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2.5 FAULT AND ANOMALY SIGNALS.
The indoor unit signals any anomalies by flash-
ing a code on the display (14) according to the
following table.
Indoor unit error codes are preceded by the letter
"E", while error codes referring to the condensing
unit are preceded by the letter "A". For the latter,
refer to the condensing unit booklet for the
complete list of all the anomalies.
The CAR
V2
displays error codes with only the
last two digits (e.g. E184 = ERR 84).
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 after extended
downtime, it may be necessary to eliminate the block.
Press the Reset button (1) (4)
E 2
Safety thermostat
block (overheating),
flame control or fumes
thermofuse anomaly
During normal operation, if a fault causes excessive overheating
internally, the indoor unit goes into overheating block.
Press the Reset button (1)
E 4
Contacts resistance
block
The 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 flow
probe anomaly
The board detects an anomaly on the NTC heat generator flow probe. The system does not start (1).
E 6
Domestic hot water
probe anomaly
The board detects an anomaly on the domestic hot water NTC probe.
In this case the antifreeze function is also inhibited.
The 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 that have already performed.
Attention:
the fault may be reset up to
5 times consecutively, after 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 off again, the 5 attempts
are re-acquired.
E 10
Insufficient system
pressure
Water pressure inside the central heating circuit that is sufficient to
guarantee the correct operation of the heat generator is not detected.
Check on the heat generator pressure gauge
(1) that the system pressure is between
1÷1.2 bar and restore the correct pressure
if necessary
E15
Configuration error
If the board detects an anomaly or incongruity on the electric wiring,
the appliance will not start.
If normal conditions are restored, the heat
generator restarts without having to be
reset. (1)
E 16
Fan anomaly
This occurs if the fan has a mechanical or electrical fault.
Press the Reset button (1) (4)
E 20
Parasite flame block
This occurs in the event of a leak on the detection circuit or anomaly
in the flame control unit.
Press the Reset button (1) (4)
E 23
Heat generator return
probe anomaly
The board detects an anomaly on the heat generator return NTC probe. The system does not start (1) (4)
E 24
Push button control
panel anomaly
The board detects an anomaly on the pushbutton panel.
If normal conditions are restored, the
system restarts without having to be reset
(1).
E 26
System flowmeter
anomaly
The board detects an anomaly on the system flowmeter.
(1) (3)
Make sure any return pump (optional) only
activates when requested.
(1) If the block or anomaly persists, contact an authorised company (e.g. the Authorised Technical Assistance centre).
(2) The anomaly can only be verified in the list of errors in the “Information” menu
(3) The heat pump mode does not start, the heat generator stays active to satisfy the room heating and domestic hot water production requests
(4) The heat generator does not start, the heat pump mode stays active to satisfy the ongoing requests