Lockouts
Error
code
349
350
351
352
353
371
372
373
349
350
351
352
353
371
372
373
386
388
426
427
431
432
433
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Description of error
Buffer return valve Y15 not available
Puffer address sensor
Primary controller / system pump address error
Pressureless header address error
Common flow sensor B10 not available
Flow temperature 3 (heating circuit 3) supervision
Limit thermostat heating circuit 3
Extension module 3 error (collective error)
Buffer return valve Y15 not available
Puffer address sensor
Primary controller / system pump address error
Pressureless header address error
Common flow sensor B10 not available
Flow temperature 3 (heating circuit 3) supervision
Limit thermostat heating circuit 3
Extension module 3 error (collective error)
Fan speed has lost valid range
DHW error no function
Feedback flue gas damper
Configuration flue gas damper
Sensor primary heat exchanger
Functional earth not connected
Temperature primary heat exchanger to high
29