Troublesho oti ng l 6-13
6
Troubleshooting
Problem
Regeneration Low
Temperature – The regenera-
tion temperature is less than
the low temperature setpoint
for the specified time.
Defaults are 200°F {93°C} for
20 seconds.
Regeneration High
Temperature – If the regener-
ation temperature exceeds the
high temperature limit for the
specified time. Default values
are 400°F {204°C} for 20
seconds.
Regeneration Temperature
Loop Break – The regenera-
tion temperature is outside of
the operator entered deviation
alarm band (see Regeneration
Temperature Deviation passive
alarm) and the regeneration
temperature is not moving
towards the setpoint at a rate
greater than specified. Default
values are 2°F {1°C} over 40
seconds.
Possible cause
The regeneration heater has failed.
The output on the control board has
failed or the fuse has blown.
The regeneration RTD is loose or has
fallen out.
One of the solid state relays (SSRs)
failed in the closed position.
The output on the board has failed.
The regeneration heater has failed.
The regeneration RTD is loose or has
fallen out.
The regeneration blower is not running.
The output on the control board has
failed or the fuse is blown.
Solution
Check the heater fuses, and resistance
across each leg of the process heater.
Replace the control board or the fuse.
Check the regeneration RTD and tighten
if needed.
Replace the failed solid state relays
(SSRs).
Replace the board.
Check the heater fuses, and resistance
across each leg of the process heater.
Check the regeneration RTD and tighten
if needed.
Correct the cause of the non-functioning
blower.
Replace the control board or fuse.
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 when 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 Shutdown Alarms
section). See page 4-26, screen 62 for instructions.
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