Mitsubishi Electric LGH-15RVX3-E Handbook page 37

Error LED1 LED2
Code (green) (red)
6606 3 Transmission/
blinks reception error
(communica-
tion error with
transmission
processor)
6607 8 Transmission/
blinks reception error
(no ACK error)
6608 8 Transmission/
blinks reception error
(no response
error)
6801 9 PZ-43SMF-E
blinks communica-
tion error
(*3) This refers to devices assigned an address number in MELANS such as the Lossnay unit, City Multi indoor
unit, City Multi outdoor unit, or system controller.
Symptom
Faulty connection of the M-NET
transmission cable
Wiring was performed with power
•
still supplied to the M-NET trans-
mission cable.
Accidental communication error
•
Malfunction of the unit (*3) where an
error occurs
The power of the Lossnay unit is not
ON.
The Lossnay address was changed. Check the Lossnay address.
PZ-62DR-EA/EB is connected to the
terminals (TB5 [A] [B]).
Multiple M-NET transmission cables
are wired using multicore cables.
The M-NET transmission cable is not
securely connected.
The wiring length of the M-NET trans-
mission cable is longer than specified.
• Max. extension: 200 m
• Total extension: 500 m
PZ-62DR-EA/EB is connected to the
terminals (TB5 [A] [B]).
Multiple PZ-43SMF-E transmission
cables are wired using multicore
cables.
The power supply cable is too close
to the PZ-43SMF-E transmission
cable.
Faulty connection of the
PZ-43SMF-E transmission cable
The wiring length of the PZ-43SMF-E
transmission cable is longer than
specified (200 m or more).
PZ-43SMF-E is connected to the ter-
minals (TB5 [A] [B]).
Cause
─ 37 ─
Corrective action
Check the items described in (1)
[2].
Restart the system after complet-
ing wiring.
If the error re-occurs, check for
noise on the transmission cable.
If the above does not correct the
problem, replace the Lossnay con-
trol circuit board.
Check the unit (*3) where the error
occurs.
Check the power of the Lossnay
unit.
Connect PZ-62DR-EA/EB to the
terminals (TM4 [1] [2])
(See the Lossnay Operating/
Installation Instructions or
PZ-62DR-E Instruction Book.)
Using the applicable cable, wire
the transmission cable away from
one another.
Check the transmission cable
connections.
Check the wiring length of the
transmission cable.
Connect PZ-62DR-EA/EB to the
terminals (TM4 [1] [2]).
(See the Lossnay Operating/
Installation Instructions or
PZ-62DR-E Instruction Book.)
Using the applicable cable, wire
the transmission cable away from
one another.
Wire the power supply cable at
least 5 cm away from the transmis-
sion cable.
Check the transmission cable
connections.
Check the wiring length of the
transmission cable.
Connect PZ-43SMF-E to the termi-
nals (TM4 [1] [2]).
(See the Lossnay Operating/
Installation Instructions or
PZ-62DR-E Instruction Book.)