More Settings; Diagnosis Menu; Troubleshooting; Status Indicator Of The Module (Integrated In The Coding Switch) - Bosch ME 200 Installationsanleitung Für Den Fachmann

Meu item Setting area: function description
Hyst. for boiler block 0 ... 5 ... 50 K: the boiler block is activated if the system
setpoint is measured at the buffer top sensor (TB1). If
the temperature of the buffer cylinder falls below the set
temperature minus the value set here (switching
differential) for a certain period (Boiler release
wait.time), the conventional heat source is released.
Boiler release 0 ... 30 ... 240 min: if the switching differential (Hyst.
wait.time for boiler block) is undercut for the duration set here,
the conventional heat source is released.
Notes:
The waiting time until boiler release is reduced to 15
minutes if no rise in temperature of the alternative heat
source is detected following release.
If the alternative heat source is not in operation (e.g.
summer phase), the setting Heat source > Config.
blocking mode in the customer menu can be adjusted
(e.g. Never).
Config. of N/C: contact is during an interlock and closed when the
2)
block.terminal conventional heat source is released.
N/O: contact is closed during an interlock and opened
when the conventional heat source is released.
1) Can only be set on control unit MX 25 from V1.44, ACU M/Hx (GC9800iW,
GC7800iW, GC5x00iW, ...). Conf. DHW blocking mode only possible from
MX 25 V1.5.
2) If noEMS 2 is detected, the blocking of the conventional heat source is via
connecting terminal OEV (EV/I3-connection at heat source for external
interlock).
Table 12 Blocking mode
4.5

More settings

For DHW systems via MM 100: when using the optional system flow
temperature sensor TB4, the pump can be operated for charging the
DHW cylinder temperature controlled( Fig. 28).
4.6

Diagnosis menu

Which menus, information or values are available depend on which
system has been installed. Observe the technical documentation for the
heat source, control unit, additional modules and other system
components.
Function test
If a ME 200 module is installed, the menu Function test > AHS type is
displayed.
The function of the devices connected to the module can be tested in this
menu. The pump in the return of the alternative heat source can be
selectively switched on/off, for example.
Monitored values
If a ME 200 module is installed, the menu Monitored values > AHS type
is displayed.
You can call up information on the current status of the devices
connected to the module in this menu. You can display the flow and
return temperature of the alternative heat source here, for example.
ME 200 – 6721841615 (2021/11)
5

Troubleshooting

Use only original spare parts. Damage caused by the use of spare parts
not supplied by the manufacturer is excluded from the warranty.
▶ If a fault cannot be rectified, please contact your local service
engineer.
The status indicator at the coding switch shows the operating condition
of the module. Additional status indicators are:
[1] Alternative heat source
[2] Heat source bypass valve/heating circuit pump 1
[3] Buffer cylinder
[4] Block of conventional heat source
These status indicators only become valid after the configuration wizard
has been exited and the setting of all other menu items have been made.
4 5 6
3
2
1
0
Fig. 1
5.1 Status indicator of the module (integrated in the
coding switch)
Status indicator Possible cause
Constantly OFF Power supply
interrupted.
Faulty fuse
Short-circuit in the
BUS connection
Constantly red Temperature sensor
was briefly
connected
incorrectly.
Coding switch in
invalid position or in
intermediate
position.
Only with stand-
alone alternative
heat source: outside
temperature sensor
defective
Internal fault.
Flashing yellow Initialisation, i.e.
configuration wizard
is running.
Constantly green Coding card set to 0. ▶ Adjust the coding switch
No fault
Table 13
Troubleshooting
1 2 3 4
7
8
9
10
0010014042-001
Remedy
▶ Turn on the mains power supply.
▶ When the power supply is
switched off, replace the fuse
( Fig. 16 at end of this
document).
▶ Check BUS connection and
repair if necessary.
▶ Turn the module off and back on.
▶ Adjust the coding switch
▶ Check temperature sensor.
▶ If values do not match, replace
the sensor.
▶ Check voltage at temperature
sensor terminals in the module.
▶ If the sensor values match but
the voltage values do not,
replace the module.
▶ Replace the module.
–
Normal Operation
39