Error Code List - Mitsubishi Electric LMAP04-E Installation Manual

6-3 Error code list

Error
Display of trouble
code
6600 M-NET remote controller,
MA remote controller,
system controller
6601 M-NET remote controller,
MA remote controller,
system controller
M-NET remote controller,
6607
MA remote controller,
system controller or
building control system
M-NET remote controller,
7302
MA remote controller,
system controller
M-NET remote controller,
7303
MA remote controller,
system controller
7305
M-NET remote controller,
MA remote controller,
system controller
Error content Symptom
M-NET • If it has been
duplication confirmed that a unit
error with the same M-NET
address is transmitting.
• When discrimination
M-NET polarity
of the polarity of the
not set error
M-NET transmission
wire.
No ACK error • If there is no response
(ACK) from the
recipient after a
transmission.
M-NET connection
Could not connect to
error (no connection any indoor units or
to indoor unit or LOSSNAY units.
LOSSNAY unit)
M-NET connection DIP SW1-2 is OFF and
error (no connection the system controller is
to master system connected.
controller) DIP SW1-2 is ON and
the system controller is
not connected.
Initialization of the LM
Initialization error
ADAPTER failed.
Cause
• 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).
• 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.
• 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.
Damage in LM ADAPTER.
19
Checking method and remedy
• 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.
• Check these areas.
After correcting
problem, reset power
supply.
• Check these areas.
After correcting
problem, reset power
supply.
Reset the power supply.
If the same error occurs
again, the controller is
faulty.