Compac CNG User Manual

Troubleshooting
Solenoid Problems
Compac Industries Ltd.
Page 79
www.compacngv.com
Solenoid Problems
Problem
Likely Cause(s)
Recommended Action
The solenoid is not opening
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.
 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 troubleshooting
information below, investigate why it
has failed.
The solenoid coil is burnt out
 See the solenoid coil is burnt out
section below.
The solenoid piston seals are damaged,
jamming the piston in the closed
position.
 Clean the solenoid and replace the
valve seals.
The solenoid is not closing
The solenoid piston seals are damaged,
jamming the piston in the open position.
 Clean the solenoid and replace the
valve seals.
There is dirt or water in the gas supply,
jamming the piston in the open position
 Clean the solenoid and replace the
valve seals.
 Change the filter and remove the water
source or install a drier.
The solenoid is not sealing
The solenoid piston seals are damaged.
 Clean the solenoid and replace the
valve seals.
There is dirt or water in the gas supply.
 Clean the solenoid and replace the
valve seals.
 Change the filter and remove the water
source or install a drier.
The solenoid coil is burnt out
Dirt or water in the solenoid has
prevented the armature from rising and
opening the solenoid, resulting in the
solenoid coil heating up and burning
out.
 Replace the solenoid coil
 Clean the solenoid and replace the
valve seals.
 Change the filter and remove the water
source or install a drier.
High voltage or voltage spikes have
caused the solenoid coil to burn out
 Fit a voltage stabilising UPS to the
dispenser power supply
 Replace the solenoid coil
Coil has been removed from solenoid
and energised, causing the coil to burn
out
 Replace the solenoid coil
Finally
If the solenoid is still not working reliably
 Fit the solenoid top service kit. Refer to
valve seal replacement (see page 48)

Compac CNG Specifications

General

Brand	Compac
Model	CNG
Category	Dispenser
Language	English