controlling ADC above or within
operating range of controlling gauge. See
Section 4.5.2 .
2 ADCs connected and Link set
point set below operating range
Controlling and controlled
gauges connected and Link
Thresholds blocking manual
operation or operation via
comms
Adjust Link Thresholds above or within operating range of
controlling gauge. See
Section 4.5.2 . If problems persist
then reset the ADC to Factory Defaults. See Section 4.2.1 .
Controlling and controlled
gauges connected and Link
Thresholds set below operating
range