I-83
H-093630_EN • 00
A
dditionAl
i
nformAtion
for
the
i
nstAller
Error
code
Fault description
Explanation
Action(s)
325
Input BX/extension mod-
ule, same sensors
Check configuration in parameters list.
326
Input BX/mixing group,
same sensors
Check configuration in parameters list.
328
Mixing group, same func-
tion
Check configuration in parameters list.
329
Extension module/mixing
group same function
Check configuration in parameters list.
330
Sensor input BX1 without
function
Connect temperature sensor in BX
terminal
331
Sensor input BX2 without
function
Connect temperature sensor in BX
terminal
332
Sensor input BX3 without
function
Connect temperature sensor in BX
terminal
333
Sensor input BX4 without
function
Connect temperature sensor in BX
terminal
349
Buffer storage tank return
valve Y15 missing
Check connection of return valve Y15.
Replace as required.
350
Buffer storage tank ad-
dress error
Correct device address.
352
Pressureless header, ad-
dress error
Correct device address.
353
Sensor B10 missing
Common flow sensor missing
Check parameters, connection and
component
378
Internal repetition
Contact AIC technical support
382
Repetition speed
Contact AIC technical support
384
Extraneous light
Shut off gas supply and contact AIC
technical support
385
Mains undervoltage
Check electric supply in appliance ter-
minals
386
Fan speed tolerance
Check air supply
388
DHW sensor no function
Check connection and sensor. Replace
as required.
426
Feedback flue gas damper
Check the connection and component
427
Configuration flue gas
damper
Check configuration parameters
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 ex-
changer
Check connection and sensor. Replace
as required.
432
Function ground not con-
nected
Check ground connection and install as
required
433
Temperature primary heat
exchanger too high
Check the heating system external hy-
draulic components.