NieRuf EV01 - 8 Fault Elimination

8 Fault elimination
21/23 OPERATING INSTRUCTIONS FOR METAL SOLENOID-VALVES Index: 0
8 Fault elimination
WARNING
Risk of injury and poisoning by media
During all work on the valve, wear personal protective equipment.
Any medium leaks must be safely contained and disposed of in an
environmentally-safe manner.
Faults that are not mentioned in the table below or which cannot be attributed to the causes
specified should be discussed with the manufacturer.
Faults
Cause of fault
1
Troubleshooting
Valve leaky
Valve seat leaky
Replace valve.
Valve does not close
Nominal voltage is still
applied
Check control voltage.
Incorrectly fitted
Fit armature to the valve in accordance
with the flow direction.
Differential pressure
between valve inlet and
valve outlet too low
2
Make sure that the required differential
pressure between the valve inlet and
valve outlet is applied.
Plunger blocked
Replace armature.
Valve does not open
Operating pressure too high
Check operating pressure and, if
necessary, set permissible operating
pressure.
Supply voltage interrupted
or too low
Check power supply.
Check cable connection.
Nominal voltage and coil
voltage do not match
Make sure that the valve is suitable for
the intended use.
Solenoid coil faulty
Fit new solenoid coil
(see 7.2.2).
Plunger blocked
Replace armature
Medium leaking from
pipeline connection
Pipeline connection leaky
Check pipeline connection to the
armature. If necessary, replace the seal.
1) Faults apply to standard valves (NC) normally closed
2) Applies to Type EV04 / MV04 and EV05 / MV05