Status signals
Description
Code
Shutdown code
1
(1 times green signal) Temperature protection
5v[1
/
5v[2
/
5v[7
Shutdown code
2
(2 times green signal) Shutdown input
5v[10
/
5v[11
Shutdown code
3
(3 times green signal) Flame loss
5v[22
Shutdown code
4
(4 times green signal) Communication fault
5v[12
/
5v[13
/
5v[21
Shutdown code
5
(5 times green signal) Parameter or identification fault
5v[0
/
5v[16
/
5v[17
/
5v[18
/
5v[19
Shutdown code
6
(6 times green signal) Miscellaneous
5v[15
/
5v[25
The boiler starts up again automatically when the reason
for the blocking has been removed.
The shutdown codes from the status signals are related to the
shutdown codes that can be read by the
Recom
software or a suitable
controller. The meaning of the shutdown codes can be found in the
shutdown table:
Shutdown
code
Description
Probable causes
Checking / solution
5v[0
Parameter error
4
Parameters faulty
4
Reset
df
and
dV
4
Restore parameters with Recom
5v[1
Maximum flow temperature
exceeded
4
Non-existent or insufficient
circulation
4
Check the circulation (direction, pump,
valves)
4
Reasons for the heat demand
5v[2
Maximum increase of the
flow temperature has been
exceeded
4
Non-existent or insufficient
circulation
4
Sensor error
4
Check the circulation (direction, pump,
valves)
4
Check the water pressure
4
Check that the sensors are operating
correctly
4
Check that the sensor has been correctly
fitted
4
Check the cleanliness of the heat
exchanger
5v[7
Maximum difference
between the flow and return
temperature exceeded
4
Non-existent or insufficient
circulation
4
Sensor error
4
Check the circulation (direction, pump,
valves)
4
Check the water pressure
4
Check that the sensors are operating
correctly
4
Check that the sensor has been correctly
fitted
4
Check the cleanliness of the heat
exchanger
5v[10
Shutdown input is open
4
External cause
4
Parameter error
4
Bad connection
4
Suppress the external cause
4
Check the parameters
4
Check the wiring
5v[11
Shutdown input active or
frost protection active
4
External cause
4
Parameter error
4
Bad connection
4
Suppress the external cause
4
Check the parameters
4
Check the wiring
5v[12
Communication error with
the HMI PCB
4
Connection box not
connected
4
Check the wiring
(1) These lock-outs are not stored in the fault memory
9. Troubleshooting
Baxi MainEco Combi and System 24 - 28 - 35 / 18 - 24
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02092014 - 7619497-02