NANO D2 - Troubleshooting

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heatless desiccant air dryer
D2
4. trouble shooting
problem problem caused solution
Poor dew-point
performance
Insufcient inlet pressure
4barg (58psig) minium inlet pressure required to operate, if not,
check and restore system pressure
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 cartridges
(do not re-use).
Excessive inlet air temperature Check against the technical specication
Insufcient purge air
Purge incorrectly adjusted, consult the service personnel to adjust
settings (factory pre-set). Consult Service Technician to adjust as per
site condition
Exhaust silencer blocked Replace exhaust silencer/mufer element.
Failure of dryer
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
insufcient inlet pressure
4barg (58psig) minium inlet pressure required to operate, if not,
check and restore system pressure
controller not illuminated Check power supply to the dryer, check fuse and replace.
failure to de-pressurize when cycling
Solenoid valve not functioning correctly; if there is power to the coil,
replace valve. Consult PLC display
outlet ow stops Check inlet air supply
failure to initialize dryer
Switch off and restart dryer. Ensure dryer is pressurized before
powering up to allow the dryer to initialize before operation.
erratic air ow from exhaust Faulty or damaged valves, carry out service