22
Pilot Operated Proportional DC Valve
Series D*1FB*EE Explosion Proof
Operating Instructions
Parker Hannifin Corporation
D_1FB-EE 5715-706UK.indd 11.01.19
7. Troubleshooting
A systematic approach must always be used in the
troubleshooting process. Begin by answering the
following questions:
• Does anyone have practical experience with
similar faults?
• Have any of the settings been changed in the
system?
Now try to identify the fault using a prioritised list
of the most likely causes.
• If you suspect that the valve is not moving
freely, you should flush the valve with clean
pressure fluid.
• A systematic approach should always be ad-
opted when troubleshooting a hydraulic sys-
tem.
The work must only be carried out by special-
ist personnel because detailed knowledge of the
function and structure of the system is required.
Always think carefully about changing settings or
removing components. Before starting work, check
that the system was working correctly before the
fault occurred.
Following any repair, commissioning must be car-
ried out as instructed.