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
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 5 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.
Although the
switch with lamp
is turned on, the
run lamp does
not light up and
the product does
not start
operating.
The Three-phase power supply is
connected incorrectly.
- Swap over the connection of 2 of the 3 wires (R and T
phases).
Water-cooled condenser is dirty.
- Clean the cooling water side once a month.
The cooling water temperature is
high.
- Reduce the cooling water temperature as much as
possible.(Reconsider the cooling tower.)
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.
- Refer to “5.2 Reset of protective equipment” and reset the
protective circuit.
The lamp goes
off and the
compressor for
refrigeration
stops.
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.
- Refer to “5.2 Reset of protective equipment” and reset the
protective circuit.
Water-cooled condenser is dirty.
- Clean the cooling water side once a month.
The cooling water temperature is
high.
- Reduce the cooling water temperature as much as
possible.(Reconsider the cooling tower.)
When the cooling
water is not
flowing, the
compressor for
refrigeration has
stopped with the
lamp lit up.
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
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