Pressure sensors: error signal
(no measurement)
•
Electric connection
interrupted
•
Mechanical damage (e.g.
too high mounting torque)
•
Connection plugs not
connected
•
Crack due to incorrect
mounting
•
Internal defect
•
No supply voltage
•
Check connections
•
Check sensors
Pressure sensors: too high or
too low indication
•
Condense on connection
plugs
•
Faulty supply signal
•
Clogging or contamination
•
Sensor internally defect
•
Deviation due to ageing
•
Deviation due to incorrect
production
•
Check sensors
•
Replace defective parts
Pressure regulator: wrong
outlet pressure
Wrong setting
•
Check gauge of pressure regulator
•
Adjust pressure
Dew point sensor
malfunctioning
No direct feedback of dew point
Replace defective parts
Dew point sensor: no
measurement (error signal)
No direct feedback of dew point
•
Check sensors
Dew point sensor: incorrect
measurement
Dew point alarm generated too
early or too late
•
Check sensors
•
Replace defective parts
Faults and remedies, controller
Condition Fault Remedy
Doesn't read in pressure or
dew point
Software fault
•
Reprogram the controller
•
Check wiring
Doesn’t issue alarm(s) when
it should
•
Connection fault between
the controller and the
control room display
•
Reprogram the controller
•
Check wiring
Doesn't issue service warnings
when it should
Software fault Reprogram the controller
Keeps exhaust valves closed
(for purge of dryer)
•
Software fault
•
Communication fault
•
Reprogram the controller
•
Check wiring
•
Check solenoid
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