40
8.5
Circuit Board Replacement
Should the circuit board be replace, the engineer MUST set the
parameters
as indicated in this table.
Type No. Description
Setting for
Murelle
Advanced HE ErP
30
40
PAR
01
Index showing boiler power
in kW
2 = 30; 4 = 40
2
4
PAR
02
Hydraulic configuration
0 = combi
1 = system
2 = N/A
3 = N/A
4 = N/A
5 = N/A
0
PAR
03 Gas Type Configuration
0 = G20; 1 = G31
0 or 1
To enter "Parameter setting and display" see page 32.
Once the parameters in the table have been set, you must
carry out the entire phase of "Self-calibrating procedure"
described at page 31.
If the gas valve and/or the ignition/detection electrode, and/or
the burner, and/or the fan are replaced, the engineer must still
carry out the entire phase of "Self-calibrating procedure"
described at page 31.
8.6
Possible faults and solutions
LIST OF MALFUNCTION/FAULT ALARMS
Type
No.
Fault
Solution
ALL
02
Low water pressure in
system
- Restore pressure
- Check for any leaks in
the system
ALL
03
High water pressure in
system
- Empty the system via
the drain valve on the
hydraulic assembly
and bring the pressure
to approximately 1.2
bar
ALL
04
Domestic hot water
sensor (SS) fault
- Check connections
- Replace the sensor
ALL
05
Delivery sensor (SM)
fault
- Check connections
- Replace the sensor
ALL
06
No flame detection
- Check the integrity
of the electrode and
check that it is not
grounded
- Check gas availability
and pressure
- Check the operation of
the gas valve
ALL
07
Safety thermostat (TS),
intervention
- Check the sensor
or thermostat
connections
- Deaerate the system
- Check the bleed valve
- Replace the sensor or
the thermostat
- Check that the pump
impeller is not blocked
ALL
08
Fault in the flame
detection circuit
- Check the integrity
of the electrode and
check that it is not
grounded
- Check gas availability
and pressure
- Check the operation of
the gas valve
Type
No.
Fault
Solution
ALL
09
No water circulating in
the system
- Check the rotation
of the system pump
impeller
- Check the electrical
connections
- Replace the pump
ALL
10
Auxiliary sensor fault
- Check PAR
02 "hydraulic
configuration"
- Check the electrical
connection
ALL
11
Gas valve modulator
disconnected
- Check the electrical
connection
ALL
12
Incorrect configuration
of the open / sealed
chamber
- Set the parameter
PAR 04 (Combustion
configuration) to 0
ALL
13
Exhaust sensor (SF)
intervention
- Replace the smoke
probe
- Contact the Technical
Assistance Centre
ALL
14
Exhaust sensor (SF)
fault
- Replace the smoke
probe
- Check the electrical
connection of the
smoke probe, if
the problem is not
resolved, contact the
Assistance Centre
ALL
15
Fan check cable
disconnected
- Check the connection
cable between the fan
and the board
ALL
18
Condensate level fault
- Check for any clogging
in the pipe which takes
the condensate to the
siphon
- Check that the siphon
is not clogged
ALL
28
Maximum number of
consecutive resets
reached (6)
- Contact the Technical
Assistance Centre
ALL
37
Fault due to low network
voltage.
- Check with tester
- Contact network
provider (ENEL)
ALL
40
Incorrect supply
frequency detected
- Contact network
provider (ENEL)
ALL
41
Flame loss more than 6
consecutive times
- Check the detection
electrode
- Check the gas supply
(open valve)
- Check mains gas
pressure
ALL
42
Button fault
- Check that buttons are
working
ALL
43
Open Therm
communication fault
- Check the electrical
connection of the
remote control
ALL
62
Self-calibrating
procedure is required
- Carry out the self-
calibrating procedure
(see the specific
section)
ALL
72
Incorrect positioning of
the delivery sensor
- Check that the delivery
sensor is attached to
the delivery pipe
ALL
81
Block due to combustion
during start-up
- Check for blockage
in flue
- Bleed the air from the
gas circuit
ALL
83
Irregular combustion
(temporary error)
- Check for blockage
in flue
ALL
96
Lockout due to flue
(exhaust) blockage
- Check for blockage
in flue
-
-
Frequent relief valve
intervention
- Check circuit pressure
- Check expansion
vessel
-
-
Limited production of
domestic hot water
- Check the diverter
valve
- Check that plate heat
exchanger is clean
- Check domestic hot
water circuit valve
