Page 22
16. TROUBLESHOOTING
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 fitted or fuse blown. Check the plug and fuse located on top of the controller back plate inside the dryer
front cover.
Additional Items
Use of non-authorised components.
Untrained / unauthorised maintenance / installation personnel used.
Increase in air consumption without relation to the flow 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 flow air unless powered up, switched on and cycling. Resulting effect could be
cartridge contamination; requiring replacement cartridges.
Problem
Problem Cause
Solution
Poor dew point
performance
1. Insufficient inlet pressure
1. Inlet pressure min 4 barg. If not adjust inlet pressure
settings.
2. Electrical Fault
2. Ensure the power is on and the dryer front panel is
illuminated; check the dryer is cycling correctly.
3. Moist or contaminated desiccant
3. Eliminate the cause of contamination. Replace cartridges
– do not re-use.
4. Too high air consumption
4. Ensure the performance of the dryer matches the re-
quired system air consumption.
5. Excessive inlet air temperature
5. Check against technical specification.
6. Insufficient purge air
6. Purge incorrectly adjusted. Consult service personnel to
adjust settings (Factory pre-set).
7. Exhaust silencer blocked
7. Consult service personnel.
Failure of dryer to cycle
8. Controller not functioning correctly
8. Ensure the controller is powered; check the on screen
column status to ensure it is powering the solenoid valves
during normal cyclic operation.
9. Controller not illuminated
9. Check power to unit & fuse: T2A 250V (located at Fig
8.A).
10. Insufficient inlet pressure
10. Inlet pressure = min 4 barg. If not adjust inlet pressure
settings.
11. Failure to de-pressurise when cycling
11. Solenoid valve not functioning correctly; if there is
power to the coil, replace valve. A correctly working valve
outputs an audible click when it energises.
12. Outlet flow stops
12. Check inlet air supply.
Constant
depressurisation
13. Failure to initialise dryer
13. Switch off and restart dryer. Ensure dryer is pressurised
before powering dryer to allow dryer to initialise before
commencing operation.
14. Erratic air flow from exhaust
14. Faulty or damaged valve; service required.
