PVA PVA2000 - Open Loop Stepper Systems; Table 7 - PVA250, PVA750, and PVA2000 C Fault Diagnosis

Operation and Maintenance Manual Rev M(ii) 4/03
- 41 -
Operation Other Symptoms Possible Cause Corrective Action
• Reset the exhaust fan
overload relay.
The filter and
ducting are fine.
The motor
temperature is
normal.
The overload relay current
setting has been changed.
• Verify the current setting on
the overload relay. Please
refer to exhaust fan setup.
• Checked the tripped flag on
the overload relay. Push the
reset button to reset the
relay.
Open Loop Stepper Systems
Table 7 – PVA250™, PVA750, and PVA2000C Fault Diagnosis
Operation Other Symptoms Possible Cause Corrective Action
Turn the machine
ON. The operator
interface does not
have power.
Cables are loose or not
connected.
• Check the cable
connections. Correct any
loose connections.
The electrical
enclosure does not
have power.
The electrical enclosure is
open, so the electrical
enclosure safety switch is in
the open position.
• Close the electrical
enclosure.
The secondary disconnect if
off (PVA750™,
PVA2000C™ only).
• Check the secondary power
disconnect located on the
left side of the electrical
enclosure in the rear of the
machine.
Blown fuse.
• Check FU-2, FU-3, FU-4
which is located inside the
electrical enclosure.
Replace if necessary.
Homing the axes.
The end effector
moves past the
home sensor and
hits the hard stop.
Home sensor is out of
position or too far away
from the homing tab.
• Depress the EMERGENCY
STOP push button. Move
the axis by hand until the
homing tab moves into the
home sensor. The sensor
should be on. Loosen the
lock nut on the sensor and
readjust to .020” gap.
Sensor cable is loose or not
connected.
• Check the cable
connections. Correct any
loose connections.
Limit Error during
homing sequence.
Axes is not
moving.
The amp fuse(s) is blown.
• Check F1-F5 fuses located
on GPIO interface board.