Type of Problem
Cause
Corrective Action
Electromagnetic
switch turns off
Capacity of the
electromagnetic switch is
inadequate
Correct or replace with a properly
sized the electromagnetic switch.
Voltage has dropped or
become unbalanced
Contact the local power utilities
company.
Foreign objects have been
inhaled, causing restriction
to the impeller.
Contact the local Hitachi
distributor for repair.
Motor has overheated
Ambient temperature in the
installation room is
excessively high.
Improve the ventilation to the
room to lower the ambient
temperature.
Contact the local Hitachi
distributor for repair.
Stator coil short circuit
Vortex Blower is
making a droning
sound
Improper gap spacing
between the stator and the
coil.
Contact the local Hitachi
distributor for repair.
If the sound is
Metallic
,
there may be impeller
contact.
Contact the local Hitachi
distributor for repair.
Vortex Blower is
making unusual or
excessive noise
If the sound is
Rumbling
,
there may be damage to the
ball bearing.
Contact the local Hitachi
distributor for repair.
There is a leak in the
piping.
Firmly tighten all joints.
Vortex Blower has
poor airflow
There is a clog in the piping.
Inspect and remove restrictions to
improve airflow.
V
ortex B
low
er r
otates
Rotation is reversed
Power supply connection is
incorrect or backwards.
Change the connections of two of
the three wires of the three-phase
power supply.
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Summary of Contents for E-U Series
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