Flow HYPLEX, Manual, Page: 36 / 100

36 | M-416
© Flow International Corporation
HYPLEX PRIME PUMP
Maintenance & Service Manual
My pump does not
produce the pressure
requested from
FlowMaster
(continued). Failed or improperly set air relief valve. Replace air relief valve.
Loose fittings or failed hose for low-pressure
water. Tighten fittings or replace hose.
Improper pulley ratio for power frequency. Verify required pulley sizes for input power
(see
Interface illustrations for part numbers).
Missing 3-phase power leg. Call a certified electrician.
Incorrect version of computer code (specifi-
cally FlowMaster). Call Flow Technical Service for correct revision
number and install correct version.
Worn PCV poppet and seat. Install PCV maintenance kit (see section In-
stalling the pressure control valve maintenance
kit
).
Debris in PCV poppet and seat. •
Clean or remove debris, check for damage
of poppet and seat
• Ensure proper plumbing of the PCV drain
line
Incorrect motor rotation. •
Verify and ensure proper rotation
•
Call a certified electrician to swap polarity
on motor
Inlet water supply valve or solenoid failure (or
loose wires). •
Replace valve
•
Tighten wire fittings
•
Check breaker inside electrical control box
2-way air valve failure or loose wiring.
2-way air valve override switch is improperly
positioned. Position the override switch to "automatic"
mode.
My UHP pressure display is not stable.
A signal fluctuation greater than 5000 psi indicates:
Slow movement PCV poppet/seat damaged.
Install PCV maintenance kit (see section In-
stalling the pressure control valve maintenance
kit
).
Rapid movement Check valve is damaged or debris is present.
•
Rebuild per service procedure
•
Replace check valve assembly
Cutting orifice is too large or damaged. Replace with correctly-sized orifice (see sec-
tion
Changing the orifice in your cutting head
manual).
UHP check valve components are damaged
or require maintenance. Install a Minor or Major Maintenance Kit.