15
IN
ST
ALLER
U
SER
MAINTE
NA
NCE TECHN
IC
IAN
2.4 BOILER IGNITION.
Before ignition make sure the central heating
(15) indicates a pressure of 1 - 1.2 bar;
- Open the gas cock to the boiler.
- Turn the main selector switch (12) taking it
to the Domestic Hot Water/Comando Amico
Remoto
V2
(CAR
V2
) (
) or Domestic Hot
Water and Central heating position(
).
N.B.:
once the main switch (12) has been
positioned the green indicator light (1), which
indicates the presence of voltage in the boiler,
will remain on.
During normal boiler functioning the LEDs from
5 to 11 indicate the temperature of the outlet
water of the main heat exchanger.
Attention:
indicates that there is an anomaly present, refer
to the successive paragraph.
Functioning of the boiler in domestic hot water
mode and in central heating mode is indicated
respectively by the switch-on of LED 3 or LED 4.
•
Operation with Comando Amico Remoto
V2
(CAR
V2
)(Optional). With selector switch (12)
in position (
) and CAR
V2
connected,
the boiler selector switches (13) and (14) are
are set from the control panel of the CAR
V2
.
Connection to the CAR
V2
is indicated by LEDs
).
Also in the presence of CAR
V2
remote control
indications of the temperature and any faults
are maintained on the control panel.
•
Operation with Comando Amico Remoto
V2
(CAR
V2
). With the selector switch (12) in
position (
) the heating adjustment
selector switch is excluded, the domestic hot
water temperature is adjusted by the selector
switch (13). With the selector switch in position
(
) the heating adjustment selector
switch (14) is used to regulate the temperature
of radiators, while selector (13) continues to be
used for domestic hot water. Turn the selector
switches clockwise to increase the temperature
and anti-clockwise to decrease it.
N.B.:
the boiler may start-up automatically if the
anti-freeze function is activated.
With the boiler main switch in stand-by position
(
) the boiler does not produce hot water but
safety functions are guaranteed, such as: pump
anti-block, anti-freeze and three way anti-block.
2.5 FAULT AND ANOMALY SIGNALS.
of LED 1.
Fault code
LED
Remote
display
No ignition block
Led 5 (
)
E01
Flue pressure
switch fault
Led 6 (
)
E11
pressure
Led 7 (
)
E10
Circulation
Led 8 (
)
E27
Flow probe
fault
Led 9 (
)
E05
Domestic hot water
probe fault
Led 10 (
)
E06
Safety thermostat
block (overheating),
ue thermostat or
control fault
Led 11 ( )
E02
Contacts resistance
block
LED 6 (
) and
Led 10 (
)
simultaneous
E02 + E04
alternating
block
LED 2 ( ) and
Led 11 ( )
simultaneous
E02 + E20
alternating
Comando Remoto
communication
loss or RS232
LEDs 3 and 4
alternating
(
)
E31
Ignition block.
with each demand for room central heating or hot
water production. If this does not occur within
10 seconds, the boiler remains in stand-by for 30
seconds, try again and if the second attempt fails
eliminate the “start-up block” it is necessary to
turn the main switch (12) taking it temporarily to
the Reset position or using the Reset key on the
CAR
V2
in inhibited for at least one hour. One attempt is
gained every hour for a maximum of 5 attempts.
may be necessary to eliminate the “ignition block”.
Or in the event the heat exchanger or the trap are
clogged and cannot drain the condensation. If this
Fumes pressure switch fault.
intake or exhaust pipes are blocked or in case of
a fan fault. If normal conditions are restored the
boiler restarts without having to be reset. If this
technician for assistance.
Water pressure
to guarantee the correct functioning of the boiler
is not detected. Check that the system pressure
is between 1÷1.2 bar.
water circulating in the primary circuit; the
causes can be:
-
devices are closed on the heating circuit and
that the system is free of air (deaerated);
- circulating pump blocked; free the circulating
pump.
If this phenomenon occurs frequently, contact a
assistance.
Delivery probe fault.
If the board detects an
fault on the system NTC delivery probe, the boiler
technician for assistance.
Domestic hot water probe fault.
If the P.C.B.
detects a fault on the DHW NTC probe
of LED 10. In this case, the boiler continues to
produce DHW but not with optimal performance.
Moreover, the anti-freeze function is prevented,
for assistance.
Overheating block.
During operation, if a fault
causes excessive fumes overheating internally, or
an over-temperature block is triggered in the
“overheating block” it is necessary to turn the
main switch (12) taking it temporarily to the
Reset position or using the Reset key on the CAR
V2
.
If this phenomenon occurs frequently, contact a
Contacts resistance block.
case of faults to the safety thermostat (over-
boiler does not start. To eliminate “contacts
resistance block” the main selector (12) must
be turned to the Reset position temporarily. If
this phenomenon occurs frequently, contact a
Parasite ame block.
is occurs in case of
a leak on the detection circuit or anomaly in
the ame control unit. e boiler does not
main selector (12) must be turned to the Reset
position temporarily. If this phenomenon occurs,
Loss of remote control communication.
is occurs in the case of an incompatible
connection to a remote control or if there is a
loss of communication between the boiler and
Comando Amico Remoto
V2
(CAR
V2
) remote
control. Try the connection procedure again by
switch (12) to position (On). If the CAR
V2
is still
not detected on re-starting the boiler will switch
to local operating mode, i.e. using the controls
on the boiler itself. If this phenomenon occurs,
assistance.
assistance.
Hunt Heating technician for assistance.
/ EXT
N.B.:
Please check carefully for the selector switch
is set to the correct position when using CAR
V@
.
Also check correct switch position when using
own room thermostat. Unit will not operate if
not in correct position.
Summary of Contents for HE COMBI EXTERNAL
Page 31: ......
