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4.5.5
Location main shutoff valve
ENG
FR
Caution: label all wires prior to disconnec-
tion when servicing controls.
Wiring errors can cause improper and
dangerous operation.
Parts previously used for heating must not
be reused in the fabrication of the drinking
water system.
4.6
FUNCTIONING ANOMALIES
When there is a functioning anomaly, an
alarm appears on the display and the blue
luminous bar becomes red.
Descriptions of the anomalies with relative
alarms and solutions are given below:
– LOW WATER PRESSURE
ANOMALY ALARM 02 (fig. 23/a)
If the pressure detected by the transdu-
cer is lower than 0.5 bar (7.3 psi), the
boiler stops and the display shows the
40
Verify proper operation after servicing.
To avoid possible
damage caused by
hot
recommend that a
mixer
installed according
to the attached
layout.
alarm "ALL 02".
To restart operation, the water feed
system must be inspected.
The charge pressure, with the system
cold, must be between 1 and 1.2 bar
(14.5 and 17.4 psi).
If all the leds are of f, call the local autho-
rised Service Centre for technical assi-
stance.
If the load procedure has to be repeated
several times, it is advisable to check
that the seal of the heating circuit is
intact (check that there are no leaks).
GAS CONNECTION
water,
we
valve
is
Fig. 23/a
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