HUGFEN C31-2 - Manual (Page 30)

Fault Finding continued
PROBLEM CAUSE SYMPTOM REMEDY
Fan motor stop working Every LED at electronics
control board doesn’t light so
its similar to no electric in
circuit Repair or change the fan
The room temperature is too
high The room temperature is
higher than appropriate
temperature to work. Adjust temperature in the
room to the appropriate
range or follow by the
manual such as to
increase flow rate air
There’s circulate hot air in the
room causes from wrong
installation The room temperature is too
high To change the position of
air dryer to rearrange the
surroundings to limit
circulate air
The fins of refine unit were
dirty. At The display always show
>4 °C. Clean the refine unit fins
Refine unit was clogged. At The display always show
>4 °C.
Clean the refine units
Room has rather high
temperature and fan has invert
spin.( In case 3 phases used) The cooling air had pass on
fan and refine unit. Invert the electric phase
E
High
pressure
switch stop
working and
have to
control by
manual
The refrigerant leaked. Temperature of the dew point
too high (Moisture might be
observed near entrance).
Check for leaking marks
Air pressure too low, inlet
temperature too high, ambient
temperature too high. The compressor stopped
before reached the fixed
balancing point value.
Compressor restarts again
after 2-3 minutes because the
pressure is back to normal
Recommend to turn off
the machine.
F
Low pressure
Switch stops
working.
Refrigerant pressure too low,
refrigerant leak -Top of the compressor is very
hot
Compressor stops then
restarts after 2~3 seconds. Check for leaking marks
and refill the refrigerant
G
Prevent
compressor
shut down
High pressure switch stopped
working -Top of the compressor is very
hot
-Compressor stopped working Ensure the high
temperature switch is in
good condition; if not
then change a new one.