PMC MN-06001, Руководство пользователя

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PMCA-20
Manual
32
PROBLEM
Pumps have stalled, pressures on the chemical gauges are lower than normal and the pump
switch light is OFF.
SOLUTIONS
1. Remove the two wires located
on the “A” and “R” overpressure switches and check
for continuity through each switch, the switches should be normally closed.
If there is no continuity replace the switch.
PROBLEM
Pumps have stalled, the pressures on the chemical gauges are higher than normal and the
pump switch light is OFF.
SOLUTIONS
1. Check that the pressure on the chemical gauges has not exceeded the factory
overpressure setting. If both chemical pressures have exceeded the pressure
setting on the high pressure shut off switches check to see if the pneumatic
pressure control (air regulator) is not set too high. If one of the chemical gauges
reads high and the other low, then you need to balance the pressures. Open the
manual valve on the side that has the higher reading. This will drop the pressure on
the high side and bring up the pressure on the low side, when the pressures are
within 200 psi (13.8 bar) of each other close the manual valve. The pump light will
come back on if this was the problem and the pump circuit will be activated. If the
problem continues refer to the troubleshooting section of the metering pump line or
the spray gun manual.
If the pump light does not come back on go to the next step.
2. Check that the wires attached to each pressure switch are secure. Remove the
terminal lugs on the two high pressure shut off switches located on the pre-heater
and take a continuity reading across the two terminals on the switch.
If one of the switches is open the switch is defective or out of adjustment.
Replace the switch.
PROBLEM
With the Pump Switch in the normal position, pumps fail to develop pressure due to air loss.
SOLUTIONS
1. Check that the air regulator is not backed all the way out.
2. Check that the compressor is operating properly and that all valves are open.
3. Check that the pneumatic air motor is not leaking.