Shutdown
code
Description
Probable causes
Checking / solution
5v[5
The maximum difference
between the exchanger
temperature and the return
temperature has been exceeded
The water flow in the
installation is insufficient
4
Check the circulation (direction, pump,
valves)
4
Check the water pressure
4
Check the cleanliness of the heat
exchanger
Sensor error
4
Check that the sensors are operating
correctly
4
Check whether the boiler sensor has been
correctly fitted
5v[6
The maximum difference
between the boiler temperature
and the exchanger temperature
has been exceeded
The water flow in the
installation is insufficient
4
Check the circulation (direction, pump,
valves)
4
Check the water pressure
4
Check the cleanliness of the heat
exchanger
Sensor error
4
Check that the sensors are operating
correctly
4
Check whether the boiler sensor has been
correctly fitted
5v[7
Maximum difference between the
flow and return temperature
exceeded
The water flow in the
installation is insufficient
4
Check the circulation (direction, pump,
valves)
4
Check the water pressure
4
Check the cleanliness of the heat
exchanger
Sensor error
4
Check that the sensors are operating
correctly
4
Check whether the boiler sensor has been
correctly fitted
5v[8
The
RL
inlet on the PCU PCB
terminal block is open
Parameter error
4
Reset
df
and
dV
4
Restore parameters with Recom
Bad connection
4
Check the wiring
5v[9
Phase and neutral of mains
supply mixed up
4
Mains supply
incorrectly wired
4
Floating or 2 phase
network
4
Invert phase and neutral
4
Set parameter
p34
to
0
5v[10
5v[11
The
BL
inlet on the PCU PCB
terminal block is open
The contact connected to
the
BL
inlet is open
4
Check the contact on the
BL
inlet
Parameter error
4
Check the parameter
IN.BL
Bad connection
4
Check the wiring
5v[13
Communication error with the
SCU PCB
Bad connection
4
Check the wiring
SCU PCB not installed in
the boiler
4
Install an SCU PCB
5v[14
The water pressure is lower than
0,8 bar
Not enough water in the
circuit
4
Top up the installation with water
5v[15
Gas pressure too low
4
Incorrect setting of the
gas pressure switch on
the SCU PCB
4
Gas pressure too low
4
Wiring fault
4
Pressure switch is not
or badly fitted
4
Gas valve defect
4
Check that the gas valve is fully opened
4
Checking the gas supply pressure
4
Check whether the gas pressure control
system has been correctly fitted
4
Replace the gas pressure control system
if need be
4
Check the gas valve and replace if
necessary
5v[16
(1)
The SU PCB is not recognised
Wrong SU PCB for this
boiler
4
Replace the SU PCB
5v[17
(1)
The parameters saved on the
PCU PCB are impaired
Parameter error on the
PCU PCB
4
Replace the PCU PCB
(1) These lock-outs are not stored in the fault memory
6. Troubleshooting
IniControl For C 330 / C 630 ECO
29
260216 - 7600717-001-06