CP600 Pivot Operators Manual
OPERATION, SAFETY & MAINTENANCE
Section 1-35
© Pierce Corporation
July 2010
1. Clearance between end gun trips and proximity
switch is too large
2. Proximity switch is wired incorrectly
3. Loose wire in the End Gun (Pink) circuit
4. Bad neutral at the end gun solenoid valve
5. End gun relay in control panel is not fully seated,
is wired incorrectly, or is bad
6. End gun solenoid valve is plumbed incorrectly
7. Bad end gun solenoid valve
8. Bad end gun control valve
1. Adjust proximity switch so it passes within ¼” of
the end gun trip(s)
2. Refer to the Options section of the Manual for
proper wiring
3. Check connections in control panel, collector
ring, and in each tower box
4. Check connections at the end gun solenoid valve
in the end tower box
5. Open control panel and ensure the end gun
relay is fully seated in the relay base. Check the
relay wiring against the wi ring diagrams in the
Electrical and Options sections of the Manual
6. Refer to the Auto End Gun portion of the
Options section in the Manual
7. With disconnect in the OFF position, check the
resistance of the solenoid valve coil. If the coil is
open or has zero resistance, replace the valve
8. With the machine running in Wet and at normal
operating pressures, disconnect the ¼” poly tubing
at the end gun control valve. If the end gun does
not turn on, replace the end gun control valve
End gun does not turn OFF
1. Proximity switch is wired incorrectly
2. End gun solenoid valve is plumbed incorrectly
3. End gun solenoid valve filter is clogged
4. Bad end gun solenoid valve
5. Bad end gun control valve
1. Refer to the Options section of the Manual for
proper wiring
2. Refer to the Auto End Gun portion of the
Options section in the Manual
3. Remove filter element and clean or replace
4. With disconnect in the OFF position, check the
resistance of the solenoid valve coil. If the soil is
open or has zero resistance, replace the solenoid
valve
5. With the machine running in Wet and at normal
operating pressures, disconnect the ¼” poly tubing
at the end gun control valve. If there is sufficient
water pressure at outlet of poly tubing, replace the
end gun control valve
Troubleshooting
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