Air Dryer
5 Troubleshooting
Troubleshooting
5
5 - 1
Cause and countermeasure of errors
Should any problem occur, inspect the following table, and if the problem cannot be solved, shut off the power supply
and then contact one of our sales offices for further instructions.
Problem Probable
Causes
Remedy
Power cord or plug is in loosening
state or completely pulling out.
Perform proper connection on the power cord and plug.
Circuit breaker is OFF.
Confirm whether the proper 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 trips to OFF,
failure of electrical insulation may have occurred.
Remove the power supply and contact one of our
agents for further instructions.
Air dryer does not
operate and running
lamp does not light
on, even switch is
ON.
Connect the 3-phase power supply
incorrectly. (Applicable to products
using the 3-phase power supply.)
Replace 2 wires (R phase and T phase) among 3 each
other.
Installation place is poorly
ventilated. Ambient temperature
is too high.
Improve the ventilation system to lower the ambient
temperature.
Reset the protective circuit referring to “5-2 How to reset
the thermal relay and high pressure switch”.
The ventilation grilles are
obstructed by wall or clogged
with dust.
Install the air dryer more than 40cm away from the
wall.
Clean the ventilation grilles once a month.
Reset the protective circuit referring to “5-2 How to reset
the thermal relay and high pressure switch”.
Temperature of the compressed
air is too high.
Improve the ventilation system around air
compressor or make ambient temperature around air
compressor low to lower the temperature of
discharge from compressor.
Reduce the temperature of the compressed air by
installing an additional after-cooler after air dryer.
Reset the protective circuit referring to “5-2 How to reset
the thermal relay and high pressure switch”.
Running lamp
extinguishes and
compressor stops
during operation but
resumes normal
operation
illuminating the
lamp after a
period of time.
The power supply voltage changes
largely.
Install a power supply transformer and review the power
supply to keep the voltage adequate value.
Allowable fluctuation of the power supply voltage is
+-/10% at max. of the rated voltage.
Reset the protective circuit referring to “5-2 How to reset
the thermal relay and high pressure switch”.
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 40cm away from the
wall.
Clean the ventilation grilles once a month.
Evaporation
thermometer points
the value exceeding
a green range under
the condition where
no hot wind blows out
from the ventilation
port (exhaust port) at
right side face.
(Refrigerating
compressor stops
with light on.)
Temperature of the compressed
air is too high.
・
Improve the ventilation system around air
compressor or make ambient temperature around air
compressor low to lower the temperature of
discharge from compressor.
Reduce the temperature of the compressed air by
installing an additional after-cooler after air dryer.
5 - 1
