Problem
Indication
Probable cause
Remedy
Poor Dewpoint
Crystals go pink in outlet
Entrained water
Check pre-filtration and pre-filtration drains
moisture indicator
Excessive air flow demand
Check actual flow against rated flow of dryer
Check for recent additions to air system
Inlet pressure too low
Check against technical specification
Excessive inlet air temperature
Check against technical specification
Insufficient purge air flow
Factory set for 6 bar g (87 psig) system
pressure.
Sullair trained personnel to adjust
Exhaust silencers blocked
Change by Sullair trained personnel
Contaminated desiccant
Eliminate source of contamination. Desiccant
change by Sullair trained personnel
Electrical fault
Flashing Yellow LED
Hardware fault
Contact Sullair customer services
High differential pressure Pressure gauges
Excessive outlet flow
Check and regulate air demand
Failure to purge
No depressurisation
Purge valve blocked or shut.
Sullair trained personnel to adjust
and poor dewpoint
Exhaust silencers blocked
Change by Sullair trained personnel
Outlet air flow stops
Downstream pressure drops Electrical fault
Contact Sullair customer services
Yellow LED “OFF”
Blown fuse in plug
Change by competent personnel
Constant depressurisationErratic air flow from exhaust Damaged valve
Change by Sullair trained personnel
7
8. FAULT DIAGNOSIS TABLE
Filters
Lack of filtration.
Installation of inlet filters remote from the dryer inlet head, allowing possible condensation to occur
between filters and dryer.
Blow down valve upstream of filters causing back flow / possible collapse of filter element.
Installing filters in wrong flow direction.
Opening inlet valve too quickly, causing initial high differential pressure across filter element.
Differential pressure gauge/indicator fitted wrong way around giving false differential pressure reading.
Combining drain pipes from filters to a single drain valve.
Inlet / outlet head
Pipe diameter too small.
Pipework unsupported.
Inlet pipework taken from low point of manifold range, allowing bulk water intrusion into the dryer.
Control box/electric’s
Incorrect wiring configuration by user, or incorrect supply voltage.
No neutral or earth wire fitted by user to dryer.
Additional Items
Use of non recommended componentry.
Untrained / unauthorised maintenance or installation personnel used.
Subsequent increase in air consumption without relation to dryer flow capacity.
Purging of pneumatic system and dryer with cleaning agents that have the potential to damage desiccant
material.
Covers removed or loose during operation.
9. KNOWN MISUSE
