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Section 11:
Troubleshooting
Troubleshooting: Electrical
Problem
Possible Cause
Action
No dryer function
No power supply
Check supply
Power connected to wrong controller input
Check connections with specifications
listed in
Section 5
Faulty controller
Replace controller
Dryer does not activate external
alarm
when display panel indicates alarm
condition
Shorted or incorrect device wiring
Correct external wiring
External power not supplied
Add external power source per specifications
given in Section 5
Faulty external indication device
Repair or replace device
Faulty controller
Replace controller
Troubleshooting: Energy Management
Problem
Possible Cause
Action
Dryer does not enter Energy
Management when switching device is
activated
and/or
Dryer does not enter
Energy Management when EM contacts
are opened.
Shorted or incorrect device wiring
Remove external wiring from the dryer’s EM
contacts:
•
On LED controllers, dryer should enter
EM mode.
•
On DMC controllers, place jumper
between pins 1 and 2 of EM male
connector. Dryer should enter EM
mode.
•
If dryer enters EM mode, correct
external wiring problem
•
If dryer does not enter EM mode,
replace controller
Faulty switching device
Consult device manufacturer
Faulty controller output
Replace controller
Troubleshooting: Dewpoint control (DMC Controller only)
Problem
Possible Cause
Action
Dryer does not enter dewpoint mode
Hygrometer Din plug not connected correctly
to hygrometer
Check Din plug is tightly connected to
hygrometer with the Din plug
Demand is too high, dryer undersized
Check against specification
Hygrometer not reading accurately / fouled
Verify hygrometer calibration
Hygrometer failed (electrically)
Replace hygrometer
Dryer controller displaying hygrometer
out of range
Hygrometer is reading an outlet dewpoint of
20°C or -100°C which is the
maximum limits of the hygrometer
Check hygrometer is functioning correctly
and not damaged
