Scotchman 2094A, Manual, Page: 28 / 57

5. Check the limit switches. (For procedures, REFER TO SECTION 8.2 ON THE FOLLOWING
PAGE.)
6. No power from the transformer: Check the voltage across the transformer’s secondary terminals. It
should read 110 to 120 volts.
7. The solenoid on the control valve is not functioning. REFER TO SECTION 8.3.
8. The foot pedal switch is not functioning properly. A voltage test may be run on the terminal strip in
the control box to determine if the foot switch is working properly.
Ü
WARNING: THERE IS LINE VOLTAGE PRESENT IN THE CONTROL BOX WHEN THE MA-
CHINE IS POWERED. THESE TESTS SHOULD BE PERFORMED BY A QUALIFIED ELEC-
TRICIAN.
TO TEST THE FOOT SWITCH:
Power the machine and place the selector switch in the MANUAL position.
Test the voltage between terminal #’s 5 and 6 and ground.
With the pedal up, the voltage should read 110 to 120 volts between 5 and ground.
There should be no voltage reading between 6 and ground.
With the pedal depressed, the voltage should read 110 to 120 volts between 6 and ground.
There should be no voltage reading between 5 and ground.
IF THESE READINGS ARE NOT CORRECT, continue on with the following steps.
A. Turn off the machine’s power and remove the cover on the foot pedal. Check for loose connections.
B. Make sure that the switches are adjusted properly. (You should hear two distinct "clicks" approxi-
mately 1/2 inch (12mm) apart when depressing the pedal.) There is a set screw adjustment on the
pedal shaft to adjust the switches.
C. Check the switches with an Ohm meter.
9. Damage to the foot pedal cord: Check the continuity of the wires in the cord with an Ohm meter.
Make sure that the power to the machine is off and locked out. The wires must be disconnected
from the pedal and the terminal block.
10. The pump to motor coupler is damaged. Loosen the set screws in the pump and motor flanges and
slide them apart. Inspect the coupler. If it is damaged, replace it.
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