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8 Troubleshooting
Code
Messages
B28
BL.BAD.CONFIG
B29 to
BL.UNKNOWN Bxx
B34
M08
REVISION AUTO
M23
CHANGE OUTSI.S
M30
BL.SYSTEM
NETWORK
M31
BL.COM MODBUS
8.3
Faults (Lxx or Dxx-type codes)
Fig.33
0
2
4
6
8
E
1
TEMP. : 68°
2
1
D
2
PCU. COM. FAIL. D27
bar
#
F
% $
AUTO
J
Fig.34
0
2
4
6
8
10
E
1
TEMP. : 68°
2
1
D
2
PCU COM.FAIL D27
bar
#
F
!
% $
AUTO
J
I
STD
32
AFC
Description
An HL tank has been detected
but the boiler cannot control it.
This message will disappear
after ten seconds if the boiler
can control the HL tank.
Incorrect configuration of the
PCU
An automatic service is re
quested
The outdoor temperature sen
sor is defective.
No communication with the
master control system via the
MODBUS network
Incorrect configuration of the
MODBUS network
10
12
14
16
18
20
22
24
SUNDAY 11:45
!
:
<
STD
C002604-B-04
12
14
16
18
20
22
24
SUNDAY 11:45
:
<
C002302-D-04
Checking / solution
Wait for ten seconds to see whether the fault
persists
Contact the professional who handles the
maintenance for the appliance
Contact the professional who handles the
maintenance for the appliance
The date scheduled for the service has been
reached.
If the
The installer's contact details are displayed.
Contact the professional who handles the
maintenance for the appliance
Contact the professional who handles the
maintenance for the appliance
Contact the professional who handles the
maintenance for the appliance
Contact the professional who handles the
maintenance for the appliance
1. Make a note of the code displayed.
The code is important for the correct and rapid diagnosis of the type of
malfunction and for any technical assistance that may be needed.
2. Press the
key.
If the code is displayed again, switch off the boiler and then switch it
back on.
3. Press the
key.
Follow the instructions displayed to solve the problem.
4. Consult the meaning of the codes in the table below.
symbol flashes, press the
300026440 - v06 - 07082018
key.
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