Bosch CW 800 - Faults you can fix yourself

6 720 820 872 (2016/12)CR 400 | CW 400 | CW 800
Service menu | 45
7.6.2 Monitored values menu
This menu contains the heat system settings and measured
values. E.g. the flow temperature or current DHW temperature
is displayed.
Here, you can also find detailed information about system
units, e.g. the indoor unit temperature. The information and
values that are provided depend on the system that has been
installed. The technical information of accessory modules and
other system units must be observed.
Information in the Heating circuit 1...8 menu
The Status menu item under Set flow temp. shows the status
of the heating system. This status is decisive for the flow
temperature set value.
• Heating: heating circuit is in heating mode.
• Summer: heating circuit is in summer mode.
• No req.: no heat requirement (set room temperature = off).
• Req met: heat requirement met; room temperature at least
at set value.
• Scrd dry: screed drying is active for the heating circuit
(Æ Chapter 7.1.4, from page 39).
• Chim.: flue gas inspector function is active.
• Fault: there is a fault (Æ Chapter 8, from page 48).
• Frost: frost protection for the heating circuit is active
(Æ Tab. 15, from page 32).
• Run-on: overrun time is active for the heating circuit.
• Em. op.: emergency operation is active.
The Time program status menu item shows the status of the
constant heating circuit.
• On: with a heat requirement the constant heating circuit
may be heated (enabled).
• Off: also in case of a heat requirement the constant heating
circuit is not heated (disabled).
The MD status shows whether a heat requirement is present
for the constant heating circuit via the MD1 terminal of the
MM 100/MM 200 module.
• On: heat requirement via the MD1 terminal of the module
• Off: no heat requirement via the MD1 terminal of the
module
The Status menu item under Set room temp. shows the
current operating mode of the heating system. This status
determines the set room temperature.
• Heating, Setback (setback), Off:
Æ operating instructions.
• Setb. off: heating is switched off due to Setback type
(Æ page 38).
• Manual
:
Æ operating instructions.
• Man.lim: manual operation with limited duration is active
for the heating circuit (Æ operating instructions).
• Const.: constant set value; holiday program is active for
the heating circuit.
• Hold: switch-on optimisation is active for the heating
circuit (Æ operating instructions).