18
Self diagnosis via LEDs on the circuit board:
•
Green LED
flashing
⇒
Supply voltage applied / Microprocessor is active
•
Red LED
constantly lit
⇒
Humidity sensor element damaged
flashing
⇒
Humidity sensor element accruing moist (condensation!)
Self diagnosis via display (where available):
Error 1
⇒
Humidity sensor element damaged
Error 2
⇒
Humidity sensor element moistened (condensation!)
Error 3
⇒
Temperature sensor element damaged
Error 4
⇒
Temperature input short circuit
Definitions:
•
Error
possible cause
⇒
Measures / Help
•
Display shows incorrect values
Error during re-adjustment of the transmitter
⇒
Reset to factory calibration and repeat the calibration routine
Filter soiled
⇒
Replace filter
Sensor defective
⇒
Replace sensor
Output configured incorrectly
⇒
PC - Software
•
Long response time
Filter soiled
⇒
Replace filter
Incorrect filter type
⇒
Filter type should match the application
•
Transmitter failure
no supply voltage
⇒
Check wiring and supply voltage
⇒
only green LED is illuminated continuously
⇒
Electronics defect
⇒
contact the manufacturer
•
High humidity values - red LED blinks
Dew (condensation) in sensor probe head
⇒
Dry probe head and check the sensor probe mounting type
Incorrect filter type (e.g. storage of humidity after stainless steel sintered filter condensation)
⇒
Filter type should match the application
8.3
Self diagnosis and error messages:
Hardware
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