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Siemens Building Technologies
Basic Documentation RVL471
CE1P2524E
HVAC Products
7 Function block "Enduser general"
23.10.2002
7.4 Indication
of
errors
The following errors are indicated:
Number
Fault
10
Open-circuit or short-circuit in the outside sensor’s measuring circuit (B9)
30
Open-circuit or short-circuit in the measuring circuit of the flow / boiler
sensor (B1)
40
Open-circuit or short-circuit in the measuring circuit of the return tem-
perature sensor on the primary side (B7)
42
Open-circuit or short-circuit in the measuring circuit of the return tem-
perature sensor on the secondary side (B71)
50
Fault in the measuring circuit of the d.h.w. storage tank sensor / thermo-
stat 1 (B31)
52
Fault in the measuring circuit of the d.h.w. storage tank sensor / thermo-
stat 2 (B32)
54
Open-circuit or short-circuit in the measuring circuit of the d.h.w. sensor
(B3)
60
Open-circuit or short-circuit in the measuring circuit of the room sensor
(B5)
61
Open-circuit or short-circuit in the measuring circuit of the room unit’s
sensor (A6)
62
Wrong room unit connected
81
Short-circuit on data bus (LPB)
82
Bus address on the data bus (LPB) exists several times
100
2 clock masters on the data bus (LPB)
120
Flow alarm (for explanation, refer to function block "Service functions and
general settings")
140
Inadmissible bus address or inadmissible plant type
If a fault occurs, the LCD displays
ERROR
.
In interconnected plants, the address (device and segment number) of the controller
causing the fault is indicated on all the other controllers. No address will appear on the
controller causing the fault.
Example of display in interconnected plants:
50
10
2
03
= operating line
= error number
= segment number
= device number
The error message disappears only after rectification of the fault. There will be no ac-
knowledgement!
