HUGFEN C31-2 - Manual (Page 29)

Fault Finding continued
PROBLEM CAUSE SYMPTOM REMEDY
Compressed air flow rate too
high. Pressure downstream from
the dryer lower than the
expected value. Reduce the compressed
air flow rate.
Condensate is Frozen. Pressure downstream from
the dryer lower than the
expected value.
See note C.
B
Excessive
drop in
compressed
air pressure.
Exchanger Tubes soiled by
impurities in the compressed
air. Pressure downstream from
the dryer lower than the
expected value... Wash the heat
exchanger tubes with a
non-aggressive detergent
solution. Check the filter
upstream from the dryer.
The condensate has frozen
and blocked the passage as
the probe is incorrectly
positioned. Compressed air does not flow
through the dryer. Position the probe in the
centre of the CDT heat
exchanger.
The condensate has frozen
and blocked the passage as
the set point is programmed
too low. After starting the compressor,
value 0 is reached in less than
2 minutes. Increase the set point
value.
C
Compressed
air does not
flow through
the dryer.
The condensate has frozen
and blocked the passage as
the electronic controller has
failed. The compressor stops.
The compressor does not stop
even if the digital display
panel indicates 0 several
minutes. Change the electronic
board
Solenoid valve doesn’t work There’s no water or air to
drain when VALVE button’s
pressed
Change the solenoid coil
The draining system was
clogged T strainer was dirty Clean the T strainer
The working period of solenoid
valve is not long enough There’s no water or air to
drain when VALVE button’s
pressed To make the period of
solenoid valve working
longer
Solenoid valve was clogged There’s no water or air to
drain when VALVE button’s
pressed
To clean solenoid valve
Relay on electronics control
board is not working. To use volt metre to check
that the relay surface will be
closed to each other or not
when VALVE button‘s
pressed. Change the electronics
control board in case
relay is not working.
D
There’s liquid
at air dryer
outlet side
The tube system is in cold air
which the temperature is lower
than refined temperature of air
under pressure and the tube is
unprotected, in this case any
liquid will be refined at outside
of tube No problem with the air dryer
but with the outside
environment To protect the tube that
is in low temperature
area.