Unpacking
1 www.dcionline.com
Electrical
C1000 Series Service & Maintenance Manual
Service and Repair
SECTION IV
A. Electrical Components
1. Pressure Switch: Turns on or off the power supplied to the
individual compressor motor switches. The pressure switch is preset
to run the compressors to 100psi and then open, therefore stopping
the motor(s). When the system pressure drops to 80psi, the switch
closes, running the compressor motors to 100psi again.
To test the switch, bleed all pressure from the tank. Remove the
pressure switch top cover with a 3/8” wrench. With an AC voltmeter,
place the test leads on the outer terminals as shown in Fig. I. The
voltage indicated should agree with the machine data plate, either 115
or 230 volt AC. If no voltage is present, check the circuit breaker.
Fig. I
Fig. J
ELECTRICAL
If the proper voltage is present on the outer terminals, move the voltmeter test leads to the inner terminals of the pressure switch as shown in
Fig. J. If NO voltage is present, the pressure switch is defective. If voltage is present, proceed to the next step.
Turn the machine power on, and wait for compressor to reach 100psi
and stop running. The 3/8” adjusting screw may be turned clockwise
to increase the cutoff pressure or counter-clockwise to decrease the
cutoff pressure. The maximum pressure cutoff should not exceed
100psi. If the compressor will not cut off at the desired preset
pressure, or will not stop under any condition, the pressure switch is
defective.
w w w.dcionline.com
12
