Vestil SWA-48 - Manual (Page 13)

13
T
ROUBLESHOOTING
G
UIDE
— SWA-48, POW-CAR
Warning: Before performing any task, always disconnect the power supply.
Consult the manufacturer for problems at time of installation, or for any problems not addressed below.
Problem
• The turntable does not rotate.
• The turntable will not rotate without
assistance, rotates slower when
loaded, or will not achieve
maximum speed.
• The powered mast motor or control
enclosure hums, chatters, or
buzzes, and the film carriage does
not move, or it moves only slowly.
• The powered mast carriage will not
raise or lower when either
push-button is pressed.
• Powered mast must carriage will
raise but it will not lower.
Possible Cause(s)
• No power supply voltage.
• Speed control at its slowest setting
• No control signal from the foot
switch.
• Motor controller fault, or defective
motor controller.
• Broken or slipping belt.
• See the last paragraph above.
• Excess voltage drop to motor, due to
power wire size too small, wire run to
long, or incoming voltage too low.
• Damage to the mast or carriage.
• Low control voltage or bad connection
in control circuit.
• See as last item above.
• Transformer fuse is blown.
• No power supply voltage.
• Mast limit switch is engaged or bad.
• Control relay 1 CR (left side in the
enclosure) contact is burnt.
• Control relay 1 CR has become loose.
• Control relay 2 CR has become loose.
• Control relay 2 CR is defective.
• Bad connection in control circuit.
• Physical blockage of the structure.
Action
• Check for 115V at the outlet into
which the machine is connected.
Find cause of power supply loss
before resupplying power.
(Note: if the turntable cord is
plugged into the pigtail at the
powered mast's enclosure, verify
that the powered mast cord is
plugged into an outlet.)
• Increase the turntable speed at the
knob on the front of the motor
controller.
• Check the foot switch and its cable
for continuity.
• Check the display on the controller
for a fault code. Contact the factory.
• If the fan on the drive motor is
spinning, lift the mast end of the
machine to inspect the belt.
• See the last paragraph above.
• Check power supply for adequacy.
Check incoming voltage while the motor
is running. Correct by installing a circuit
with larger wire, eliminating extension
cords, or installing a buck/boost
transformer.
• Visually inspect the carriage and mast
for signs of damage or excessive wear.
• Verify 24 VAC at transformer
secondary. Inspect all wires and
connections in the mast control
enclosure for looseness, etc.
• See last paragraph above.
• Test with meter; replace if bad (Be sure
to replace with the same fuse type and
ampere value.)
• See first item at the top of the page.
• Inspect and test switch. Replace if bad.
• Inspect contact. Clean contact or
replace relay if burnt. Check for 115V at
the motor relay.
• Verify that the relay is firmly in place.
• See last paragraph above.
• Inspect and test control relay 2 CR.
Replace if bad.
• Test all parts of circuit with meter.
• Inspect for foreign material or
objects that might block the
carriage path.