I-63
A-070336_EN • Rev. A
A
dditionAl
i
nformAtion
for
the
i
nstAller
Error code
Fault description
Explanation
Action(s)
335
Sensor input BX21 without
function
Connect temperature sensor
in BX terminal
336
Sensor input BX22 without
function
Connect temperature sensor
in BX terminal
341
Sensor B6 missing
Solar sensor missing
Check parameters, connec-
tion and component.
350
Buffer storage tank address error
Correct device address.
351
Primary controller/ system
pump, address error
Correct device address.
352
Pressureless header, address
error
Correct device address.
353
Sensor B10 missing
Common flow sensor missing
Check parameters, connec-
tion and component
378
Internal repetition
Contact AIC technical sup-
port
382
Repetition speed
Contact AIC technical sup-
port
384
Extraneous light
Shut off gas supply and con-
tact AIC technical support
385
Mains undervoltage
Check electric supply in boil-
er terminals
386
Fan speed tolerance
Check air supply
388
DHW sensor no function
Check connection and sen-
sor. Replace as required.
391
Room controller 1
Check addresses and pa-
rameters
392
Room controller 2
393
Room controller 3
426
Feedback flue gas damper
Check the connection and
component
427
Configuration flue gas damper
Check configuration param-
eters
429
Dynamic water pressure too
high
Expansion tank is defective
Verify pump
Replace expansion tank
430
Dynamic water pressure too low
Verify pump
431
Sensor primary heat exchanger
Check connection and sen-
sor. Replace as required.
432
Function ground not connected
Check ground connection
and install as required
433
Temperature primary heat ex-
changer too high
Check the heating system
external hydraulic compo-
nents.