NANO D1-C - Page 24

24
D3
heatless desiccant air dryer
7. trouble shooting
problem
problem caused solution
poor
performance
Insufcient inlet pressure Inlet pressure min 4 barg. If not adjust inlet pressure settings.
Electrical Fault
Ensure the power is on and the dryer front panel is illuminated;
check the dryer is cycling correctly.
Moist or contaminated desiccant Eliminate the cause of contamination. Replace desiccant – do not re-use.
Too high air consumption Ensure the performance of the dryer matches the required system air consumption.
Excessive inlet air temperature Check against technical specication.
Insufcient purge air
Purge incorrectly adjusted. Consult service personnel to adjust settings (Factory pre-set).
Exhaust silencer blocked Consult service personnel.
failure
to cycle
Controller not functioning correctly
Ensure the controller is powered up, check the on screen column status to ensure it is
powering the solenoid valves during operation
Controller not illuminated Check power supply to the dryer, check fuse and replace.
Insufcient inlet pressure
Inlet pressure should be a minimum of 4 barg (58psig) if not then adjust inlet pressure
settings.
Failure to de-pressurize
when cycling
Solenoid valve not functioning correctly; if there is power to the coil, replace valve.
Outlet ow stops Check inlet air supply
constant
depressurisation
Failure to initialize
Ensure that all isolation valves are fully closed, power up the generator, slowly open
the air inlet valve and allow the generator to cycle.
Erratic air ow from exhaust Faulty or damaged valves, carry out service
reference to known issue
• Opening the inlet valve too quickly - Valve should be opened slowly allowing the pressure to build up gradually.
• Inlet/outlet head pipe - Diameter too small.
• Pipe work unsupported.
• Inlet pipe work from low point in system, allowing bulk water to collect and enter the dryer.
Electrical controller
• Incorrect fuse tted or fuse blown. Check the plug and fuse located on bottom of the controller back plate inside the dryer front door.
Additional Items
• Use of non-authorised components.
• Untrained / unauthorised maintenance / installation personnel used.
• Increase in air consumption without relation to the ow capacity of the dryer.
• Purging the dryer with cleaning agents that could damage the components or the desiccant.
• Covers removed or loose during operation.
• Failure to carry out a service when indicated by the dryer.
• Do not allow the dryer to ow air unless powered up, switched on and cycling. Resulting effect could be dessicant
contamination; requiring replacement dessicant.