Troubleshooting guide

Page 18
DRI-AIR INDUSTRIES, INC.
OPERATING MANUAL - ARID-X10B FLOOR MOUNT DRYER
Revision 3/28/02
The Dri-Air Electric Rotary Valve is designed to
provide very little process air flow restriction and
no leakage between zones. It incorporates high
temperature, self adjusting seals for years of
trouble free service. The electrical controls are
built into the end of the valve and include zone
position lights.
Trouble-shooting is easy. The valve is not
working properly if there are no lights
illuminated, or the lights indicating the valve’s
zone position do not match the ZONE light
displayed on the dryer’s control panel.
Check all electrical connections to valve to ensure
they are tight.
Do not attempt to adjust valve, contact factory
service department with serial number of dryer to
obtain replacement valve (Part # 83707).
DO NOT PUT FINGERS INTO VALVE WITH
POWER ON
PLC Mother Board
The dryer control package includes a PLC
controller that is programmed for the drying cycle
discussed previously. Each input/output terminal
on the Mother Board has a corresponding LED
that can be used for trouble-shooting. A lit LED
indicates the input or output is actuated. All PLC
inputs are 12 volts AC and the outputs to the
valve and main contactor are 110 volts AC. (See
drawings 84428 or 84429 for more detail.)
Display Panel & Display Board
The Control Panel displays the dryer status,
including heater operation and alarms. The
Display Board associated with the Display Panel
actuates the heaters with 15 volt DC outputs to
the heater relays.
TROUBLE-SHOOTING
DRI-AIR ROTARY ZONE
VALVE
TROUBLE-SHOOTING
CONTROLS - PLC &
DISPLAY BOARD