Solenoid Problems - Compac CNG Installation And Service Manual

Solenoid Problems

Solenoid Problems
Problem
The solenoid is not opening
The solenoid is not closing
The solenoid is not sealing
The solenoid coil is burnt out Dirt or water in the solenoid has
Finally
Compac Industries Ltd.
Likely Cause(s)
Check that the power is reaching the
coil and it is energising. Place a
screwdriver (or similar metal object)
over the top of the coil and feel the
magnetic field created by the energised
coil.
The solenoid coil is burnt out
The solenoid piston seals are damaged,
jamming the piston in the closed
position.
The solenoid piston seals are damaged,
jamming the piston in the open position.
There is dirt or water in the gas supply,
jamming the piston in the open position
The solenoid piston seals are damaged. 
There is dirt or water in the gas supply.
prevented the armature from rising and
opening the solenoid, resulting in the
solenoid coil heating up and burning
out.
High voltage or voltage spikes have
caused the solenoid coil to burn out
Coil has been removed from solenoid
and energised, causing the coil to burn
out
If the solenoid is still not working reliably 
Page 48
Recommended Action
 If there is no magnetic field check the
LED for the triac.
If the triac LED light is coming on
check that the triac is delivering power.
 If the triac is delivering power but the
coil is not energising then the coil is
burnt out. Replace the solenoid coil
and, using the
information below, investigate why it
has failed.
 See the solenoid coil is burnt out
section below.
 Clean the solenoid and replace the
valve seals.
 Clean the solenoid and replace the
valve seals.
 Clean the solenoid and replace the
valve seals.
 Change the filter and remove the water
source or install a drier.
Clean the solenoid and replace the
valve seals.
 Clean the solenoid and replace the
valve seals.
 Change the filter and remove the water
source or install a drier.
 Replace the solenoid coil
 Clean the solenoid and replace the
valve seals.
 Change the filter and remove the water
source or install a drier.
 Fit a voltage stabilising UPS to the
loading post power supply
 Replace the solenoid coil
 Replace the solenoid coil
Fit the solenoid top service kit. Refer to
valve seal replacement (see page 27)
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Troubleshooting
troubleshooting