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PR ES S U RE SWI TCH
PRESSURE SWITCH
The purpose of a pressure switch is to monitor
the pressure on the outlet side of the pump.
When a tap is closed, and the pump continues
to run, there is an increase of pressure in the
system, and when that pressure reaches a
pre-set limit, the pressure switch will turn the
pump off.
PRESSURE SWITCH ADJUSTMENT
Pressure Switch Adjustment, Truma/Flo-Jet
pump. (Normally Grey upper section with
White lower section/valve housing)
•
All of the Truma/Flo-Jet pumps used by
Swift are pre-set at 28psi + / -3psi.
•
To further adjust the pressure switch
setting, a cover cap must be first be
removed from the end of the pump to
reveal a pressure adjusting screw, as
shown in the photos. A maximum of 1/4
turn clockwise or anti-clockwise, from
the factory setting, is advised. Turning the
screw clockwise 1/4 turn will increase the
pressure switch cut-out pressure, turning
the screw anti-clockwise will reduce the
pressure setting.
•
Please note a second screw mounted
below the cover cap is set in position with
threadlock, this should not be disturbed.
Pressure switch
adjusting screw
46
The pump may have to be removed to gain
access to the adjusting screw. Drain the water
system before removing the pump.
To remove the pump pull the blue taps at right
angles to the pipe work and lift the pump out.
TROUBLESHOOTING
Pump will not start, when the tap is
opened:
•
•
•
•
•
•
•
Pump runs, but will not pressurise system
(i.e. no or little water being discharged
from taps) - Not Pulsing:
•
•
•
Cover cap
•
•
•
Check fuse(s).
Check power source(s), and ensure there
is sufficient voltage to run the pump.
Ensure 'pump' LED is illuminated.
Using a multi-meter, ensure there is power
at the pump. If not, refer to your dealer as
there maybe damaged cabling or a fault
with the fusebox.
Is the pump hot? If so, allow to cool
before retrying.
Has the vehicle been stored over winter?
was it correctly winterised? If no, the pump
may have frozen, causing permanent
damage.
The pressure switch may need adjusting.
(See pressure switch paragraph in this
section for how to do this)
Ensure that there is water in the fresh
water tank.
Check in-line filter is free from debris and
correctly fitted.
Ensure water system has been primed
correctly, (see primming the water system
page 44), and there are no air-locks
present.
Ensure there are no restrictions
in the plumbing.
Using a multi-meter, ensure there is power
at the pump. If not, refer to your dealer as
there maybe damaged cabling or a fault
with the fusebox.
Ensure the inlet side of the pump is
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