6
Troubleshooting
Troubleshooting l 6-17
Problem
Machine Loader Conveying
Demand (MDC Option)
(cont.) - The demand sensor
located at the material receiver
has not been satisfied after
three consecutive attempts.
Hopper Loader Conveying
Demand (MDC Option) -
The demand sensor located at
the material receiver has not
been satisfied after three
attempts.
Possible cause
Conveying blower is not coming on.
The conveying filter is clogged.
Hoses have come off or are loose in
the conveying loop.
The air operated valves are not operat-
ing.
The sensor is not adjusted properly.
No material is being conveyed.
The conveying load time is too short.
Conveying blower is not coming on.
The conveying filter is clogged.
Hoses have come off or are loose in
the conveying loop.
The air operated valves are not operat-
ing.
Solution
Check the blower fuses in the control
and the overload settings.
Clean or replace the conveying filter.
Check for loose hoses and make sure
all hose clamps are secure.
Make sure compressed air is con-
nected and that the solenoid valves
are operating properly.
Adjust the sensor as needed.
Check material supply.
Increase the load time setpoint.
Check the blower fuses in the control
and the overload settings.
Clean or replace the conveying filter.
Check for loose hoses and make sure
all hose clamps are secure.
Make sure compressed air is con-
nected and that the solenoid valves
are operating properly.
Passive Alarms
If the amber Acknowledge Alarm LED is blinking, the alarm is a passive alarm.
The dryer continues to operate, but this problem could prevent correct drying of
your material. Note that once the Acknowledge Alarm button is pressed once, the
blinking amber LED becomes solid.
NOTE: Passive alarms can be configured as shutdown alarms (see the previous Shut-
down Alarms section). See page 4-26, screen 62 for instructions..
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