64
Fault Displays
9,000 and 12,000 btuh units
No.
Malfuntiuon
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
0.5ws and OFF 0.5s
Operation
Indicator
Cool
Indicator
Heating
Indicator
Yellow
Indicator
Red
Indicator
Green
Indicator
35
IPM protection H5
OFF
3S and
blink 5
times
OFF
3S and
blink 4
times
During cooling and
drying operation,
compressor will stop
while indoor fan will
operate; During heating
operation, the complete
unit will stop operation.
Refer to the malfunction
analysis (IPM
protection, loss of
syncrhonism protection
and overcurrent
protection of phase
current for compressor.
36
Module
temperature is
too high
H5
OFF
3S and
blink 5
times
OFF
3S and
blink 10
times
37
Internal motor
(fan motor) do
not operate
H6
OFF 3S
and blink
11 times
Internal fan motor,
external fan motor,
compressor and electric
heater stop operationg,
guide louver stops and
present location.
1. Bad contact of
DC motor feedback
terminal; 2. Bad
contact of DC motor
control end; 3. Fan
motor is stalling; 4.
Motor malfunction;
5. Malfunction of
mainboard rev detecting
circuit
38
H7
OFF
3S and
blink 7
times
During cooling and
drying operation,
compressor will
stop while indoor
fan operate; During
heating operationg, the
complete unit will stop
operation.
Refer to the malfunction
analysis (IPM
protection, loss of
syncrhonism protection
and overcurrent
protection of phase
current for compressor.
39
PFC protection HC
OFF
3S and
blink 6
times
OFF
3S and
blink 14
times
During cooling and
drying operation,
compressor will
stop while indoor
fan operate; During
heating operationg, the
complete unit will stop
operation.
Refer to the malfunction
analysis (IPM
protection, loss of
syncrhonism protection
and overcurrent
protection of phase
current for compressor.
40
Outdoor DC
fan motor
malfunction
L3
OFF 3S
and blink
23 times
OFF
3S and
blink 14
times
Outdoor DC fan motor
malfunction lead
to compressor stop
operation.
DC fan motor
malfunction or
system blocked or the
connector loosed
