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Location:
The relay is located on the grinder base inside
the lower housing.
Test Procedure:
1. Disconnect the grinder from the power source
and place a coffee bag behind the dispense chute.
2. Check the voltage across the white/orange and
white or red/black wires on terminals A & B of
the relay with a voltmeter. Hold the Off/On/Start
switch in the “START” (lower) position and con-
nect the grinder to the power source. The indica-
tion must be:
a. 120 volts ac for two wire 120 volt models.
b. 230 volts ac for two wire 230 volt models.
c. 240 volts ac for two wire 240 volt models
3. Disconnect the grinder from the power source.
If voltage is present as described, proceed to #4.
If voltage is not present as described, refer to the
Wiring Diagrams and check the grinder wiring har-
ness.
4. Remove the white/red wires from relay contacts
7 & 9.
5. Check the voltage across the white wire or red/
black on terminal B and either white/red wire with
a voltmeter. Place the Off/On/Start in either the
SERVICE (cont,)
“ON” (center) position or “START” (lower) posi-
tion. Connect the grinder to the power source.
The indication must be:
a. 120 volts ac for two wire 120 volt models.
b. 230 volts ac for two wire 230 volt 50 Hz mod-
els.
c. 240 volts ac for two wire 240 volt 60 Hz mod-
els.
6. Disconnect the grinder from the power source.
7. Check the voltage across terminal B and the re-