Table of Contents
Advertisement
MCA 35
Code Messages
B07
BL.DT OUTL RET.
B08
BL.RL OPEN
B09
BL.INV. L/N
B10
BL.BL INPUT OPEN
B11
B13
BL. PCU COM
BL.COM PCU-D4
B14
BL.WATER MIS.
B15
BL.GAS PRESS
B16
BL.BAD SU
B17
BL.PCU ERROR
B18
BL.BAD PSU
B19
BL.NO CONFIG
B21
BL. COM SU
15/06/12 - 300022160-001-01
Description
Maximum difference between
the flow and return
temperature exceeded
The RL inlet on the PCU PCB
terminal block is open
Set the type of generator again in the menu #CONFIGURATION (Refer to the original rating
plate )
The BL inlet on the PCU PCB
terminal block is open
Communication error with the
SCU PCB
The water pressure is lower
than 0,8 bar
Gas pressure too low
The SU PCB is not recognised Wrong SU PCB for this boiler
The parameters saved on the
PCU PCB are impaired
The PSU PCB is not
recognised
The boiler has not been
configured
Communication error between
the PCU and SU PCBs
Checking / solution
The water flow in the installation is insufficient
Check the circulation (direction, pump, valves)
4
Check the water pressure
4
Check the cleanliness of the heat exchanger
4
Sensor error
Check that the sensors are operating correctly
4
Check whether the boiler sensor has been correctly fitted
4
Parameter error
Set the type of generator again in the menu
4
#CONFIGURATION (Refer to the original rating plate)
Bad connection
Check the wiring
4
The contact connected to the BL inlet is open
Check the contact on the BL inlet
4
Parameter error
Check the parameter IN.BL
4
Bad connection
Check the wiring
4
Bad connection
Check the wiring
4
SCU PCB not installed in the boiler
Install an SCU PCB
4
Not enough water in the circuit
Top up the installation with water
4
Incorrect setting of the gas pressure switch on the SCU PCB
Check that the gas valve is fully opened
4
Checking the gas supply pressure
4
Check whether the gas pressure control system has been
4
correctly fitted
Replace the gas pressure control system if need be
4
Replace the SU PCB
4
Parameter error on the PCU PCB
Replace the PCU PCB
4
Wrong PSU PCB for this boiler
Replace the PSU PCB
4
The PSU PCB has been changed
Set the type of generator again in the menu
4
#CONFIGURATION (Refer to the original rating plate)
Bad connection
Check that the SU PCB has been correctly put in place on
4
the PCU PCB
Replace the SU PCB
4
8. Troubleshooting
105
Advertisement
Table of Contents
