User guide

6-6 l Troubleshooting
Problem
Regeneration RTD Integrity
– If the regeneration RTD is
faulty, it shuts down the dryer.
Control Communications
Watchdog - The display
board has lost communica-
tions with the control board.
Phase Error - One of the
three power wires is connect-
ed wrong or one or more
phases of power is missing.
EEProm Write Error
Possible cause
There is a loose connection in the
wiring leading to the RTD.
The connection of the RTD plug on the
control board is loose.
The regeneration RTD has failed.
The control board has failed.
Plugs on wire harness between the
display and control boards are loose or
not wired correctly.
Display board or communications
boards have failed.
One of the three power wires are out of
phase.
A fuse has blown.
Phase detection board has failed.
Internal control board problem.
Solution
Check the RTD plug connection and
make necessary repairs.
Check the plug connection and tighten
if needed.
Replace the regeneration RTD.
Replace the control board.
Make sure plugs are tight on board
connections and match the wiring
diagram.
Replace the defective boards.
Switch the position of two of the incom-
ing lead power wires at the dryer.
Check and replace the fuse.
Replace the phase detection board.
Replace the control board.
Shutdown Alarms
If the red Acknowledge Alarm LED is blinking, the alarm is a shutdown
alarm. The dryer will shutdown automatically to prevent damage to the
equipment or personnel. Note that once the Acknowledge Alarm button is
pressed once, the blinking red LED becomes solid.
✐
NOTE: Some alarms can be set for shutdown or passive (screen 59, page 4-22).
These alarms may be listed in both sections.