Krom Schroder VGP10, Operating Instructions Manual, Page: 6 / 8

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27 Tightness OK: the unit is ready for operation.
28 Open the pipeline again and release the gas
supply.
Assistance in the event of
malfunction
WARNING
Electric shocks can be fatal! Before working on
possible live components, ensure the unit is discon-
nected from the power supply.
Fault-clearance must only be undertaken by author-
ized trained personnel.
Unauthorized repairs or incorrect electrical con-
nections can cause the solenoid valve to become
defective. In this case, our warranty will be ren-
dered void.
? Fault
! Cause
• Remedy
Possible faults and suggested solutions
?
The solenoid valve does not open, there is
no flow downstream of the solenoid valve.
! There is no power supply.
• Check wiring, see page 3 (Wiring).
!
Rectifier adapter defective.
• Remove socket and rectifier adapter, see
page 4 (Replacing the actuator), steps 
to 5 . Check the ohmic resistance of the rectifier
adapter between contacts  and 2 . Note the
inscription on the rectifier adapter.
1
2
• No resistance, replace adapter.
• The rectifier adapter is available separately as a
spare part.
! Actuator defective.
• Remove socket and rectifier adapter, see
page 4 (Replacing the actuator), steps 
to 5 . Check the ohmic resistance of the actuator
between contacts  (N) and 2 (L). Read off the
contact assignment from the rectifier adapter.
1
2
• No resistance, change actuator, see page 4
(Replacing the actuator).
• The actuator set is available separately as a spare
part.
! Guiding elements bent. Incorrect handling when
installing the unit.
• Dismantle the unit and return it to the manufac-
turer.
? The solenoid valve does not close securely,
the flow downstream of the solenoid valve
does not stop.
! Valve seat is dirty.
• Clean the valve seat, see page 4 (Mainte-
nance).
• Install a filter upstream of the solenoid valve.
! Valve seat is damaged.
• Dismantle the unit and return it to the manufac-
turer.
! Valve seal is damaged or hardened.
• Replace the valve seal, see page 4 (Mainte-
nance).
! Guiding elements bent. Incorrect handling when
installing the unit.
• Dismantle the unit and return it to the manufac-
turer.