Donaldson Company, Inc.© 1998
20
7.0 TROUBLESHOOTING GUIDE
TROUBLE
REMEDY
POSSIBLE CAUSE
A.
No blinking red light
(Control Board)
1.
No input voltage to the
transformer.
2.
No output voltage from the
transformer.
a.
Blown fuse on the
transformer.
b. Transformer has failed.
1. The transformer is wired
improperly for the supply
voltage.
2. Check the blower fan
rotation. The collector fan
may be rotating backwards.
3.
Collector doors may be
open.
1. Using a volt ohm meter,
check for voltage terminals
H1 and H4 on the
transformer. The transformer
must have power at all times.
Correct the input wiring
(reference Figure 21 SGL
Wiring Diagram and Figure 18
Transformer Voltage Table).
2a. Replace fuse with MDX 3 amp
fuse only. Other types of
fuses may cause shaker
motor damage.
2b. Using a volt ohm meter,
check the output voltage at
terminals X
1
and X
2
on the
transformer (must be 115
volts AC). If there is no output
voltage, replace the
transformer.
1. Correct the connections to the
transformer.
2. To check the fan rotation, look
down at the top of the motor
fan; it must spin clockwise
(Also reference the rotation
label on the fan housing or the
motor mounting plate). To
change rotation, reverse any
two wires on the output side
of the starter (3 phase motors
only—reference Figure 21
SGL Wiring Diagram).
3. Secure doors. The pressure
switch will not function
without a minimum internal
cabinet pressure of 3" w.g.
(reference Pressure Switch
Details).
Reference Drawings
2SG-40533-00 Single VS
B. Blinking red light
functioning on the
Control Board; shaker
motor does not start.
