Sullair DHL-80 - Troubleshooting

User Manual US-EN DHL Regenerative Dryer w/SHDC-2300 touch screen controller
1000-4544 R01
Subject to EAR. ECCN EAR99 and related export control restrictions.
37
Part
Material
Gaskets and o-ring
Graphite, synthetic elastomer
Electric cables
Copper, PVC
Electric parts
PVC, Copper, Bronze
We recommend that you comply with the safety rules in force for the disposal of each type of
material. The adsorption material and the filter cartridge contains droplets of lubrication oil. Do
not dispose of these materials into the environment but rather deliver / dropoff at proper
disposal centers.
8.3 TROUBLESHOOTING
No.
Problem
Possible Cause – Suggested Action
1
Moisture in the
outlet air
The dryer is switched OFF – Turn it ON.
The dryer has just been commissioned and the adsorption material can contain humidity –
Use the dryer at a reduced flow of approximately 50% for at least two days and verify the
correct operations of the dryer.
The dryer does not perform the switching cycles – Refer to problem “Dryer towers do no
Switch”.
The inlet air is too hot – Restore the nominal conditions.
The inlet pressure is too low – Verify that the installed regeneration nozzle is for the rated
working pressure of the dryer. If you have doubts or problems, please contact your
distributor.
The inlet air flow rate is higher than the rate of the dryer – Reduce the flow rate to rated
inlet conditions of the dryer.
Inlet filter does not drain the condensate – Check the proper operation of the drain timer.
Electronic timer of the inlet filter drainer is not adjusted correctly – Reduce the drain pause
timer.
The pressure gauge of the tower under regeneration shows a pressure higher than zero /
silencers are clogged – Clean or replace them immediately.
Cyle time on SHDC-2300 Electronic Controller has been modified – Restore the time to
recommended timing.
Desiccant is completely saturated – Either regenerate desiccant completely or replace
desiccant.
2
Purge solenoid
valves are
never activated
Check for electrical supply or on/off switch failure.
Verify the electrical wiring
Verify the fuse on SHDC-2300 electronic controller.
The valve is blocked – Open and clean it.
The solenoid valve has gone bad – Replace it.
3
Dryer towers
do not switch
correctly
Solenoid valve PVA and / or PVB are never activated – See specific point.
Inlet and / or outlet valve is blocked or inlet solenoid is not working – Carry out
maintenance operation.
Check the purge exhaust mufflers and make sure it is clean – Replace if required.
4
All the inlet air
is discharged
through the
purge exhaust
mufflers
The dryer does not perform the switching cycles – Refer to Step 2.
The purge solenoid valve PVA and / or PVB is blocked – Open and clean it.
The SHDC-2300 electronic controller always supplies solenoid valve PVA and / or PVB –
Check the wiring and replace if necessary.
The cycle times on the SHDC-2300 electronic controller have been changed – Restore to
original settings.
Regeneration nozzle is clogged – Open and clean it.
5
Liquid at the
purge exhaust
mufflers
Humidity in outlet air – Refer to “Moisture in the Outlet Air” to resolve the issue.
6
Hi-Dew point
The probe of the Dew Point meter (optional) detects a high dew point, for one of the