5. Troubleshooting
5 - 1
5.1 Troubleshooting
If any error is found in the product, investigate the following points. If the error cannot be solved, turn off the
power supply and contact your local supplier or SMC sales representative.
Trouble Possible
cause
Remedy
Although the
switch with lamp
is turned on, the
lamp does not
light up and the
product does not
start operating.
The power supply cable has been
loosened or disconnected.
- Reconnect it firmly.
The ground fault circuit
interrupter is not turned on.
Check the capacity of the ground fault circuit interrupter.
- Check the product was not restarted within 3 minutes after
being stopped.
- Turn on the ground fault circuit interrupter and try to
operate.
If the ground fault circuit interrupter turns back off, the
insulation failure of the product is suspected. Turn off the
power supply and contact SMC.
Running lamp
extinguishes
and compressor
stops during
operation but
resumes normal
operation
illuminating the
lamp after
aperiod of time.
The product is installed in an
inappropriate location.
Ambient temperature is excessive.
- Improve ventilation condition and reduce the ambient
temperature as much as possible.
The ventilation port is obstructed
by a wall or clogged with dust.
- Keep the product 600mm or more away from the
surrounding walls.
- Clean the ventilation ports once every month.
The compressed air temperature is
too high.
- Improve the ventilation in the location where the air
compressor is installed, or decrease the ambient
temperature to allow the discharge air temperature of the
air compressor to go down.
- Install an aftercooler after the air compressor to reduce the
temperature.
The fluctuation of the power supply
voltage is too large.
- Install a power supply transformer or use a different power
supply to provide appropriate voltage.
- The fluctuation of the power supply voltage should be kept
/-10% of the rated voltage.
The evaporation
thermometer is
over the green
area without hot
air coming from
the ventilation
port (exhaust
port).
(The compressor
for refrigeration
has stopped with
the lamp lit up.
The product is installed in an
inappropriate location.
Ambient temperature is excessive.
- Improve ventilation condition and reduce the ambient
temperature as much as possible.
The ventilation port is obstructed
by a wall or clogged with dust.
- Keep the product 600mm or more away from the
surrounding walls.
- Clean the ventilation ports once every month.
The compressed air temperature is
excessive.
- Improve the ventilation in the location where the air
compressor is installed, or decrease the ambient
temperature to allow the discharge air temperature of the
air compressor to go down.
I
t ll
ft
l
ft
th
i
t
d
th
The fluctuation of the power supply
voltage is too large.
- Install a power supply transformer or use a different power
supply to provide appropriate voltage.
- The fluctuation of the power supply voltage should be kept
/-10% of the rated voltage.
The built-in overload relay of the
compressor for refrigeration has
started.
- Check the product was not restarted within 3 minutes after
being stopped.
Troubleshooting
５
