ƲƳ
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
Oper-
ation
Indicator
Cool
Indica-
tor
Heat-
ing
Indica-
tor
Yellow
Indica-
tor
Red
Indica-
tor
Green
Indicator
19
Decrease
frequency
due to
high air
discharge
F9
OFF 3S
and
blink
9 times
OFF 1S
and
blink
twice
All loads operate normally,
while
operation frequency for
compressor is decreased
Overload or temperature is too
high; Refrigerant is insufficient;
Malfunction of electric expansion
valve (EKV)
20
Limit/
decrease
frequency
due to
antifreezing
FH
OFF 3S
and
blink
2 times
OFF 3S
and
blink
2 times
OFF 1S
and
blink
4 times
All loads operate normally,
while operation frequency for
compressor is decreased
Poor air-return in indoor unit or
fan
speed is too low
21
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)
22
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)
23
Compressor
Min
frequence in
test state
P0
(during
blinking,
ON
0.25s
and
OFF
0.25s)
(during
blink-
ing,
ON
0.25s
and
OFF
0.25s)
Showing during min. cooling or
min. heating test
24
Compressor
rated
frequence in
test state
P1
(during
blinking,
ON
0.25s
and
OFF
0.25s)
(during
blink-
ing,
ON
0.25s
and
OFF
0.25s)
Showing during nominal cooling
or nominal heating test
25
Compressor
maximum
frequence in
test state
P2
(during
blinking,
ON
0.25s
and
OFF
0.25s)
(during
blink-
ing,
ON
0.25s
and
OFF
0.25s)
Showing during max. cooling or
max. heating test
