18
6600
6601
6607
• If it has been
confirmed that a unit
with the same M-NET
address is transmitting.
• When discrimination
of the polarity of the
M-NET transmission
wire.
• If there is no response
(ACK) from the
recipient after a
transmission.
• If there are two or more
units with the same
M-NET address at the
unit and controller.
• Interrupted power supply,
Connectors (CN405,
CN45, CN21, CN71).
Damage to transformer
(T2).
• Interrupted power supply
for M-NET transmission
wire.
• If recipient of transmission
is LM ADAPTER.
• Defect in transmission
line (TB2)between
LM ADAPTER.
• Interrupted power
LM ADAPTER
power supply (TB1).
• Blown fuse (F1) in
LM ADAPTER
disconnection on the
loose connector
(CN605, CN65, CN32,
CN33, CN31).
• Damage transformer in
LM ADAPTER (T1, T2).
Damage circuit board
(L.B, P.B).
• Check that there are no
duplicate addresses.
After correcting
problem, reset power
supply.
• Check for defects. Once
corrected, reset the
power supply.
• Check these areas.
After correcting
problem, reset power
supply.
Error
code
Error content
Symptom
Cause
Checking method and remedy
M-NET
duplication
error
M-NET polarity
not set error
No ACK error
7702
7703
7705
Display of trouble
M-NET remote controller,
MA remote controller,
system controller
M-NET remote controller,
MA remote controller,
system controller
M-NET remote controller,
MA remote controller,
system controller or
building control system
M-NET remote controller,
MA remote controller,
system controller
M-NET remote controller,
MA remote controller,
system controller
M-NET remote controller,
MA remote controller,
system controller
M-NET connection
error (no connection
to indoor unit or
LOSSNAY unit)
M-NET connection
error (no connection
to master system
controller)
DIP SW1-2 is OFF and
the system controller is
connected.
DIP SW1-2 is ON and
the system controller is
not connected.
Initialization error
Could not connect to
any indoor units or
LOSSNAY units.
Initialization of the LM
ADAPTER failed.
Reset the power supply.
If the same error occurs
again, the controller is
faulty.
Damage in LM ADAPTER.
• M-NET transmission
cable is not connected.
• Power supply is not
connected to M-NET
transmission cable.
• The DIP SW1-2 setting is
different to the system
configuration.
• Power supply is not
connected to indoor unit
or LOSSNAY unit.
• M-NET transmission
cable is not connected.
• Power supply is not
connected to M-NET
transmission cable.
• Check these areas.
After correcting
problem, reset power
supply.
• Check these areas.
After correcting
problem, reset power
supply.
6-3 Error code list
