Domnick Hunter Pneudri Midas DAS 1, Instruction Manual, Page: 16 / 184

14
6.0 TROUBLESHOOTING
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.
Problem Indication Probable Cause Remedy
Poor Dewpoint N/A Entrained Water Check pre-filtration and pre-filtration drains
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 Check against technical specification
temperature
Insufficient purge air flow Factory set for 6 barg (87 psi g) system pressure
Exhaust silencers blocked Change by domnick hunter trained personnel
Contaminated desiccant Eliminate source of contamination. Desiccant
change by domnick hunter trained personnel
Cartridges not fitted Check and fit cartridges
Electrical Fault Power LED ‘OFF’ Hardware fault Contact domnick hunter customer service
Failure to purge No depressurisation Purge valve blocked or shut domnick hunter trained personnel to adjust
and poor dewpoint Exhaust silencer blocked Change by domnick hunter trained personnel
Outlet air flow Downstream No air supply to the Check compressor air supply to dryer
stops pressure drops dryer Check all pipework and fittings for leaks
Constant Erratic air flow from Damaged valve Change by domnick hunter trained personnel
depressurisation exhaust