Mechanical And Electrical Problems - Powermatic PM1800B Operating Instructions And Parts Manual

16.2 Mechanical and Electrical Problems

Table 4
Trouble
Machine will not
start/restart or
repeatedly trips circuit
breaker or blows
fuses.
Probable Cause
No incoming power.
Cord damaged.
Overload automatic reset has not been
reset.
Band Saw frequently trips.
Building circuit breaker trips or fuse
blows.
Switch or motor failure
distinguish).
Motor overheated.
Motor failure.
Miswiring of the unit.
Remedy
Verify machine is connected to power
source, and that the safety key is
installed on the switch.
Replace cord.
Re-set the overload by pushing in
completely the OFF (red) button on the
magnetic switch. Allow a few minutes for
the machine to cool. If problem persists,
check amp setting on the motor starter.
One cause of overloading trips which are
not electrical in nature is too heavy a cut.
The solution is to reduce feed pressure
into the blade. If too heavy a cut is not
the problem, then check the amp setting
on the overload relay. Match the full load
amps on the motor as noted on the motor
plate. If amp setting is correct then there
is probably a loose electrical lead. Check
amp setting on motor starter.
Verify that band saw is on a circuit of
correct size. If circuit size is correct,
there is probably a loose electrical lead.
Check amp setting on motor starter.
If you have access to a voltmeter, you
can separate a starter failure from a
motor failure by first, verifying incoming
voltage
checking the voltage between starter
(how to and motor at 220+/-10. If incoming
voltage is incorrect, you have a power
supply problem. If voltage between
starter and motor is incorrect, you have
a starter problem. If voltage between
starter and motor is correct, you have a
motor problem.
Clean motor of dust or debris to allow
proper air circulation. Allow motor to cool
down before restarting.
If electric motor is suspect, you have two
options: Have a qualified electrician test
the motor for function or remove the
motor and take it to a qualified electric
motor repair shop and have it tested.
Double check to confirm all electrical
connections are correct. Refer to wiring
diagrams
corrections.
33
at 220+/-10 and second,
to make any needed