Troubleshooting; Environment / Disposal - Bosch MZ 100 Notice D'installation

5

Troubleshooting

Use only original spare parts. Any damage resulting from
spare parts that are not supplied by the manufacturer is
excluded from liability.
If a fault cannot be rectified, please contact the
responsible service engineer.
The indicator shows the operating condition of the module.
3
2
1
A number of faults are also shown in the display of the corresponding
user interface.
Indicator Possible cause
permanently off Coding card on 0
(at coding switch I)
Power supply
interrupted.
Fuse is defective
Short circuit in the
BUS connection
permanently red Internal fault
(at coding switch I)
flashing red Coding switch to
(at coding switch I invalid position or in
or temperature intermediate position
switch II)
flashing green Maximum cable length
(at coding switch I) for BUS connection
exceeded.
 Fault shown on
user interface display
I/O controller or room
thermostats installed
without BUS
connection and the
DHW temperature in
the cylinder is not
reached within 3
hours.
No BUS participant;
no setpoint received.
Temperature sensor is
faulty.
permanently green No fault
(at coding switch I)
Table 10 Troubleshooting
MZ 100
4 50 60
40
70
S
Y off
0 max
I II II
6 720 804 106-23.1O
Remedy
▶ Set the coding card.
▶ Switch on the power
supply.
▶ When the power
supply is switched
off, replace the fuse
( Fig. 25, page 63).
▶ Check BUS
connection and repair
if required.
▶ Replace module.
▶ Set the coding card.
▶ Make shorter BUS
connection.
▶ The user interface
instructions and the
service manual
contain further
information on
troubleshooting.
▶ Operation alternates
between heating/
DHW
▶ Check heat exchanger
for limescale
deposits, descale if
necessary.
▶ Check BUS
connection and repair
if required.
▶ Replace temperature
sensor.
Standard operation.
6

Environment / disposal

Environmental protection is a fundamental corporate strategy of the
Bosch Group.
The quality of our products, their efficiency and environmental safety
are all of equal importance to us and all environmental protection
legislation and regulations are strictly observed.
We use the best possible technology and materials for protecting the
environment taking into account of economic considerations.
Packaging
We participate in the recycling programmes of the countries in which our
products are sold to ensure optimum recycling.
All of our packaging materials are environmentally friendly and can be
recycled.
Old electrical and electronic appliances
Electrical or electronic devices that are no longer
serviceable must be collected separately and sent for
environmentally compatible recycling (in accordance
with the European Waste Electrical and Electronic
Equipment Directive).
To dispose of old electrical or electronic devices, you
should use the return and collection systems put in place
in the country concerned.
Troubleshooting | 13
6 720 815 281 (2014/10)