138
Message
System characteristics Cause
Measures
«
5A DHW sensor bottom
Operation with tempera-
ture value of the
upper
cylinder temperature
sensor. DHW heating is
blocked if only one sen-
sor is available or both
sensors are faulty.
Break, bottom cylinder
temperature sensor
Check resistance (Pt 500)
at connections 3X1.13
and 3X2.13; replace sen-
sor if required.
«
5C DHW solar
Break, Vitosolic cylinder
temperature sensor
Check sensor and replace
if required (see Vitosolic
installation and service
instructions).
«
60 Buffer cylinder sensor
Buffer cylinder is heated
once every hour. Heating
stops according to set
value of the return tem-
perature sensor.
Short circuit, buffer cylin-
der temperature sensor
Check resistance (Pt 500)
at connections 3X1.22
and 3X2.22; replace sen-
sor if required.
«
63 Ext. heat source
External heat source is
blocked. Instantaneous
heating water heater (if
installed) is enabled.
Short circuit, external
heat source temperature
sensor
Check resistance (Pt 500)
at connections 3X1.4 and
3X2.4; replace sensor if
required.
«
68 Buffer cylinder sensor
Buffer cylinder is heated
once every hour. Heating
stops according to set
value of the return tem-
perature sensor.
Break, buffer cylinder
temperature sensor
Check resistance (Pt 500)
at connections 3X1.22
and 3X2.22; replace sen-
sor if required.
«
6B Ext. heat source
External heat source is
blocked. Instantaneous
heating water heater (if
installed) is enabled.
Break, external heat
source temperature sen-
sor
Check resistance (Pt 500)
at connections 3X1.4 and
3X2.4; replace sensor if
required.
Troubleshooting
Control unit diagnostics
(cont.)
5414 828 GB
Содержание VITOCAL 350-A
Страница 54: ...54 5 3x 7 6 3x 3x 3x Installation sequence Fitting the outer panels cont 5414 828 GB ...
Страница 57: ...57 3x 8 9 3x 3x 3x Installation sequence Fitting the outer panels cont 5414 828 GB Installation ...
Страница 58: ...58 2x 10 11 3x 3x Installation sequence Fitting the outer panels cont 5414 828 GB ...
Страница 60: ...60 4 mm 4x 4x 4x 3 2 1 2 2 Installation sequence Fitting the silencer hoods only type AWH O 5414 828 GB ...
Страница 62: ...62 Type AWH I 1 Installation sequence Installing the heat pump cont 5414 828 GB ...
Страница 63: ...63 Type AWH O 2 3 4 5 4x 1 Installation sequence Installing the heat pump cont 5414 828 GB Installation ...
Страница 115: ...115 Fitting the front panel 1 2 Installation sequence Closing the heat pump cont 5414 828 GB Installation ...
Страница 227: ...227 053 032 039 034 038 033 034 039 040 027 Parts lists Parts list type AWH I cont 5414 828 GB Service ...
Страница 228: ...228 052 054 059 008 056 025 020 Parts lists Parts list type AWH I cont 5414 828 GB ...
Страница 236: ...236 053 032 039 034 038 033 034 039 027 Parts lists Parts list type AWH O cont 5414 828 GB ...
Страница 237: ...237 052 054 059 008 055 025 020 Parts lists Parts list type AWH O cont 5414 828 GB Service ...