62
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
22
Voltage of DC
bus-bar is too
low
PL
OFF
3S and
blink 21
times
OFF
3S and
blink 12
times
During cooling and
drying operation,
compressor will stop
while indoor fan
operate; During heating
operation, the complete
unit will stop
1. Measure the voltage
of position L and N on
wiring board (XT), if
the voltage is higher
than 265VAC, turn on
the unit after the supply
voltage is increased to
the normal range; 2. If
the AC input is normal,
measure the voltage of
electrolytic capacitor C
on control panel (AP1),
if its normal, theres
malfunction for the
circuit, please replace
the control panel (AP1)
23
Compressor
Min frequence
in test state
P0
(during (during
Showing durin min
cooling or min heating
test
24
Compressor
rated frequence
in test state
P1
(during (during
Showing during
nominal cooling or
nominal heating test
25
Compressor
maximum
frequence in
test state
P2
(during (during
Showing during max
cooling or max heating
test
26
Compressor
intermediate
frequence in
test state
P3
(during (during
Showing during middle
cooling or middle
heating test
27
Overcurrent
protection of
phase current
for compressor
P5
OFF
3S and
blink 15
times
During cooling and
drying operation,
compressor will stop
while indoor fan
will operate; During
heating operationg, the
complete unit will stop
operation.
Refer to the
malfunction analysis
(IPM protection,
loss of synchronism
preoteciton and
overcurrent protection
of phase current for
compressor
28
Charging
malfunction of
capacitor
PU
OFF
3S and
blink 17
times
During cooling and
drying operation,
compressor will stop
while indoor fan will
operate; During heating
operationg the complete
unit will stop
Refer to the part three
- charging malfunction
analysis of capacitor
