6-10 l Trou ble sh oo ti ng
Problem
Process Blower overload
(cont.) - If the process blower
exceeds its full load amp rat-
ing or the overload has
tripped due to a mechanical
or electrical problem the
dryer will shut down.
NOTE: Once the overload
has tripped, you must wait
2 - 15 minutes with power
on for it to reset automati-
cally.
Process Protection
Differential* - If the differ-
ence between the process tem-
perature exiting the process
heater and the temperature of
the air entering the hopper is
greater than 175°F {97°C} for
longer than 180 seconds it
shuts down the dryer.
Possible cause
Loss of phase of power to the motor
starter.
The overload is set incorrectly.
The overload is defective.
The air lines between the dryer and hop-
per are restricted or loose.
The dryer is located too far away from
the hopper.
The process RTD is loose or has fallen
out.
The process blower is not running.
The process hose is not insulated.
Solution
Check for a blown fuse in the dryer or
main power supply. Allow overload to
reset and then try to restart the dryer.
Disconnect and lock out main power.
Check the overload settings and con-
firm that the settings match the full
load amps listed on the process blower
motor. Allow overload to reset and
then try to restart the dryer.
Replace the overload.
Check for airflow blockages or loose
hoses between the outlet of the dryer and
the inlet of the hopper. Straighten any
crimps in the hoses. Tighten any loose
hoses.
The dryer and the hopper should not be
located more than 10 feet {305 cm}
apart.
Check the process RTD and tighten if
needed.
Correct the cause of the non-functioning
blower.
Insulated hose is required for high dry-
ing temperatures.
✐
Shutdown Alarms
If the red Acknowledge Alarm LED is blinking red, the alarm is a shutdown
alarm. The dryer will shutdown automatically to prevent damage to the
equipment or personnel. Note that when the Acknowledge Alarm button is
pressed once, the blinking red LED becomes solid.
*Older software versions are
equipped with Process
Protection RTD and this alarm
may occur. However, newer ver-
sions do not have Process
Protection RTD and this alarm
will not be displayed. If the
alarm does occur it is a indica-
tion that the software is not
configured properly. Call Conair
Service for assistance.
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