
Code
Messages
Description
Checking / solution
B07
BL.DT OUTL RET.
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
B08
BL.RL OPEN
The
RL
inlet on the PCU
PCB terminal block is open
Parameter error
4
Set the type of generator again in the menu
#CONFIGURATION
(Refer to the original rating plate)
Bad connection
4
Check the wiring
B09
BL.INV. L/N
Set the type of generator again in the menu
#CONFIGURATION
(Refer to the original rating
plate )
B10
B11
BL.BL INPUT OPEN
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
B13
BL. PCU COM
Communication error with
the SCU PCB
Bad connection
4
Check the wiring
SCU PCB not installed in the boiler
4
Install an SCU PCB
B14
BL.WATER MIS.
The water pressure is lower
than 0,8 bar
Not enough water in the circuit
4
Top up the installation with water
B15
BL.GAS PRESS
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
B16
BL.BAD SU
The SU PCB is not
recognised
Wrong SU PCB for this boiler
4
Replace the SU PCB
B17
BL.PCU ERROR
The parameters saved on
the PCU PCB are impaired
Parameter error on the PCU PCB
4
Replace the PCU PCB
B18
BL.BAD PSU
The PSU PCB is not
recognised
Wrong PSU PCB for this boiler
4
Replace the PSU PCB
B19
BL.NO CONFIG
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)
B21
BL. COM SU
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
8. Troubleshooting
AGC 10/15 - AGC 15 - AGC 25 - AGC 35
104
20/01/2012 - 300026081-001-B