Chapter
9
Malfunctions
Before
starting
troubleshooting:
Turn
off
the
main
switch.
Secure
the
main
switch
so
that
it
cannot
be
switched
back
on.
CAUTION
Rotating
fan
impeller
Risk
of
severe
injury
to
limbs
through
contact
with
the
part.
Wait
until
the
fan
has
stopped
(approximately
5
minutes).
Malfunction
Possible
cause
Troubleshooting
01
Extraction
power
too
low
Suction
line
clogged
Remove
the
blockage.
Suction
line
not
leak
‐
tight
Seal
the
leak.
Pipe
sections
excessively
throttled
Check
the
valve
position.
Inspection
hatch
open
Close
the
inspection
hatch.
Exhaust
line
clogged
Remove
the
blockage.
Heavy
soiling
inside
device
Clean
the
device
with
a
high
‐
pressure
cleaner.
Water
level
too
high
Lower
the
water
level
and
check
the
level
regulator.
Soiling
of
ventilator
impeller
Clean
and
rebalance
if
necessary.
Fan
running
in
wrong
direction
Reverse
the
motor.
Defective
compensator
Replace
the
compensator.
02
Dust
escaping
from
air
outlet
port
Heavily
reduced
suction
performance
Check
the
valve
positions;
the
air
quantity
must
not
be
excessively
throttled.
Water
level
too
low
Check
the
discharge
valve,
level
regulator,
and
water
supply.
Raise
the
water
level.
Water
too
concentrated
Drain
the
water
trap,
clean
it,
and
fill
it
with
fresh
water.
Dust
poorly
wettable
Add
wetting
agent
FC54
by
WAFORIT
to
the
water.
03
Water
escaping
from
air
outlet
port
Heavily
increased
air
performance
Check
the
valve
positions,
throttle
the
air
quantity,
and
check
the
suc
‐
tion
line
and
device
for
leaks
and/or
open
inspection
hatches.
Water
level
too
high
Check
the
level
regulator.
Lower
the
water
level.
Heavy
soiling
inside
device
Clean
the
device
with
a
high
‐
pressure
cleaner.