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8.1 - POOR DEWPOINT (cont)
VISUAL INDICATION
Exessive dust
carryover
High dewpoint alarm
POSSIBLE CAUSE
Desiccant fails to
regenerate
Moisture in sensor
block
CHECK
Contaminated
desiccant,
Faulty cycle.
Air flow over
sensor
Insufficient purge
air.
Entrained water
Inlet pressure
Inlet Temperature
Air flow demand
to high
Contaminated
desiccant
Faulty cycle
operation.
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REMEDY
Ascertain reason for
contamination.
Change desiccant.
Check dryer operation.
Adjust where necessary
Check air flow at sensor
adjust if required
Check for correct purge
rate, reset if necessary.
Check pre-fliters/drains.
Check inlet pressure
Check inlet Temperature
Check for peak demand,
exessive air flow
Check for oil carry over
etc, replace desiccant
Check dryer operation,
Adjust where necessary.
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