TROUBLESHOOTING SECTION 7
150
Water in System Inlet and outlet
connections are reversed.
(compressed air?)
Check inlet and outlet
connections.
This dryer is designed for air
flow in one direction only. Inlet
and outlet directions are
identified on the dryer.
Drain system is clogged
or inoperative.
Restore a free flow of
water condensate. Check
water evacuation.
Drain system may be a timed
solenoid valve, pneumatically
assisted or zero loss drain
which has to be adjusted in
accordance with values listed in
this the maintenance manual.
The Solenoid valve includes a
strainer that has to be
periodically checked and
cleaned. Membranes of
pneumatically assisted drain
have to be checked or replaced
every 6 months. Sullair zero
loss drain has to be cleaned
with soft water when needed.
Bypass system is open Check the valves Important: Bypass piping should
be installed around the dryer so
the dryer can be isolated for
service without shutting down
the air supply. During dryer
operation, valves must be set so
all air goes into the system.
Check tightness of the bypass
system.
Free moisture remains in
pipe lines.
Blow out the system Before the dryer is first started
all free moisture should be
blown out of the system.
Excessive air flow Check actual flow through
the dryer.
This dryer is designed for a
maximum air flow. If too much
air is pumped into the dryer,
water removal capacity may not
be sufficient, resulting in liquid
Carry-over downstream. Check
the rated flow of the air
compressor.
Excessive free moisture Check the separator and
drain system and
compressor after cooler
ahead of the dryer.
In some system there may be
an accumulation of free
moisture in the line ahead of the
dryer. If this moisture is pumped
into the dryer intermittently, the
water removal capacity may not
be sufficient. A water separator
should be installed in the line
before the dryer.
PROBLEM
POSSIBLE CAUSE REPAIR COMMENTS
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