5 Troubleshooting
5 - 1
5
Troubleshooting
Should any problem occur, inspect the following table, and if the problem cannot be solved, shut off the power
supply and then contact an SMC authorized dealer for further instructions.
Problem
Probable Causes
Remedy
Air dryer does not
operate and run
lamp does not light
up, when the switch
is ON.
Power cord or plug is loose or
not connected to the power
source.
Perform proper connection on the power cord and
plug.
Circuit breaker is OFF.
Confirm whether the correct capacity of the circuit
breaker is used.
It is not possible to restart the air dryer within 3
minutes after shutdown. Wait for 3 minutes before
restarting.
Resume the operation after resetting the circuit
breaker to ON. If the circuit breaker still trip to OFF,
failure of electrical insulation may have occurred.
Remove the power supply and contact the factory for
further instructions.
During normal
operation the
Running lamp goes
off and the
compressor stops.
After a period of
time normal
operation resumes.
Installation place is poorly
ventilated.
Ambient temperature is too high.
Improve the ventilation around the unit to lower the
ambient temperature.
The ventilation grilles are
obstructed by wall or clogged
with dust.
Install the air dryer more than 0.6m away from the
wall.Clean the ventilation grilles once a month.
Temperature of the
Compressed air is too high.
Improve the ventilation around the unit to lower the
ambient temperature.
Reduce the temperature of the compressed air by
installing an additional aftercooler before the air
dryer.
Supply voltage is not correct.
Ensure the correct voltage is supplied to the unit
Evaporation
thermometer
indicates higher
than green zone.
Installation place is poorly
ventilated.
Ambient temperature is too high.
Improve the ventilation system to lower the ambient
temperature.
The ventilation grilles are
obstructed by wall or clogged
with dust.
Install the air dryer more than 0.6m away from the
wall.Clean the ventilation grilles once a month.
Temperature of the
compressed air is too high.
Improve the ventilation around the air compressor or
make
ambient
temperature
around
the
air
compressor lower to reduce the temperature of
discharge from compressor.
Reduce the temperature of the compressed air by
installing an additional after-cooler after the air dryer.
Moisture
occurs
downstream of the
compressed
air lines.
Bypass valve of air dryer is not
fully closed.
Close the valve completely.
Drain is not discharged from auto
drain properly.
Check if the drainpipe has fluid trap.
Check auto drain function.
Check auto drain strainer.
Moisture from separate air
circuit that is without air dryer.
Install additional air dryer on the line that does not have
one.
Separate two lines not to converge.
Large pressure
drop
IN/OUT valve on the air dryer
side is not fully opened.
Open IN/OUT valve fully.
Filter that is installed separately
in compressed air line is clogged.
Replace the filter element.
(Follow the instruction manual of each individual
device.)