Pressure Switch Troubleshooting - Swift Motorhome Owners Service Manual

Troubleshooting
Pump will not start, when the tap
is opened:
• 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)
Pump runs, but will not pressurise system
(i.e. no or little water being discharged
from taps) - Not Pulsing:
• 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 priming 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
watertight and not allowing air into
the system.
• Using a multimeter check that the voltage is
between 10 and 14.5 volts. If not, refer to
your dealer.
WATER L EVEL SEN S OR & CL E A N IN G
Pump continues to run (for more than 5
seconds) after taps are closed or pump
turns on for no reason:
• Check for leaks on the high pressure side of
the pump.
• Ensure water system has been primed
correctly, as per the handbook, and there are
no air-locks present.
• Ensure the pump is securely mounted.
• Ensure the piping on the high pressure side
of the pump is in good condition (not blowing
or deforming).
• The pressure switch may need adjusting.
(See pressure switch paragraph in this
section for how to do this)
Noisy or rough operation
• Check for leaks on the high pressure and low
pressure side of the pump.
• Ensure that all pipes (especially those
within 150mm of the pump) are not touching
any furniture.
• Ensure the pump is securley mounted
Pump rapidly cycles (switches on or
off) or water pulses from taps, including
temperature pulsing:
• Check for leaks on the high pressure and low
pressure side of the pump.
• Ensure there are no restrictions in the
plumbing
• The pressure switch may need adjusting.
(See pressure switch paragraph in this
section for how to do this)
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