43
Installation and Maintenance
Service Manual
NO.
Malfunction
Name
Display Method of Indoor Unit
A/C status Possible Causes
Dual-8
Code
Display
Indicator Display (during
blinking, ON 0.5s and OFF
0.5s)
Operation
Indicator
Cool
Indicator
Heating
Indicator
53
Normal
communica-
tion
54
55
Defrosting
U8
56 JF
Not the error code. It’s the
status code for the operation
The complete unit stops
1.Power supply is abnormal;
2.Detection circuit of indoor
control mainboard is abnormal.
WIFI
communica-
tion
malfunction
Loads operate normally,
while the unit can’t be
normally controlled by APP.
57 E9
Cold air
prevention
protection
Not the error code. It’s the
status code for the operation
58 oE
Undefined
outdoor unit
error
Cool: compressor and
outdoor fan stops operation,
while indoor fan operates;
Heat: compressor, outdoor
fan and indoor fan stop
operation.
1.Main board of indoor unit is
damaged;
2.Detection board is damaged;
3.The connection between
indoor unit and detection board
is not good;
Heating
indicator
off for
0.5s and
then
blinks
for 10s
1. Outdoor ambient temperature
exceeds the operation range of
unit (eg: less than-20oC or more
than 60oC for cooling; more than
30oC for heating);
2. Failure startup of compressor?
3. Are wires of compressor not
connected tightly?
4. Is compressor damaged?
5. Is main board damaged?
To Next Page
Loading...
