6189902 – Rev. C 07.2012
7
GB
Trouble Shooting
Problem
Possible Cause(s)
Possible Solution(s)
Dryer Performance
Reduction
Excess Inlet Temperature or
Humidity
Check that all fans are running when the system compressor is running.
Make sure that the system is in an environment that has an ambient
temperature and relative humidity within O & M specifications.
Insufficient Inlet Pressure
Make sure that all filters before the dryer are not clogged. This includes
the compressor intake filters. If needed adjust the pressures switch to the
maximum pressure on the product label.
Moist Desiccant cartridges
Check the run hours on each dryer column. If run hours are over O&M
specifications, change the dryer cartridges with JUN-AIR specified service
kits. Make sure the dryer cartridges are installed with the dryer handle on
the top.
Leaking Plumbing
With the system running, check all installed fittings on the dryer for leaks
using soapy water. If any leaks are detected, tighten the leaky fittings and
recheck.
Drain Bottle is full of water
Empty the drain bottle.
Dryer Drain tubing is kinked
Make sure that the drain tubing from the dryer to the drain bottle is not
kinked.
Damaged o-rings or gasket seal
Visually check to see that all o-rings and gasket seals are in place and not
damaged. Replace as needed.
Damaged ball valve
Visually check to see that the ball valves are in place and not damaged.
Replace as needed.
Dryer does not cycle
PLC Controller not functioning
correctly
Check that the PLC controller is ON.
Insufficient Inlet Pressure
Make sure that all filters before the dryer are not clogged. This includes the
compressor intake filters.
Solenoid valve not functioning
correctly
If the PLC controller is ON, audibly verify that the dryer exhaust solenoids
are cycling every 2 - 3 minutes. If not, check electrical connections and
replace solenoid valve if necessary.
Dryer is Leaking Water
Incorrect Fittings Installed
Check to make sure that the fittings used in the dryer are original JUN-AIR
fittings. Call an authorized JUN-AIR distributor for replacement fittings.
Leaking Plumbing
With the system running, check all installed fittings on the dryer for leaks
using soapy water. If any leaks are detected, tighten the leaky fittings and
recheck.
Solenoid is purging
Check to make sure all tubing from the solenoid valves are securely
fastened to the drain bottle and that there are no leaks in the tubing.
Drain Bottle is full of water
Empty the drain bottle.
Dryer is Noisy
Solenoid is purging
No issue.
