Service Manual
Installation and Maintenance
29
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
Heat
Indicator
Yellow
Indicator
Red
Indicator
Green
Indicator
22
Voltage for
DC bus-bar
is too high
PH
OFF 3S
and blink
11 times
OFF 1S
and blink
13 times
During cooling and
drying operation,
compressor will stop
while indoor fan
will operate;During
heating operation, the
complete unit will stop
operation.
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
Voltage of
DC bus-bar
is too low
PL
OFF 3S
and blink
21 times
OFF 1S
and blink
12 times
During cooling and
drying operation,
compressor will stop
while indoor fan
will 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
150VAC,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)
24
Compressor
Min frequence
in test state
P0
(during
blinking,
ON
0.25s
and OFF
0.25s)
(during
blinking,
ON
0.25s
and OFF
0.25s)
Showing during
min. cooling or min.
heating test
