137
Message
System characteristics Cause
Measures
«
4B Flow sensor system
Break, system flow tem-
perature sensor (down-
stream of heating water
buffer cylinder)
Check resistance (Pt 500)
at connections 3X1.9 and
3X2.9; replace sensor if
required.
«
50 DHW sensor top
Operation with tempera-
ture value of the
lower
cylinder temperature
sensor. DHW heating is
blocked if only one sen-
sor is available or both
sensors are faulty.
Short circuit, top cylinder
temperature sensor
Check resistance (Pt 500)
at connections 3X1.14
and 3X2.14; replace sen-
sor if required.
«
52 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.
Short circuit, bottom cyl-
inder temperature sen-
sor
Check resistance (Pt 500)
at connections 3X1.13
and 3X2.13; replace sen-
sor if required.
«
54 DHW solar
Short circuit, Vitosolic
cylinder temperature
sensor
Check sensor and replace
if required (see Vitosolic
installation and service
instructions).
«
58 DHW sensor top
Operation with tempera-
ture value of the
lower
cylinder temperature
sensor. DHW heating is
blocked if only one sen-
sor is available or both
sensors are faulty.
Break, top cylinder tem-
perature sensor
Check resistance (Pt 500)
at connections 3X1.14
and 3X2.14; replace sen-
sor if required.
Troubleshooting
Control unit diagnostics
(cont.)
5414 828 GB
Service
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 ...