Troubleshooting - Domnick Hunter PNEUDRI MiDAS Manual De Instrucciones

6.0 TROUBLESHOOTING

Problem Indication
Poor Dewpoint N/A
Electrical Fault Power LED 'OFF'
Failure to purge No depressurisation
and poor dewpoint
Outlet air flow Downstream
stops pressure drops
Constant Erratic air flow from
depressurisation exhaust
Reference to Known Misuse
Filters
• Opening inlet valve too quickly, causing initial high differential pressure across
filter element.
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.
Electric control box
• Incorrect wiring configuration by user or incorrect supply voltage.
• No fuse fitted or fuse blown.
Additional items
• Use of non-recommended components.
• Untrained, unauthorised maintenance / 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.
• Cartridges and filter / autodrain not changed when red LED is illuminated.
LED failure.
Probable Cause
Entrained Water
Excessive air flow demand
Inlet pressure too low
Excessive inlet air
temperature
Insufficient purge air flow
Exhaust silencers blocked
Contaminated desiccant
Cartridges not fitted
Hardware fault
Purge valve blocked or shut
Exhaust silencer blocked
No air supply to the
dryer
Damaged valve
14
Remedy
Check pre-filtration and pre-filtration drains
Check actual flow against rated flow of dryer
Check for recent additions to air system
Check against technical specification
Check against technical specification
Factory set for 6 barg (87 psi g) system pressure
Change by domnick hunter trained personnel
Eliminate source of contamination. Desiccant
change by domnick hunter trained personnel
Check and fit cartridges
Contact domnick hunter customer service
domnick hunter trained personnel to adjust
Change by domnick hunter trained personnel
Check compressor air supply to dryer
Check all pipework and fittings for leaks
Change by domnick hunter trained personnel