No.
Malfunction Name
Dual-
8 Code
Display
Display Method of Outdoor Unit
A/C status
Possible Causes
Indicator has 3 kinds of display
status and during blinking, ON
0.5s and OFF 0.5s
Yellow
Indicator
Red
Indicator
Green
Indicator
21
Voltage for DC
bus-bar is too
high
PH
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 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
Showing during min. cooling or
min. heating test
24
Compressor rated
frequence in test
state
P1
Showing during nominal cooling
or nominal heating test
25
Compressor
maximum
frequence in test
state
P2
Showing during max. cooling or
max. heating test
26
Compressor
intermediate
frequence in test
state
P3
Showing during middle cooling or
middle heating test
27
Overcurrent
protection of
phase current for
compressor
P5
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 synchronism protection and
overcurrent protection of phase
current for compressor.
28
Charging
malfunction of
capacitor
PU
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
During heating operation, the
complete unit will stop
Refer to the part three—charging
malfunction analysis of capacitor
29
Malfunction
of module
temperature
sensor circuit
P7
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
During heating operation, the
complete unit will stop
Replace outdoor control panel
AP1
7
9
Service Manual
Installation and Maintenance
