Parker PWD Series, Руководство по эксплуатации

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35
Electronic for proportional DC valves
Series PWDXXA-40X
Operation Manual
PWDXXA-40X_20 5715-677 UK.indd 26.01.17
Parker Hannifin Corporation
Hydraulics Group
Parker Hannifin Corporation
Hydraulics Group
Location of status indicator
Operating condition LED-display
no failure green
no supply voltage off
no enable signal yellow
cable break feedback sensor (not for options voltage / +-20 mA) red
cable break command signal (only for option 4...20 mA) red
internal processor fault red
Function assignment
status indicator
6. Maintenance
Periodical maintenance is essential for the lon-
gevity of the unit and guarantees reliability and
availability.
The following properties of the electronics have
to be checked in continuous short time intervals:
• tight fit on the mounting rail
• tight fit of the disconnectable terminals
• tight fit of the terminal screws
• environmental temperature level
• supply voltage level
• cleanliness of the ambience Service work may only be carried out by
qualified personnel. Detailed knowledge of
the machine functions concerning switching
on and off as well as of the required safety
relevant technical tasks is necessary!
7. Trouble-shooting
Basis of trouble-shooting is always a systematic
approach. At first the following questions have to
be checked:
• Are there practical experiences with similar
failures?
• Have system adjustments been changed?
In either case the available diagnostic options
should be used. The electronics permits a
diagnostic of the valve function via the
monitor output. The status output monitors
the working condition of the electronics, an
additional visual status results from an LED
indicator.