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10
Technical Troubleshooting
General Troubleshooting
Terms
Only a qualified technician should perform
electrical troubleshooting activities. This unit
operates on 115V or 230V electrical power.
Bodily contact with these voltages can result in
serious injury or death.
Quick-Look Troubleshooting
Problem
No power to feeder when
power switch is turned
on
A visual inspection will not
always be sufficient to determine
fuse integrity.
Fuses blow on power up
A fuse failure indicates a problem
with the last item connected
before failure occurs.
P
S
Si-1750 M
ro
erieS
anual
The "drive" consists of the AC power supply (transformer), the stepper
motor drive board, and the motor. The "controls" consist of the DC power
supply, the CPU board, the display/keypad decoder boards, the keypad,
any ribbon cables and wiring harnesses, the sensors, the motherboard, and
the relay I/O. Depending upon the options your machine has, you may or
may not have the motherboard and/or relay I/O. Once it is determined that
you have a drive or a controls problem, the next thing to check is the power
supply for that section.
The tables that follow are designed to be a "quick lookup" for a problem you
may be having. Wiring and board diagrams also contained in this manual
are provided for reference and component recognition and connection dur-
ing troubleshooting.
Solution
1. Make sure there is power present at the AC main where the control panel is
plugged in.
2. Check three-wire AC power cord for integrity at all three points.
3. Remove power cord from AC input switch module and disconnect the four connec-
tions to AC loads located on the back of the module inside the control panel.
4. Check the two fuses located inside the control panel's input power module. BOTH
fuses must be present and test good. Note: This power module is designed to hold
5mm x 20mm fuses, as well as 1.25" x .25" fuses. The machine ships from Stream-
feeder's facility with 5mm x 20mm fuses.
a.
Observe the voltage label showing through the window on the fuse housing for
proper orientation when the holder is re-inserted.
b.
A small screwdriver inserted under the tab will allow you to pry open the fuse
housing. Remove the red fuse holder. If the smaller 5mm x 20mm fuse is pres-
ent, verify that the metal tab "finger" is holding the fuse in the forward position
and has not allowed the fuses to slide back toward the outside of the control
panel and away from where contact with the metal pressure points inside the
module body is made.
c.
Use an ohmmeter to test the fuses. If necessary, replace with fuses of the
same rating only.
5. Reconnect power cable and with power switch turned "On," check for presence of
AC at the output connectors on the back of module where the transformer primary
lead connections are made.
6. If steady AC power is not measured as in the previous step, the module's internal
contacts are most likely worn, and the module must be replaced.
1. Install known good fuses of same rating only.
2. Disconnect all AC loads from the input:
a.
The transformer primary.
b.
The DC Supply AC input leads.
c.
Remove the red and yellow wire pairs from the stepper motor drive board.
68
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Table of Contents
Troubleshooting
