NANO NXC Series, User Manual

Page: 30 / 64

30
cycling refrigerated air dryer l
R
1
problem cause symptom solu on
F. Low pressure (LP)
Pressure switch cuts
in.(auto.)
Refrigerant leak
The compressor stops before
cooling the thermal mass to the
pre-set value or compressor stop
and start many mes.
Have the circuit checked for leaks by a
refrigera on technician and eliminate
them.
Have a refrigera on technician Re
fi ll
the circuit.
A er each LP switch cut, no display
during 2 minutes and compressor
start automa cally 2 minutes a er.
On fi rst start-up if the ambient
temperature is too low and the
thermal mass is at the same
temperature as the ambient
temperature.
Same as above
Correct the ambient temperature
by raising it above the minimum set
point value.
G. Compressor
protec on system
cuts in
Compressed air fl ow rate and
temperature too high and high
ambient temperature at the same
me.
•The compressor head and body
are very hot.
•The compressor stops and tries to
start up again a few seconds later.
Shut the compressor down and adjust
compressed air
fl ow rate and pressure
to within the dryer limits.
Wait a few minutes before star ng up
the compressor again
Check and replace the HP Pressure
switch if necessary.
Compressed air fl ow rate and
temperature too high and
refrigera ng circuit empty.
•The compressor head and body
are very hot.
•The compressor stops and tries to
start up again a few seconds later. Have the circuit checked for leaks by
a refrigera on technician, re
fi ll the
circuit.
Check and replace the HP Pressure
switch if necessary.
The HP Pressure switch has failed. Same as above
Check and replace the HP Pressure
switch if necessary.
E. Sensor protec on
system cuts in
The compressor has stopped the
control board display show 00 and
the
fi rst digit point is blinking.
The temperature sensor is not
connected or short circuited.