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Siemens Building Technologies
Basic Documentation RVP540 / RVP550
CE1P2488en
HVAC Products
Description of the heating engineer settings
18.10.2002
4.68 Frost protection for the plant
with the boiler pump
“Frost protection for the plant with boiler pump” can be switched on and off.
Setting range
Unit
Factory setting
0 / 1
–
1
0
“General frost protection for the plant”
does not act
on the boiler pump of the
oil- or gas-fired boiler.
1
“General frost protection for the plant”
acts
on the boiler pump of the oil- or
gas-fired boiler.
If the “General frost protection for the plant” (operating line 180
EXP
) is switched off, the
setting made on this operating line (271) has no impact.
A detailed description of the impact of frost protection for the plant is given on operating
line 180
EXP
.
Diagnosis
4.69 Display of BMU error code
•
Straightforward
checking
of
plant.
•
Fault tracing is made easier.
For the BMU, the RVP540 / RVP550 can display an error message with the associated
error code. The error will automatically be displayed on this operating line.
Display
Unit
1...255
Error code
Error messages cannot be deleted. They disappear only after the relevant fault has
been rectified.
The meaning of the different error codes depends of the make of BMU used. For this
reason, no overview can be given here. For details, please refer to the technical docu-
mentation of the relevant product.
0
4
8
12
16
20
24
1
2
3
4
5
6
7
8
9 10
23
92
Z
1
8
The BMU displays error code 175.
If there is a BMU error code, operating line 50 also displays a general BMU error (error
code 150).
Description
Setting
Effect
Notes
Benefit
Description
Setting
Note
Display
Example:
Note
