Display Codes; Code Types In The Display; Reset; Operating And Fault Codes - Bosch Condens 5000W Installation And Maintenance Instructions Manual

Display codes

12 Display codes
Display codes give an indication of the operating condition of the wall
mounted gas condensing boiler. Fault codes are either shown in the
display directly or can be called up via the information menu. Proceed as
follows:
▶ Open information menu ( Chapter 7.1).
▶ Switch to the fault code level in the information menu.
▶ Read out the fault code and look up meaning ( tab. 14).
12.1

Code types in the display

There are 3 types of code:
▶ – normal operating code
▶ Blocking fault code
▶ Interlocking fault code
12.3

Operating and fault codes

Code Code Designation
type
- - 2 0 8
The wall mounted gas condensing boiler is in flue
gas inspector mode.
- - 2 0 0
The wall mounted gas condensing boiler is in
heating mode.
- - 2 0 1
The wall mounted gas condensing boiler is in DHW
mode.
- - 2 0 2
The wall mounted gas condensing boiler is waiting.
There was a heat energy demand from the on/off
or modulating control more frequently than 1x
every 10 minutes.
- - 2 0 3
The wall mounted gas condensing boiler is on
standby.
- - 2 0 4
The wall mounted gas condensing boiler is waiting.
The actual flow temperature is higher than the
calculated or selected boiler temperature.
- - 2 1 2
The actual temperature recorded by the flow
temperature sensor or the safety sensor is rising
too quickly.
- - 2 2 6
Diagnosis tool was connected.
- - 2 6 0
The flow temperature sensor is not detecting a rise
in temperature following a burner start.
- - 2 6 5
The wall mounted gas condensing boiler is waiting.
In response to a heat energy demand, the wall
mounted gas condensing boiler regularly switches
to partial load.
- - 2 6 8
Component test phase.
- - 2 7 0
The wall mounted gas condensing boiler ramps up.
- - 2 8 3
The wall mounted gas condensing boiler is
preparing for a burner start. The fan and pump are
activated.
32
12.2

Reset

For safety reasons, the wall mounted gas condensing boiler shuts down
and locks as soon as a serious fault occurs. The fault code flashes to
indicate this. The wall mounted gas condensing boiler must be reset in
order to unlock it. Proceed as follows:
▶ Press the "reset" key ( figure 38, [2], page 19), until "rE" appears
in the display.
Generally, the wall mounted gas condensing boiler will operate normally
again after a reset. However, in some cases the fault is more far-reaching
and must first be eliminated.
Remedy
▶ Check the boiler temperature at the wall mounted gas condensing
boiler. Increase the above if necessary.
▶ Check the heating curve that has been set once the weather-
dependent control has been adjusted. Increase the above if
necessary.
▶ Check the wiring and function of the cylinder temperature sensor.
Replace the component if necessary.
▶ Check the water pressure of the wall mounted gas condensing boiler
and vent the heating system and wall mounted gas condensing
boiler.
▶ Check whether it is possible to achieve a sufficient flow via the
heating system.
▶ Check the operating characteristics and cabling of the pump and
corresponding sensor. Replace the component if necessary.
▶ Check the water pressure of the wall mounted gas condensing boiler
and vent the heating system and wall mounted gas condensing
boiler.
▶ Check whether it is possible to achieve a sufficient flow via the
heating system.
▶ Check the cabling and operating characteristics of the pump and the
flow temperature sensor. Replace the component if necessary.
Condens 5000W – 6720813952 (2019/02)