Scotchman FI-8510-20M, Manual

Page: 70 / 100

PAGE 67
5. Check the fuses in the control box. There are two fuses on the primary side and one on the
secondary side. Remove the fuses and check them with an Ohm meter.
6. Check the limit switches. (For procedures, REFER TO SECTION 8.2 ON THE FOLLOWING
PAGE.)
7. No power from the transformer: Check the voltage across the transformer’s secondary
terminals. It should read 110 to 120 volts.
8. The solenoid on the control valve is not functioning. REFER TO SECTION 8.3.
9. 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.
WARNING: THERE IS LINE VOLTAGE PRESENT IN THE CONTROL BOX WHEN THE
MACHINE IS POWERED. THESE TESTS SHOULD BE PERFORMED BY A QUALIFIED
ELECTRICIAN.
TO TEST THE FOOT SWITCH:
Power the machine and place the selector switch in either the PUNCH or the SHEAR position.
Test the voltage between terminal #’s 5, 10 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 10 and ground.
With the pedal depressed, the voltage should read 110 to 120 volts between 10 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"
approximately 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.
10. 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.
11. 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.