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Installation troubleshooter
Complaint Cause Solution
The hoses are too short You are trying to install the boiler too far from
the safety group and/or tap
Place the boiler closer to the safety group and/or tap
The safety group provides an
unpleasant smell of sewage.
No loop in the black drain hose of the safety
group
Make a loop in the hose, as shown on the installation
drawing (step 9) of the installation set.
Water troubleshooter
Complaint Cause Solution
Tap is making bubbling noises There is air in the pipes Open both taps wide and de-aerate (stop valve, kitchen tap)
No water Main valve closed Open main valve
Stop valves closed Open stop valves
No hot water Stop valve safety unit closed Open stop valve
Little water is coming from the tap Water pressure is too low Check a different outlet. If the pressure is low here as well, fully
open the main tap. If the pressure is still too low you should
contact the water supplier.
Check whether the main tap and
stop valves are fully opened
Fully open the tap concerned
Make sure there is no kink in the
hose
Remedy the kink, or replace the hose if it is damaged
Scaling of the outlet Clean or replace the aerator
Hot water is coming out of the cold
water tap
The hoses of the tap have been
mixed up
Connect the hoses correctly
Hot water is too hot or too cold Hot water temperature has not
been set correctly
Adjust the temperature using the round knob (B4) on the boiler
No hot water coming from the hot
water tap and no boiling water from
the boiling water tap
Boiler is not (yet) heated up, see
LED indication on gure 17 and
in §3
Wait for the boiler to heat up, approximately 25 minutes
Check whether the boiler is switched on. For this, follow the
instructions in §3
Boiler is not connected to the
power supply
Place the plug in the wall socket
Check whether the power group concerned is switched on
Boiler is defective Contact the Hotto service line
When turning open the boiling water
knob (1), there is hot water coming
from the tap, but no boiling water
Boiler is set to 70°C Set the boiler to 100° using the standby knob (B3), see §3, and
wait for the boiler LED to turn red.
Water is not heated to 100°C Wait until the water is heated. The LED on the boiler will turn
red once the water has been heated.
Boiling water is coming out of the tap
with more bubbling noises and more
steam is created than otherwise
Boiler must be reset Press the reset switch (B6) at the rear of the boiler
Sensor or control unit is
defective
Contact the Hotto service line, see www.hotto.com
Boiling water is coming out of the tap
with bubbling noises and the tap has a
low yield of boiling water.
Scaling of the outlet Clean or replace the aerator
There is a white substance in the hot
water
There is too much scaling in the
tank
Have the boiler cleaned by an installer
The device makes boiling noises Too much scale deposit in the
device
Contact the Hotto service line, see www.hotto.com
Electricity troubleshooter
Complaint Cause Solution
The groups are switched off
continuously
Too many devices on one group Use less devices at the same time or connect devices to a different
group, or use an energy divider, www.hotto.com
The earth leakage circuit
breaker is activated
There is a short circuit in the
electrical circuit
Investigate which device causes the short circuit: Remove the plug of the
Hotto boiler from the wall socket, reset the earth leakage circuit
breaker. If it is activated again, this will mean that your Hotto boiler is
not the cause. Check which other device may be the cause. If the earth
leakage circuit breaker is activated again as a result of the Hotto boiler,
please contact the Hotto service line, see www.hotto.com
Standby LED does not light Boiler is getting no voltage Place the plug in the wall socket
Switch on the boiler using the button (B5) at the rear
Check whether there is voltage on the wall socket
Check in the group box whether the group concerned and the
accompanying earth leakage circuit breakers are switched on
No water in the boiler and safety
power interrupter is activated
Pull out the plug and allow the device to cool down for 30 minutes. Fill
with water. Press the RESET button (B6) at the rear. In case of several
resets, please contact the service line.
UK
25


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Hotto Boiler Additional guide - Dutch - 3 pages

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Hotto Boiler Installation Guide - French - 2 pages


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