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INSTALLER
USERMAINTENANCE TECHNICIAN
TECHNICAL DATA
2.5 FAULT AND ANOMALY SIGNALS
e indoor unit signals any anomalies by ashing a code on the
display (14) according to the following table.
Error
Code
Anomaly signalled Cause Hydronic module status / Solution
E 1 No ignition block
In the event of request of room central heating or domestic
hot water production, the heat generator does not switch on
within the preset time. Upon appliance commissioning or
aer extended downtime, it may be necessary to eliminate
the block.
Press the Reset button (1) (4).
E 2
Safety thermostat
block (overheating),
ame control or ue
gas thermofuse
anomaly
During normal operation, if a fault causes excessive over-
heating internally, the indoor unit goes into overheating
block.
Press the Reset button (1) (2).
E 4
Contacts resistance
block
e P.C.B. detects a fault on the gas valve supply. Check its
connection. (the anomaly is detected and displayed only in
the event of a request).
(1) (4).
E 5
Heat generator ow
probe anomaly
e board detects an anomaly on the NTC heat generator
ow probe.
e system does not start (1).
E 6 DHW probe fault
e board detects an anomaly on the domestic hot water
NTC probe. In this case the antifreeze function is also in-
hibited.
e heat generator continues to
produce domestic hot water but not
with optimal performance (1) (4).
E 8 Maximum N° of resets Number of allowed resets already performed.
Attention: the fault may be reset up to
5 times consecutively, aer which the
function in inhibited for at least one
hour. One attempt is gained every
hour for a maximum of 5 attempts. By
switching the appliance on and o
again, the 5 attempts are re-acquired.
(1) If the shutdown or fault persists, contact an authorised company (e.g. Authorised Aer-Sales Technical Assistance Centre)
(2) e anomaly can only be veried in the list of errors in the “Information” menu.
(3) e heat pump mode does not start, the heat generator stays active to satisfy the room heating and domestic hot water produc-
tion requests.
(4) e heat generator does not start, the heat pump mode stays active to satisfy the ongoing requests.
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