Truma Combi eco plus - Troubleshooting

19
Troubleshooting
Faults occurring during operation of the Combi furnace are displayed as an error code on the
CP plus control panel (refer to the Troubleshooting section in the CP plus manual for additional
instructions). The potential cause as well as a solution is described according to the error code
in the CP plus manual.
The potential causes for problems with the water system and the Combi furnace are described
below:
Problem Potential cause Solution
Water heats up too slowly. Lime scale (hard water calcifi-
cation) in the water container.
Decalcify the water container
(refer to “Decalcifying and cleaning
the water container” on page17).
Water drains. / The hot
water container cannot be
refilled.
The pressure relief/drain valve
is open.
Close the pressure relief/drain valve.
The water container cannot
be emptied even though
the pressure relief/drain
valve is open.
The drainage socket of the
pressure relief/drain valve is
obstructed.
Remove any obstructions such as
slush, ice, or leaves from the open-
ing of the drainage socket.
Make sure that the faucets are
opened in the position “hot”.
Water is dripping / flowing
from the drainage socket
of the pressure relief/drain
valve.
Water pressure in the water
system is too high.
Check the pump pressure and ad-
just if necessary. Replace the wa-
ter pump if an adjustment is not
possible.
Ensure that a pressure reducer is
installed on your city water con-
nection, not exceeding 40.6 psi
(2.8 bar).
The pressure inside the water
container rises above a water
pressure of approx. 65,25psi
(4.5 bar) – Truma pressure re-
lief/drain valve installed.
The Truma pressure relief/drain
valve protects the water container
against a pressure greater than
65,25psi (4.5 bar). This is not a
fault. If the condition continues,
contact Truma service.
Water pressure in the water
system is too high.
Replace the water pressure reducer
at the fresh water supply. This must
be performed only by a qualified
service technician.
Lime or dirt under the pres-
sure relief/drain valve seat.
Rinse the pressure relief/drain valve
to remove contamination from the
valve seat (refer to “Draining the
water container” on page13).
Replace the pressure relief/drain valve.
This must be performed only by a
qualified service technician.
If none of the measures in the troubleshooting chart proves successful, please contact your dealer,
the Truma Service Center on 1-855-558-7862 or one of our authorized service partners.