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Troubleshooting
MB LAN – 6 720 802 641 (2012/08)
7
Used appliances
Used appliances contain valuable materials that should be recycled.
The various assemblies can be easily dismantled and synthetic materials
are marked accordingly. Assemblies can therefore be sorted by
composition and passed on for recycling or disposal.
6 Troubleshooting
The indicator shows the operating condition of the module.
For information on troubleshooting the router or
smartphone, see the relevant manufacturer's
instructions.
ON/OFF
indicator
Possible cause Remedy
Constantly
OFF
Power supply
interrupted.
B Switch ON power supply.
Power supply unit
cable not connected to
module.
B Make connection.
Power supply unit
faulty.
B Replace power supply unit.
Constantly
red
When commissioning
or restoring factory
settings: Neither BUS
nor LAN connection
available.
B Disconnect module from
power supply.
B Make BUS and LAN
connections.
B Recommission module.
Otherwise: internal
fault
B Replace module.
Flashing
red
LAN cable not
connected.
B Make LAN connection.
Router is switched off.
B Switch router on
1)
.
DHCP is disabled. B Enable DHCP at router
1)
.
Manually set MAC filter
prevents IP address
being issued.
B Set MAC filter for the MAC
address printed on the
enclosure (Æ Fig. 10, [1],
page 33).
No IP address available
for the module.
B Check router configuration
1)
.
LAN cable faulty.
B Replace LAN cable.
Alternating
red and
green
BUS and LAN
connection separated
after commissioning.
B Disconnect module from
power supply.
B Make BUS and LAN
connections.
B Recommission module.
Table 4 Fault table
6 720 647 836-01.1o
Constantly
orange
LAN connection
established; no access
to Junkers server via
internet.
B Disconnect module from
power supply for 10 seconds
and recommission it.
-or-
B Establish internet
connection
1)
.
-or-
B If internet access for the
router is periodically blocked,
remove the timeout
1)
.
-or-
B Open ports 5222 and
5223
1)
.
Flashing
green
Heat source switched
off.
B Switch ON heat source.
Module not connected
to BUS system.
B Make BUS connection.
Maximum cable length
for BUS connection
exceeded.
B Make shorter BUS
connection.
Short circuit or cable
break in the BUS
connection.
B Check BUS connection and
repair if required.
Constantly
green
No faults. Standard operation.
1) See manufacturer's instructions.
Faults with effects on the App function are also shown on
the App (e.g. no connection with the XMPP server, no
connection with the MB LAN, incorrect password, ...).
ON/OFF
indicator
Possible cause Remedy
Table 4 Fault table
7


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