Service manual

Operation start
Check the outdoor unit
LED indicator.
J Check of power supply
See page 119.
• Indoor unit
serial signal
error
K Check of
serial signal
See page 119.
• COOL or
HEAT
operation only
L Check of
R.V.coil
See page 120.
• When cooling,
room does not
cool.
N Check of
inverter,
compressor
See page 121.
• When cooling, heat
exchanger of
non-operating indoor
unit frosts.
•When heating, non-
operating indoor unit
gets warm.
M Check of LEV
See page 121.
• When cooling,
dew drops in the
non-operating
indoor unit.
Check of mis-
piping
• When heating,
room does not get
warm.
N Check of
inverter, compressor
See page 121.
Check mis-piping,
shortage of capacity
Refer to indicator list
on page 108, 109.
OFF
Both LED 1 and
LED 2 lighting
LED 1 or LED 2
has blinked.
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