Troubleshooting
152 811390 Operator Manual DynaMAX 550P/560P/575P Waterjet Pump
Faults
Fault conditions cause the pump to turn off.
Static seal: The high-pressure seal at the output end of the high-pressure cylinder
Dynamic seal: The high-pressure seal that is nearest the hydraulic center section
Alarm Cause Solution
Fault 1: Hydraulic Fluid>65C
The hydraulic fluid temperature is
higher than65ºC(149ºF).
The system is not cooling
sufficiently.
Refer to Temperature on page 167.
Fault 1: Intensifier 1 Overstroke
to Left
Fault 1: Intensifier 1 Overstroke
to Right
An overstroke fault occurs when
the hydraulic piston travels faster
than the pump can sustain.
A poppet (high-pressure or
low-pressure) is stuck or is leaking.
Check the low-pressure poppet on
the same side as the overstroke.
Check the high-pressure poppet
on the opposite end from the
overstroke. Refer to Overstroke on
page 159.
Fault 1: Low Inlet Water Pressure
The water pressure at the manifold
is lower than the minimum setting.
The supply-water pressure is lower
than2.8bar(40psi).
Increase the supply water
pressure.
Pressure is lost because of a leak. Identify the source of a leak and
correct the problem.
The supply water is off. Turn
ON the supply water.
Fault 2: Input to Primary Motor
Not Received
The controller did not receive a
signal from the starter when the
pump was turned on.
• If the soft starter fault light is
on, look for loose wires.
• Make sure the contactor on
the starter is operating
correctly.
Fault 2: Primary Motor
The primary motor did not start.
The motor is not cooling
sufficiently.
• Clean the air inlet.
• Clean the outlet and the
cooling fins.
• Reduce the ambient air
temperature, if possible.
The motor is being started too
frequently.
Wait longer between stopping and
starting the motor.
The motor bearing is too hot. Lubricate the bearing.
A fuse in the electrical enclosure
has blown.
Replace the fuse.
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