70
7.5
Circuit Board Replacement
Should the circuit board be replace, the engineer
MUST set
the parameters
as indicated in this table and in the sequence
shown.
Type No. Description
Setting for
Murelle
Revolution 30
PAR 01
Index showing boiler power in kW
5 = 25 (MURELLE REVOLUTION 25)
6 = 30 (MURELLE REVOLUTION 30)
6
PAR 02
Hydraulic configuration
0 = combi
1 = system
2 = N/A
3 = N/A
4=instant with solar power input
0
PAR 03 Gas Type Configuration
0 = G20/G25; 1 = G31
0 or 1
To enter "Parameter setting and display"refer to the indica-
tions provided in the specific section.
Once the parameters in the table have been set, you must carry
out the entire phase of "Self-calibrating procedure" described
in the specific section.
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" de-
scribed in the specific section.
7.6
Malfunction codes and possible solutions
Boiler fault (gas side)
Type
No. Fault
Solution
ALL
01 Not used
-
ALL
02 Low water pres-
sure in system
- Restore pressure
- Check for any leaks in the
system
ALL
03 High water pres-
sure 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
- Check the sensor is working
ALL
05 Delivery sensor
(SM) fault
- Check connections
- Check the sensor is working
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 thermo-
stat 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
ALL
09 No water circulat-
ing in the system
- Check the rotation of the pump
rotor
- Check the electrical connec-
tions
- Replace the pump
ALL
10 Auxiliary sensor
fault
- Check PAR 02 "hydraulic con-
figuration"
- Check the electrical connection
Type
No. Fault
Solution
ALL
11 Gas valve modula-
tor disconnected
- Check the electrical connection
ALL
12
Incorrect configu-
ration 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 Assis-
tance Centre
ALL
14 Exhaust sensor
(SF) fault
- Replace the smoke probe
- Check the electrical connection
of the smoke probe, if the prob-
lem 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 conden-
sate to the siphon
- Check that the siphon is not
clogged
ALL
28
Maximum number
of consecutive
resets reached (6)
- Wait 1 hour and try unblocking
the board again
- Contact the Technical Assis-
tance Centre
ALL
30 Return sensor
(SR) fault
- Replace the return probe
- Check parameters
- Contact the Technical Assis-
tance Centre
ALL
37 Fault due to low
network voltage
- Check the voltage
- Contact your network provider
ALL
40
Incorrect supply
frequency de-
tected
- Contact your network provider
ALL
41
Flame loss more
than 6 consecutive
times
- Check the ignition/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 com-
munication fault
- Check the OT electric connec-
tion
ALL
44 Gas valve timeout
fault without flame - Check gas valve and board
ALL
62
Self-calibrating
procedure is
required
- Carry out the self-calibrating
procedure (see the specific
section)
ALL
72
Incorrect position-
ing of the delivery
sensor
- Check delivery sensor opera-
tion and position
ALL
77
EV2 SGV current
max/min absolute
limits error
- Check gas valve and board
ALL
78 EV2 SGV current
upper limit error
- Check gas valve and board
ALL
79 EV2 SGV current
lower limit error
- Check gas valve and board
ALL
80
Fault on the valve
control logic line/
valve cable dam-
aged
- Check gas valve and board
ALL
82
Block due to
numerous com-
bustion control
failures
- Check electrode
- Check outlets
ALL
84
Flow rate reduced
for (presumed) low
pressure on mains
gas
- Check gas flow rate
ALL
88
Internal error
(board component
protection)
- Check the board is working
- Replace board