Flow HYPLEX, Manual, Page: 37 / 100

© Flow International Corporation
M-416 | 37
CHAPTER 3
Maintenance & Troubleshooting
My UHP pressure seems to change depending on the state of the on/off valve (whether it's on or off).
Some degree of pressure change (2000-3000 psi [138-207 bar]) with the switching of the on/off valve is normal.
My pump does not start.
Pump not wired. • Check that operator-supplied service dis-
connect is on and all fuses are properly
sized and functional
•
Check that the motor starter disconnect is
turned on
•
Check for loose wiring. Call a certified
electrician.
Tripped circuit breaker in control box. Call Flow Technical Service.
My pump starts but immediately shuts down.
Crankcase oil temperature too high (can be
validated through FlowMaster Advanced
Diagnostics). •
Ensure proper oil level
•
Verify electrical sensor is functioning prop-
erly and replace if necessary
•
Replace crankcase if all other options have
been exhausted
Low inlet water pressure. •
Validate proper operation of inlet solenoid,
pressure gauges and switches; replace if
necessary
•
Verify adequate operator-supplied water
source
•
Check fuses
Motor overload shutdown has been tripped. Check with a certified electrician.
My inlet water gauges are not reading pressure.
Operator-supplied water not on, or supply
pressure is insufficient. Turn water on, inspect water supply pressure.
Failed inlet pressure gauges or gauge snubbing
orifices are clogged. Replace gauges or clean snubbing orifices.
Inlet solenoid valve not opening.
• Verify that an open signal is sent to the
valve
• Check wiring and tighten or replace
• Check fuses
Kinked or obstructed gauge line. Re-position the line or replace if damaged.