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Building Technologies
Modular Heating Controller RMH760B
CE1P3133en
HVAC Products
15 Fault tracing aids
05.02.2007
Number Name
For explanation, refer to
section / subsection…
74
DHW flow sensor primary error
75
DHW flow sensor sec error
76
DHW flow sensor cons error
77
DHW return sensor error
321
Flue gas temp sensor error
2101
Legionella protection error
2202
Main contr h’request mod error
2203
Prim contr h’request mod error
2301
Boiler burner fault
2311
Burner no checkback signal
2321 Boiler
water
shortage
2331 Boiler
overpressure
2341 Boiler
underpressure
2351
Shutoff valve no checkb signal
2361
Flue gas overtemperature
2371
Boiler test operation active
2401 [Boiler
pump]
overload
2411
[Boiler pump] no flow
2421
[Boiler pump B] overload
2431
[Boiler pump B] no flow
2441
[Boiler pump] fault
2491
[Main pump] overload
2492
[Main pump B] overload
2493
[Main pump] no flow
2494
[Main pump B] no flow
2495
[Main pump] fault
2501
[System pump] overload
2502
[System pump B] overload
2503
[System pump] no flow
2504
[System pump B] no flow
2505
[System pump] fault
2521
[Heat circuit 1 pump] overload
2522
[Heat circuit 1 pump B] overload
2523
[Heat circuit 1 pump] no flow
2524
[Heat circuit 1 pump B] no flow
2525
[Heat circuit 1 pump] fault
2531
[Heat circuit 2 pump] overload
2532
[Heat circuit 2 pump B] overload
2533
[Heat circuit 2 pump] no flow
2534
[Heat circuit 2 pump B] no flow
2535
[Heat circuit 2 pump] fault
2541
[Heat circuit 3 pump] overload
2542
[Heat circuit 3 pump B] overload
2543
[Heat circuit 3 pump] no flow
2544
[Heat circuit 3 pump B] no flow
2545
[Heat circuit 3 pump] fault
2551
[DHW primary pump] overload