Service Manual
Installation and Maintenance
31
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
31
Module high
temperature
protection
P8
OFF 3S
and blink
19 times
During cooling
operation,compressor
will stop while indoor
fan will operate;
During heating
operation, the
complete unit will stop
After the complete
unit is deenergized
for 20mins, check
whether the thermal
grease on IPM
Module of outdoor
control panel
AP1 is sufficient and
whether the
radiator is inserted
tightly. If its no
use, please replace
control panel
AP1.
32
Decrease
frequency
due to high
temperature
resistant
during
heating
operation
HO
OFF 3S
and blink
10 times
All loads operate
normally,
while operation
frequency for
compressor is
decreased
Refer to the
malfunction analysis
(overload, high
temperature
resistant)
33
Static
dedusting
protection
H2
OFF 3S
and blink
twice
34
Overload
protection for
compressor
H3
OFF 3S
and blink
3 times
OFF 1S
and blink
8 times
During cooling and
drying operation,
compressor will stop
while indoor fan
will operate;During
heating operation, the
complete unit will stop
operation.
1. Wiring terminal
OVC-COMP
is loosened. In
normal state, the
resistance for this
terminal should
be less than 1ohm.
2.Refer to the
malfunction analysis (
discharge protection,
overload)
35
System is
abnormal
H4
OFF 3S
and blink
4 times
OFF 1S
and blink
6 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
(overload, high
temperature
resistant)
