Fig. 2-6
Fig. 2-7
INS
TALL
ATI
O
N
US
ER
MAINTEN
AN
CE
18
Alpha Intec 50CS
Note:
The boiler may start-up automatically if the
anti-freeze mode is activated, (item 13 Fig. 2-1).
Also, the boiler can operate for a brief period
of time after a demand for domestic hot water
in order to return the domestic hot water store
back to temperature.
Important:
With the boiler in stand-by mode
(
) hot water cannot be produced and the
safety systems cannot be guaranteed, such as
pump anti-block, anti-freeze and three way
anti-block.
2.6 FAULT SIGNALS.
The Alpha InTec boiler signals any faults by the
flashing symbol (item 5 in Fig. 2-1) along with
'ERRxx' on the staus display (item 6). Where 'xx'
corresponds to the error code described in the
following table.
Fault signalled
Error
code
Ignition failure
01
Safety thermostat fault
(overheating), flame control fault
02
Flue safety thermostat fault
03
Short circuit or bad connection
04
Flow sensor fault
05
Maximum number of resets reached
08
Insufficient system pressure
10
Storage tank sensor fault
12
Configuration error
15
Fan fault
16
Flame sensing fault
20
Return sensor fault
23
Push button control panel fault
24
Insufficient circulation
27
Loss of remote control
communication
31
Low temperature zone 2 sensor fault
32
Low temperature zone 3 sensor fault
33
Low temperature zone 2 safety
thermostat operation
34
Low temperature zone 3 safety
thermostat operation
35
IMG Bus communication loss
36
Low power supply voltage
37
Loss of flame signal
38
Ignition failure.
The boiler lights automatically
with each demand for central heating or
domestic hot water. If it does not light within 10
seconds, the boiler remains in stand-by for 30
seconds, tries again and if the second attempt
fails it will go into 'ignition block' (ERR01). To
eliminate 'ignition block' the Reset button 'C'
must be pressed. The fault can be reset 5 times
•
domestic hot water priority function
By
pressing button 'B' the DHW priority function
is deactivated, which is marked by the switch-
off of the symbol (item 15 in Fig. 2-1) on the
display. The disabled function keeps the water
contained in the storage tank at a temperature
of 20°C for 1 hour, giving the priority to central
heating.
•
Functioning with external sensor (Fig. 2-6)
optional.
In the case of a system with optional
external sensor, the boiler flow temperature
for central heating is managed by the external
sensor depending on the external temperature
measured (Par. 1.5). It is possible to modify
the flow temperature from -15°C to +15°C
with respect to the adjustment curve (Fig.
1-4 Offset value). This correction, which can
be activated using the selector switch (item
3) is kept active for any external temperature
measured. The modification of the offset
temperature is indicated on the display (item 7).
The temperature indicated on the display (item
4) is the current flow temperature and after a
few seconds from the modification it is updated
with the new correction. 'SET' appears on the
status display (Fig. 2-6). By turning the selector
switch (item 3) in a clockwise direction the
temperature increases and in an anti-clockwise
direction it decreases.
consecutively, after which the function disabled
for at least one hour. One attempt is allowed
every hour for a maximum of 5 attempts. By
switching the boiler on and off the 5 attempts
are re-acquired. On commissioning or after
extended inactivity it may be necessary to
eliminate the 'ignition fault'. If this phenomenon
occurs frequently, contact a qualified engineer
for assistance.
Safety thermostat fault (overheating).
During
operation, if a fault causes excessive overheating
of the boiler, or a fault occurs in the flame control
section, an overheating fault is triggered in the
boiler (ERR02). To eliminate 'overheating fault'
the Reset button 'C' must be pressed. If this
phenomenon occurs frequently, call a qualified
engineer for assistance.
Flue safety thermostat fault.
This occurs in
the case of partial internal obstruction (due to
the presence of lime scale) or external blockage
(combustion residues) to the combustion
chamber. To eliminate the 'flue thermostat fault'
the Reset button 'C' must be pressed. Call a
qualified engineer to remove the obstructions.
Short circuit or bad connection.
This occurs
in the case of faults to the safety thermostat
(overheating) or fault in the flame sensing
control. The boiler does not start and a qualified
engineer must be called.
Flow sensor fault.
If the board detects a fault
with the system NTC flow sensor, the boiler will
not start. Call a qualified egineer for assistance.
Maximum number of resets reached.
The
maximum number of 5 resets has been reached.
Refer to previos paragraph -
Ignition failure
.
Insufficient system pressure.
Low water pressure
inside the central heating system is detected and
prevents the boiler operating. Check the boiler
pressure gauge (item 1, Fig. 2-1) is between 1
and 1.2 bar. Restore to the correct pressure if
necessary and check for leaks.
Storage tank sensor fault.
If the board detects
a fault with the storage tank sensor, the boiler
will not produce domestic hot water. A qualified
engineer must be called.
Configuration error.
If the board detects a fault
in the electric wiring, the boiler will not start. If
normal conditions are restored the boiler restarts
without having to be reset. If the fault persists,
contact a qualified engineer for assistance.
Fan fault.
This occurs if the fan has a mechanical
or electrical fault. To eliminate the 'fan fault'
the Reset button 'C' must be pressed. If the
fault persists, contact a qualified engineer for
assistance.
Flame sensing fault.
This occurs in case of a
leak on the detection circuit or fault in the flame
control unit. The boiler can be reset in order
to allow a new ignition attempt. If the boiler
does not start, contact a qualified engineer for
assistance.
Return sensor fault.
In this condition the boiler
does not correctly control the pump if set at
'Auto'. The boiler continues functioning but to
eliminate the fault, contact a qualified engineer
for assistance.
Set central heating flow temperature with
external sensor (optional)
Winter operating mode with external
sensor (optional)
During a request for central heating 'CH ON'
appears on the status indicator (item 6) and at
the same time as burner lights the flame presence
display switches on (item 8) together with the
output scale next to it. The displays (items 7 and
9) indicate the instantaneous outlet temperature
from the primary heat exchanger. In the central
heating mode, if the temperature of the water
contained in the system is sufficient to heat the
radiators, the boiler will only function with the
activation of the boiler pump.
From this moment the boiler operates
automatically. With no demand for heat (central
heating or domestic hot water) the boiler goes
into 'stand-by' mode, equivalent to the boiler
being powered without the boiler alight.
18
3
6
4
7
SET
ESC
°C
°C
1
2
8
14
4
3
6
9
7
18
CH ON
MENU
°C
°C
°C
Summary of Contents for InTec 50CS
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