6 - 1 2 l Tr o u b l e s h oo t in g
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 (if equipped) -
One of the three power wires
is connected wrong or one or
more phases of power is miss-
ing.
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 dia-
gram.
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.
S h u t d o w n Al a rm s
If an alarm occurs, a red dialog box is displayed on the dryer’s touch screen control. The
dryer will shut down automatically to prevent damage to the equipment or personnel. The
dialog box will indicate whether the alarm is a shut down alarm or a passive alarm.