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Line
Function
D.h.w. values
26
Nominal setpoint of the d.h.w. temperature (TBWw)
TBWR
Line 770
TBWmax
Line 750
EXP
Heating circuit values
27
Reduced setpoint of the room temperature (TRRw)
TRF
Line 28
TRN
Setpoint knob
28
Frost protection setpoint of the room temperature
(TRFw)
TRR
Line 27
29
Summer / winter changeover temperature
30
Slope of the heating curve
33
Actual value of the room temperature (TRx)
General
34
Actual value of the outside temperature (TAx)
To set the attenuated outside temperature to Tax, press the + / -
buttons simultaneously for 3 s
38
Resetting the enduser parameters
To reset the parameters of the enduser level to their standard
values, press the + / - buttons simultaneously for 3 s
39
Resetting the heating circuit and d.h.w. time switch
programs
To reset the time switch programs of the enduser level to their
standard values, press the + / - buttons simultaneously for 3 s
Holiday program
40
Preselection of the holiday period
41
Beginning of the holiday period
--.--
Inactive
To deactivate the set holiday period, press the + / - buttons si-
multaneously for 3 s
42
End of the holiday period
--.--
Inactive
To deactivate the set holiday period, press the + / - buttons si-
multaneously for 3 s
General / service
50
Indication of error signals
No display = no fault
10 = fault outside sensor
20 = fault boiler sensor oil / gas B2
25 = fault boiler sensor wood B22
26 = fault common flow sensor B10
28 = fault flue gas sensor B8
30 = fault flow sensor heating circuit B1
33 = fault flow sensor heat pump B21
40 = fault return sensor oil / gas B7
43 = fault return sensor wood B72
44 = fault return sensor heat pump B71
47 = fault common return sensor B73
50 = fault storage tank sensor / thermostat B3
52 = fault storage tank sensor / thermostat B31
55 = fault storage tank sensor / thermostat B32
56 = fault storage tank sensor / thermostat B33
61 = fault room unit
70 = fault storage tank sensor B4
71 = fault storage tank sensor B41
72 = fault storage tank sensor B42
73 = fault collector sensor B6
74 = fault collector sensor B61
75 = fault solar flow sensor B62
76 = fault storage tank sensor B43
79 = fault water / brine sensor B11
81 = short-circuit data bus (LPB)
82 = same bus address exists several times
86 = short-circuit PPS
100 = 2 clock time masters on the data bus (LPB)
127 = legionella temperature not reached
130 = maximum flue gas temperature exceeded
Siemens Building Technologies / HVAC Products
Range
Unit
TBWR...TBW
°C
max
TRF...TRN
°C
4...TRR
°C
8...30
°C
1.0...40
–
0...50
°C
-50...+50
°C
0 / 1
–
0 / 1
–
1...8
–
--.-- /
Day /
01.01...31.12
month
--.-- /
Day /
01.01...31.12
month
74 319 0312 0 a
Resolution
Factory
setting
...... °C
55
...... °C
16
...... °C
10
...... °C
17
......
15
–
–
–
–
–
0
–
0
......
1
.... . ....
--.--
day /
month
.... . ....
--.--
day /
month
19.08.2002
7/28
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