Service Manual

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Error
Code
LED1
(green)
LED2
(red)
Symptom Cause Corrective action
4101 11
blinks
Overcurrent
error of the
remote con-
troller terminal
Shorting between the remote control-
ler terminals
Check the remote controller wiring.
The group contains two or more Loss-
nay units with the same address.
Set unique addresses to these
units.
M-NET transmission cable is con-
nected to the remote controller termi-
nal block (TM4 [1] [2]).
Connect the M-NET transmission
cable to the M-NET transmission
cable terminal block (TB5 [A] [B]).
Three or more remote controllers are
connected.
Up to two remote controllers can
be connected.
Circuit board failure Replace the control circuit board.
Remote controller failure Replace the remote controller.
4116 1
blink
or
6
blinks
(*1)
Abnormal rota-
tion of the sup-
ply fan motor
(Centrifugal fan
does not work,
insufficient
motor speed,
excessive
motor speed,
or rotation
detected when
operation is
stopped)
Faulty connection of the supply
fan motor connector (CN10) on the
power circuit board
Check the connector (CN10)
connection.
<For LGH-F300 to 600 types>
Faulty connection of the connectors
(CN19–CN119) between the control
circuit board and power circuit board
Check the connector connections
(CN19 – CN119).
<For LGH-F940 and 1200 types>
Faulty connection of the connectors
(CN19–CN119) between the control
circuit board and power circuit board
(lower unit)
(CN21–CN121) between the control
circuit board and power circuit board
(upper unit)
Check the connector connections
(CN19–CN119) and (CN21–CN121).
The model selection switch (SW6) is
not set correctly.
Make the SW6 setting appropriate
for the model.
(See Chapter 8. (8) Setting status
record (page 52).)
The temperature around the product
is high.
Use the product at a temperature
of 104°F (40°C) or lower.
The motor and centrifugal fan are not
fixed securely.
Check the installation state of the
motor and centrifugal fan, and fix
them securely.
Deformed centrifugal fan Replace the centrifugal fan.
Foreign objects around the centrifu-
gal fan
Check the air course and around
the centrifugal fan, and remove
any foreign matter.
Fan motor failure Replace the fan motor.
(See page 19.)
Circuit board failure Replace the power circuit board.
(*1) 1 blink for LGH-F300 to 600 types
1 or 6 blinks for LGH-F940 and 1200 types