Messages
Code Description
Checking / solution
BL INPUT OPEN
B10
B11
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
BL. PCU COM
B13
Communication error with the
SCU PCB
Bad connection
4
Check the wiring
SCU PCB not installed in the boiler
4
Install an SCU PCB
BL.WATER MIS.
B14
The water pressure is lower than
0,8 bar
Not enough water in the circuit
4
Top up the installation with water
BL.GAS PRESS
B15
Gas pressure too low
Incorrect setting of the gas pressure switch on the SCU PCB
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
BL.BAD SU
B16
The SU PCB is not recognised
Wrong SU PCB for this boiler
4
Replace the SU PCB
BL.PCU ERROR
B17
The parameters saved on the
PCU PCB are impaired
Parameter error on the PCU PCB
4
Replace the PCU PCB
BL.BAD PSU
B18
The PSU PCB is not recognised Wrong PSU PCB for this boiler
4
Replace the PSU PCB
BL.NO CONFIG
B19
The boiler has not been
configured
The PSU PCB has been changed
4
Set the type of generator again in the menu
#CONFIGURATION
(Refer to the original rating plate)
BL. COM SU
B21
Communication error between
the PCU and SU PCBs
Bad connection
4
Check that the SU PCB has been correctly put in place on the
PCU PCB
4
Replace the SU PCB
BL.FLAME LOS
B22
No flame during operation
No ionization current
4
Purge the gas supply to remove air
4
Check that the gas valve is fully opened
4
Check the supply pressure
4
Check the operation and setting of the gas valve unit
4
Check that the air inlet and flue gas discharge flues are not
blocked
4
Check that there is no recirculation of flue gases
BL.SU ERROR
B25
Internal error on the SU PCB
4
Replace the SU PCB
REVISION
M04
A service is required
The date programmed for the service has been reached
4
Carry out maintenance on the boiler
4
To clear the inspection, programme another date in the menu
#REVISION
or set the parameter
REVISION TYPE
to
OFF
REVISION A
M05
An A, B or C service is required The date programmed for the service has been reached
4
Carry out maintenance on the boiler
4
To clear the inspection, press key
t
REVISION B
M06
REVISION C
M07
DISGAS
M20
A boiler vent cycle is underway Switching the boiler on
4
Wait 3 minutes
MCA 15 - MCA 25 MCA 25/28 MI
8. Troubleshooting
29/04/2010 - 300022146-001-B
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