109
0
10
20
30
40
50
60
70
80
90
100
120
140
160
180
200
220
240
110
130
150
170
190
210
230
250
-1.0
1.0
3.0
7.0
5.0
MPa
Pressure bar
-0.1
0.1
0.3
0.7
0.5
Value in "Diagnosis"
Fault "F7"Fault "F7"
A
Fault "E6"
Fault "F7"
Fig. 66
A
Permissible range
Checking the secondary circuit temperature limiter
For the installation position in the appliance, see dia-
gram on page 103.
If the burner control unit cannot be reset after a fault
shutdown, even though the secondary circuit flow tem-
perature is below approx. 75 °C, check the following:
1.
Pull the leads from the temperature limiter.
2.
Check continuity of the temperature limiter with a
multimeter.
3.
Remove faulty temperature limiter.
4.
Coat the new temperature limiter with heat con-
ducting paste and install it.
5.
After commissioning, press reset button
R
on the
Vitotronic control unit.
6. If the fault persists:
Check high limit safety cut-out.
Maintenance
Checking the pressure sensor
(cont.)
5678 044 GB
Maintenance
Summary of Contents for D2RA
Page 113: ...113 Maintenance Checking the Vitotronic 200 H accessories cont 5678 044 GB Maintenance ...
Page 133: ...133 Parts lists Sorption module hydraulics cont 5678 044 GB Components ...
Page 136: ...136 0001 0002 0003 0004 0005 Fig 83 Parts lists Miscellaneous 5678 044 GB Components ...
Page 163: ...163 5678 044 GB ...
