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FOR THE INSTALLER
SYMPTOM
Cold water
only -neon
light off.
Water too
cold -neon
light on.
Water flow too
low, or
temperature too
high.
CAUSE
Electricity not on
The water supply is connected to
the OUTLET of the unit.
The high temperature thermal cut
out has tripped
The flow switch is not
working.
Water flow too high for unit to
control
One element is not working.
The power supply voltage has
dropped.
Temperature is turned too low.
There are restrictions in the
plumbing.
WHAT TO DO
Check electrical supply.
Reconnect the water supply to the
INLET (marked in blue)
Reset it by opening the unit and
pushing the button on the cutout
(diagram 7).
Before you do this you must find
the cause of the problem.
Turn off the power and observe if the
flow switch activates when the water
is turned on. If not contact BBT
800-798-8161
www.boschpro.com
Adjust water flow to
recommended flow rate.
Switch off the electricity and check
the resistance of the elements.
Check the supply voltage to the
heater.
Ensure that the temperature dial is
in the correct position for the flow
of water.
Check the plumbing. Only use
Teflon tape for sealing pipe joints.
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