SRL Service Manual
Revision 00
July 2007
Page 46 of 56
10.2.9 drain Error (Warning)
What it means: Drain Operating Mode (Parameter D3) is set to Capacitive (Zero Air Loss) Mode,
and although the drain valve has been open for 30 seconds, the condensate level
sensor is still registering condensate in the chamber.
What it does: Cuts power to the alarm contacts. Turns on Warning Light & alternates between
“drE” and the dewpoint reading on the digital display. The drain is operated in
Timed Mode according to the interval and duration settings (parameters D1 & D2).
Possible Causes & Remedies:
1) Blockage, restriction or back pressure in the condensate discharge line.
Condensate is not being evacuated efficiently and is backing up in the heat
exchanger.
Remedy – Find the cause of the blockage, restriction or back pressure and fix it.
2) Defective condensate level sensor gives a signal indicating condensate is
present even if there is none.
Remedy - Replace the defective component.
3) Defective condensate drain valve.
Remedy – Replace the defective component.
To Reset: The drain will automatically return to Capacitive (Aero Air Loss) Mode operation
when the level sensor stops sensing liquid for at least 5 seconds, but alarm will not
automatically clear.
Push Alarm Reset to clear the alarm. The alarm will also clear if the drain operating
mode (Parameter D3) is changed to Timed or Continuous (Deactivated) Modes.
Notes: The drain alarm is possible whether the dryer is ON or in Remote Off Mode – as
long as there is power to the controller, and Parameter D3 is set to “Capacitive”
mode.
Even though the drain automatically operates in Timed Mode during this alarm,
Parameter D3 will continue to show that Capacitive Mode is the set mode of
operation.
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