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Boiler Protection Devices
GB
Appliance shut-o conditions
The boiler is protected from malfunctions by means of internal
checks performed by the electronic P.C.B., which stops the boiler from
operating if necessary. In the event of the boiler being shut o in this
manner, a code appears on the control panel display which refers to
the type of shut-o and the reason behind it. Two types of shut-o
may occur:
Safety shut-o
This type of error is “volatile”, which means that the boiler starts up
again automatically as soon as the problem which caused the shut-
o is removed; Err” and the error code (es. Err/108) ash on the
display and the symbol appears.
In fact, soon as the cause of the shut-o disappears, the boiler starts
up again and continues to operate normally.
If the boiler still indicates a safety shut-o, switch it o. Make sure the
external electric switch is in the OFF position, shut o the gas valve
and contact a qualied technician.
N.B. if error 1 08 - Stop due to insufficient water pressure - occurs,
simply reset the boiler pressure.
Operation shutdown
This type of error is “non-volatile”, which means that it is not removed
automatically.
On the display ash Err and the error code (es. Err/501). and
appears RESET whit the symbol .
In this case the boiler does not restart automatically, but it may be
reset by pressing the RESET button.
If the problem manifests itself again after several attempts to reset the
appliance, contact a qualied technician.
Important
For safety reasons, the boiler will allow a maximum of 5 reset
operations to take place in 15 minutes (individual presses of the
RESET button).
The rst gure of the error code (e.g. 101) indicates within which
operational assembly the error occurred.
1 - Primary Circuit
2 - Domestic Hot Water Circuit
3 - Internal Electronic Part
4 - External Electronic Part
5 - Ignition and Detection
6 - Air inlet - ue gas outlet
7 - Multizone
Anti-frost Device.
The anti-frost function acts on the central heating ow temperature
probe, independently from other settings, when the electrical supply
is turned on. If the primary circuit temperature falls below 8°C the
pump will run for 2 minutes.
After the two minutes of circulation (xed) the boiler will check the
following:
a - if the central heating ow temperature is > 8°C, the pump stops;
b - if the central heating ow temperature is between 4 and 8°C, the
pump will run for another two minutes;
c - if the central heating ow temperature is < 4°C, the burner will re
(heating position) at minimum power until the temperature reaches
33°C, the burner will go o and the pump will continue to run for two
minutes.
If the boiler is tted with a tank, a second device controls the
temperature of the domestic hot water. If this drops below 8°C,
the distributor valve switches to domestic water position and the
burner operates until the temperature reaches 12°C. This followed
by a post-circulation cycle of 2 minutes.
The anti-frost device activates only when (with the boiler operating
correctly):
- the system pressure is correct;
- the boiler is electrically powered, the symbol is illuminated;
- there is a supply of gas
- no safety shutdown or lockout is in progress.
Table summarising error codes
Central Heating circuit
Display Description
101
Overheat
102
Pressure Sens Error
103
Insufficient circulation
104
105
106
107
108
Insufficient water (request lling)
109
System pressure > 3 bar
110
C.H. Flow temp. probe circuit open / short circuit
112
C.H. Return temp. probe circuit open / short circuit
114
External sensor circuit open / short circuit
118
Heating delevery probe problem
1P1
Insufficient circulation indication
1P2
1P3
1P4
Insufficient water (request lling)
D.H.W circuit
201
D.H.W. temp. probe circuit open / short circuit
202
Bottom storage temperature probe open / short circuit
203
Tank sensor probe open/short circuit
204
Solar collector temperature probe open / short circuit
207
Solar collector overheating
208
Collector frost protection temperature
209
Tank overheating
Internal P.C.B’.s
301
EEPROM error
302
Comunication error
303
Main P.C.B. error
305
Main P.C.B. error
306
Main P.C.B. error
307
Main P.C.B. error
3P9
Maintenance recommended
External P.C.B’.s
407
Room sensor circuit open 7 short circuit
Ignition and Detecion
501
No ame detected
502
Flame detected with gas valve closed
5P1
1st Ignition Failed
5P2
2nd Ignition Failed
5P3
Flame cut-o
Air Inlet / Flue gas outlet
605
Flue-gas sensor open short circuited
609
Flue-gas overheating
610
Thermal fuse open
Multi-zone Heating (Heating Zone Modules - optional)
701
Zone 2 outgoing sensor defective
702
Zone 2 return sensor defective
703
Zone 3 outgoing sensor defective
704
Zone 3 return sensor defective
705
Hydraulic separation sensor defective
706
Zone 2 overheating
707
Zone 3 overheating
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