Spectra Watermakers Ventura 150T MPC, Installation And Operating Manual

Page: 49 / 86

49
Pump runs intermittently,
cycling on/off

Overpressure switch on
ShurFlo pump opening

Adjust or replace switch
(see page 58)
Feed pump runs constant-
ly, will not turn off

Turn off manual switch on control
box

Manual switch in ON
position on control box
Display activates, but pump
will not run

Loose or broken pump
wire connection

Tanks are full (if equipped
with tank switch)

Check wiring at terminal block
inside MPC

Check tanks– system cannot
be started if tanks are full.
System runs, no product
water delivered to water
tanks, GPH bar graph shows
OK, “reject” LED activated

High salinity of product
water, causing system to
reject water

Salinity probe out of cali-
bration or defective, bad
cable

Chlorine damage to mem-
branes

Pressure relief valve open

Check for low feed pressure

Check for leaks at high pressure
hoses

Test product water with hand-held
tester– if over 500 PPM for 1 hour,
contact factory

Close pressure relief valve
No lights or display, system
does not operate

Remote display not con-
nected 
Check display cable connections at
back of display and at control box

Check and reset main DC supply
breaker

Check for voltage (12 or 24 VDC) at
control box power input studs

Try manual switch on MPC control
box: If pump runs, then control or
display is defective
System runs, no product
water delivered to water
tanks, GPH bar graph
shows OK, “Good” LED acti-
vated

Diversion valve inoperative
or wiring fault.

Disconnected or broken
product tubing

Diversion valve plunger
stuck

Check wiring at diversion valve and
inside control box

Check product tubing

Disassemble and clean diversion
valve plunger or replace valve
(contact factory)
Feed pump runs with loud
noise

Intake blocked

Air in system

Check thru-hull valve

Check sea strainer for leaks

Check fresh water flush module for
leaks

Re-prime system (restart)
Troubleshooting Ventura MPC Systems
SYMPTOMS
PROBABLE CAUSE
REMEDY