58
Fault Displays
9,000 and 12,000 btuh units
No.
Malfuntiuon
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
0.5ws and OFF 0.5s
Operation
Indicator
Cool
Indicator
Heating
Indicator
Yellow
Indicator
Red
Indicator
Green
Indicator
1
High pressure
protection of
system
E1
OFF 3s
and blink
once
During cooling and
drying operation, except
indoor fan operates, all
loads stop operation.
During heating
operation, the complete
unit stops.
Possible reasons:
1. Refrigerant was
superabundant; 2.
Poor heat exchange
(including filth blockage
of heat exchanger
and bad radiating
environment); Ambient
temperature is too high.
2
Antifreezing
protection
E2
OFF 3S
and blink
twice
OFF
3S and
blink 3
times
During cooling and
drying operation,
comporessor and
outdoor fan stop while
indoor fan operates.
1. Poor air-return in
indoor unit; 2. Fan
speed is abnormal; 3.
Evaporator is dirty
3
System block
or refrigerant
leakage
E3
OFF 3S
and blink
3 times
OFF
3S and
blink 9
times
The Dual-8 Code
Display will show E3
until the low pressure
switch stop operation.
1. Low-pressure
protection; 2. Low
pressure protection
of system; 3. Low
pressure protection of
compressor
4
High discharge
temperature
protection of
compressor
E4
OFF 3S
and blink
4 times
OFF
3S and
blink 7
times
During cooling and
drying operation,
compressor and outdoor
fan stop while indoor
fan operates. During
heatin operation, all
loads stop
Please refer to the
malfunction analysis
(discharge protection,
overload).
5
Overcurrent
protection
E5
OFF 3S
and blink
5 times
OFF
3S and
blink 5
times
During cooling and
drying operation,
compressor and outdoor
fan stop while indoor
fan operates. During
heatin operation, all
loads stop
1. Supply voltage is
unstable; 2. Supply
voltage is too low and
load is too high; 3.
Evaporator is dirty.
All manuals and user guides at all-guides.com
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