318
All Units
SEPTEMBER 2009 Printed in U.S.A.
COPYRIGHT 2009, Heil Environmental
TROUBLESHOOT PUMP 219-2303 WITH 031-6427
In 2007, Heil changed the pump control valve to a design that easily allows testing the pump and the
pump control valve functions on the vehicle.
1. Hydraulic functions do not operate.
• When pump should be on, verify there is at least 10 volts at the pump coil.
• If 10 or more volts are present proceed to step 2.
• If not, determine if the PLC program (if so equipped) is at fault or a wire is broken.
2. When pump should be on, pull red knurled knob on the end of the solenoid valve. (Figure 1)
• Does the system work now?
• If so replace the coil
• If not proceed to step 3
Figure 1
Unload Cartridge Test Plug
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