37
Installation and Maintenance
Service Manual
NO.
Malfunction
Name
Display Method of Indoor Unit
Display Method of Outdoor Unit
A/C status
Possible Causes
Dual-8
Code
Display
Indicator Display (during
blinking, ON 0.5s and OFF
0.5s)
Indicator has 3 kinds of display
status and during blinking, ON
0.5s and OFF 0.5s
Operation
Indicator
Cool
Indicator
Heating
Indicator
Yellow
Indicator
Red
Indicator
Green
Indicator
53
Normal
communica-
tion
54
Defrosting
OFF 3S
and blink
once
(during
blinking,
ON 10s
and OFF
0.5s)
OFF 0.5S
and blink
once
OFF 1S
and blink
twice
Defrosting will occur in
heating
mode. Compressor will
operate
while indoor fan will stop
operation.
Its the normal state
