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Siemens Building Technologies Basic documentation RVD240 CE1P2384en
HVAC Products 10 Function block Indication of errors 27.05.2004
10 Function block Indication of errors
10.1 Operating line
Line Function, parameter Unit Factory setting Range
50 Indication of errors Display function
10.2 Indication of errors
Faults in the measuring circuits that are detected by the controller are indicated on the
display as
Er (error) and appear on operating line 50 with an error code:
Error code Cause
10 Error outside sensor B9
30 Error flow sensor heating circuit 1 (B1)
32 Error flow sensor B12
40 Error primary return sensor B7*
42 Error return sensor B71
43 Error return sensor B72
50 Error d.h.w. sensor B31
52 Error d.h.w. sensor B32
54 Error d.h.w. flow sensor B3
61 Error room unit heating circuit 1
62 Unit with wrong PPS identification connected heating circuit 1
66 Error room unit heating circuit 2
67 Unit with wrong PPS identification connected heating circuit 2
81 Short-circuit on data bus (LPB)
82 2 units with the same bus address (LPB)
86 Short-circuit PPS
100 2 clock time masters
120 Flow alarm common flow temperature
121 Flow alarm heating circuit flow heating circuit 1
122 Flow alarm heating circuit flow heating circuit 2
123 Flow alarm d.h.w. flow
140 Inadmissible bus address (LPB)
171 Alarm at input H5
180 Connection to heat meter at input H5 interrupted
181 Wrong configuration between operating lines 52 and 57
182 Wrong configuration between operating lines 52, 176 and 177 or
between 52 and 179
183 Wrong configuration between operating lines 171 and 177 or 176
* If maximum limitation of the secondary return temperature is activated (by making an entry on operating line
177; lowering against the primary limit value), no error message will be delivered
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