Hitachi SB10Y1 Instruction Manual - Page 15

Troubleshooting Guide

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English TROUBLESHOOTING GUIDE WARNING • To avoid injury from an accidental start, turn the switch OFF and remove the plug from the power source before making any adjustments. • All electrical or mechanical repairs should be done only by qualified service technicians. Contact Hitachi Authorized Service Center. GENERAL PROBLEM Motor will not start. Motor will not start; fuses blown or circuit breakers are tripped. Motor fails to develop full power (power output of motor decreases rapidly with decrease in voltage at motor terminals). Motor overheats. Motor stalls (resulting in blown fuses or tripped circuit breakers). Machine slows down while operating. Abrasive belt runs off top wheel. Dust collection not working. PROBABLE CAUSE 1. Low Voltage. 2. Open circuit in motor or loose connections. 3. Defective switch. 4. Defective capacitor. 1. Short circuit in line cord or plug. 2. Short circuit in motor or loose connections. 3. Incorrect fuses or circuit breakers in power line. 1. Power line overloaded with lights, appliances and other motors. 2. Undersize wires or circuits too long. 3. General overload of power company's facilities. Motor overloaded. 1. Short Circuit in motor or loose connections. 2. Low voltage. 3. Incorrect fuses or circuit breakers in power line. 4. Motor overload. 1. Applying too much pressure to workpiece. 2. Not enough tension on V-Belt. Not tracking properly. REMEDY 1. Check power line for proper voltage. 2. Inspect all lead connections on motor for loose or open connection. 3. Replace switch. 4. Replace capacitor. 1. Inspect line cord or plug for damaged insulation and shorted wires. 2. Inspect all lead connections on motor for loose or shorted terminals or worn insulation on wires. 3. Install correct fuses or circuit breakers. 1. Reduce the load on the power line. 2. Increase wire sizes, or reduce length of wiring. 3. Request a voltage check from the power company. Reduce load on motor. 1. Inspect connections in motor for loose or shorted terminals or worn insulation on lead wires. 2. Correct the low line voltage conditions. 3. Install correct fuses or circuit breakers. 4. Reduce load on motor. 1. Ease up on pressure. 2. Increase tension on V-Belt. See Schematic A, turn bolt ref. 0032 clockwise. See operation "Adjusting Belt Tracking". 1. Dust collection bag full. 2. Belt loose or broken. 3. Impeller loose or broken. 1. Empty dust collection bag. 2. Replace belt. 3. Replace impeller. - 15 -

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English
– 15 –
•
To avoid injury from an accidental start, turn the switch OFF and remove the plug from the power source before making
any adjustments.
•
All electrical or mechanical repairs should be done only by qualified service technicians. Contact Hitachi Authorized
Service Center.
GENERAL
TROUBLESHOOTING GUIDE
PROBABLE CAUSE
1. Low Voltage.
2. Open circuit in motor or loose
connections.
3. Defective switch.
4. Defective capacitor.
1. Short circuit in line cord or plug.
2. Short circuit in motor or loose
connections.
3. Incorrect fuses or circuit breakers
in power line.
1. Power line overloaded with lights,
appliances and other motors.
2. Undersize wires or circuits too long.
3. General overload of power company’s
facilities.
Motor overloaded.
1. Short Circuit in motor or loose
connections.
2. Low voltage.
3. Incorrect fuses or circuit breakers
in power line.
4. Motor overload.
1. Applying too much pressure to
workpiece.
2. Not enough tension on V-Belt.
Not tracking properly.
1. Dust collection bag full.
2. Belt loose or broken.
3. Impeller loose or broken.
PROBLEM
Motor will not start.
Motor will not start;
fuses blown or circuit
breakers are tripped.
Motor fails to develop full
power (power output of
motor decreases rapidly
with decrease in voltage
at motor terminals).
Motor overheats.
Motor stalls (resulting in
blown fuses or tripped
circuit breakers).
Machine slows down
while operating.
Abrasive belt runs off
top wheel.
Dust collection not working.
REMEDY
1. Check power line for proper voltage.
2. Inspect all lead connections on motor for loose or
open connection.
3. Replace switch.
4. Replace capacitor.
1. Inspect line cord or plug for damaged insulation
and shorted wires.
2. Inspect all lead connections on motor for loose or
shorted terminals or worn insulation on wires.
3. Install correct fuses or circuit breakers.
1. Reduce the load on the power line.
2. Increase wire sizes, or reduce length of wiring.
3. Request a voltage check from the power company.
Reduce load on motor.
1. Inspect connections in motor for loose or shorted
terminals or worn insulation on lead wires.
2. Correct the low line voltage conditions.
3. Install correct fuses or circuit breakers.
4. Reduce load on motor.
1. Ease up on pressure.
2. Increase tension on V-Belt. See Schematic A,
turn bolt ref. 0032 clockwise.
See operation “Adjusting Belt Tracking”.
1. Empty dust collection bag.
2. Replace belt.
3. Replace impeller.
WARNING