Rendamax E8.1121, Operating Instructions Manual, Page: 41 / 44

Operation
Installation and Start-up
System bus
The heating system
This controller can be expanded in a
modular fashion using additional
modules that are connected via the
integrated bus. In its maximum
configuration, the system can be used
to control the following heating system
components
1-8
Heat generator (modulating or
switching)
1-15
Mixed weather-dependent
heating circuits
0-15 Room controller (digital or
analogue)
1
Solar system (2 collectors,
2 storage tanks)
1 Solid fuel heat generator
The various components are simply
coupled to the system bus. The
modules log on to the system auto-
matically and search for their
communication partners via the defined
BUS ID (heating circuit number or heat
generator number).
Bus ID
For mixer motor controllers and
control units
The bus ID (00-15; expert level
parameter) is used to number the
heating circuits in the system. Each
operating module and each mixer
motor module is given the number of
the assigned heating circuit as its
bus ID.
-
Heating circuit numbers (00-15)
may not be assigned twice.
- Heating circuit numbers 00 and 01
may not be used simultaneously.
- The heating circuits are
sequentially numbered starting
with "01".
- Please only use heating circuit
number 00 for replacement
controllers if "00" was used in the
replaced controller.
Pre-settings
heating circuit 1 Î 01
heating circuit 2 Î 02
!
After setting all the bus ID's the
system must be reenergised
(once only).
41
Error messages
If a fault or error occurs in the heating
system, you will see a blinking warning
triangle (
E
) and the related error
number on the controller display.
Please refer to the table below for the
significance of the displayed error code.
The system must be restarted after a
fault has been remedied => RESET.
RESET
Brief device shut-off (mains switch).
Controller restarts, reconfigures itself
and continues to operate with the
values that have already been set.
RESET+
Ä
Overwrite all settings with default
values (except language, time and
sensor values).
The additional button (
Ä ) must be
pressed when the controller is
switched on (mains on) until
"EEPROM" appears in the display.
Error no. Error description
Communication error
E 90 ID 0 and 1 on bus. Bus IDs 0 and 1 may not be used
simultaneously.
E 91 Bus ID used. The set bus ID is already in use by another
device.
Internal error
E 81 EEPROM error. The invalid value has been replaced with
the default value
E
Check parameter values!!!
E 69 Flow sensor HC2
E 70 Flow sensor HC1
E 75 Outdoor sensor
E 76 Storage tank sensor
E 78 Boiler sensor
E 79 Sensor multifunction relay 1
E 80 Room sensor HC1
E 83 Room sensor HC2 / Lower buffer sensor / Pool sensor
Sensor error (break/short)