Service Manual
Installation and Maintenance
26
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
7
Normal
communication
continously
8
High
temperature
resistant
protection
E8
OFF 3S
and blink
8
times
OFF 1S
and blink
6 times
During cooling
operation:
compressor will stop
while indoor fan
will operate.During
heating operation, the
complete unit stops.
Refer to the
malfunction analysis
(overload, high
temperature
resistant).
9
EEPROM
malfunction
EE
OFF 3S
and blink
15 times
OFF 1S
and blink
11 times
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
10
Limit/
decrease
frequency
due to high
temperature
of module
EU
OFF 3S
and blink
6 times
OFF 3S
and blink
6 times
All loads operate
normally,while
operation frequency
for compressor is
decreased
Discharging after the
complete unit
is de-energized 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.
11
Malfunction
protection of
jumper cap
C5
OFF 3S
and blink
15 times
Wireless remote
receiver and
button are effective,
but can not dispose
the related command
1. No jumper cap
insert on mainboard.
2. Incorrect insert of
jumper cap.
3. Jumper cap
damaged.
4. Abnormal detecting
circuit of mainboard.
12
Gathering
refrigerant
Fo
OFF 3S
and blink
1 times
OFF 3S
and blink
1 times
When the outdoor
unit receive signal of
Gathering refrigerant
,the system will be
forced to run under
cooling mode for
gathering refrigerant
Nominal cooling
mode
