Hitachi E-U Series, Instruction Manual, Page: 21 / 24

8. TROUBLESHOOTING
Type of Problem Cause Corrective Action
Terminal short circuit Repair or replace the wiring.
Power switch turns off
Stator coil short circuit
Contact the local Hitachi
distributor for repair.
Contact defect in switch Replace the contact or switch.
Power supply has been
damaged.
Inspect and fix the power as
necessary.
Phase failure in the power
supply.
Inspect and fix the power as
necessary.
Stator coil is damaged.
Contact the local Hitachi
distributor for repair.
Damaged ball bearing has
caused contact between the
rotor and the stator.
Contact the local Hitachi
distributor for repair.
Foreign objects have been
inhaled, causing restriction
to the impeller.
Contact the local Hitachi
distributor for repair.
Vortex Blower is
making a droning
sound
Impeller and the casing
come in contact at the side
cover.
Contact the local Hitachi
distributor for repair.
Power supply has been
damaged.
Inspect and fix the power as
necessary.
Phase failure in the power
supply.
Inspect and fix the power as
necessary.
Stator coil is damaged.
Contact the local Hitachi
distributor for repair.
Contact defect in switch Replace the contact or switch.
Power failure
Contact the local power utilities
company.
V
ortex B
low
er
do
es n
ot r
otate
Vortex Blower makes
no sound
Thermal protector
failure
Check the thermal protector and
verify that it is not actuated.
Turn off the power supply, fix the
problem and restart the Vortex
Blower after the motor has cooled
down.
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