OMEGA AIR A-DRY Series, Installation And Operating Manual

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14 Troubleshooting
14.1 Controller
Consult chapter 5 Controller !
14.2 Control Valves
When adsorption dryer is not operating properly as described in the section 4 Description of
operation and the controller is functioning properly without malfunction then one reason for
the malfunction could be the control valves.
The functioning of the control valves can be checked during normal operation of the
controller. Monitor the adsorption dryer through two adsorption-regeneration cycles.
During the stages of the cycles and both switch-over sequences all four valves should be
activated. You can check if the valve has been activated by holding a steel object (screw
driver etc.) under the coil of the valve. See the bottom picture (14.2). Please mind that the
point of view on the picture is due to better presentation,
the adsorption dryer should be in
and upright position during the operation
. If the valve has been activated the
electromagnetic field generated by the valve coil will cause the steel object in your hand to
vibrate slightly.
If the electromagnetic valve does not activate during the test then the electromagnetic valve
has malfunctioned. Contact your supplier to order the
Valve replacement kit (check page 32
for more information) or to order the maintenance.
If all electromagnetic valves activate then the electromagnetic part of the valve is working
properly and there is a possible malfunction of one of the control valve membranes.
Valve coil
Valve coil
(14.2)