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Display Method of Indoor Unit
Indicator Display (during
Malfunction
blinking, ON 0.5s and OFF
Dual-8
NO.
Name
0.5s)
Code
Display
Operation
Indicator
OFF 3S
Gathering
11
F0
and blink
refrigerant
1 times
Indoor
ambient
temperature
12
F1
sensor is
open/short
circuited
Indoor
evaporator
temperature
13
F2
sensor is
open/short
circuited
Outdoor
ambient
temperature
14
F3
sensor is
open/short
circuited
Outdoor
condenser
temperature
15
F4
sensor is
open/short
circuited
Outdoor
discharge
temperature
16
F5
sensor is
open/short
circuited
Limit/
decrease
17
frequency
F6
due to
overload
Decrease
frequency
18
F8
due to
overcurrent
Display Method of Outdoor
Indicator has 3 kinds of
display status and during
blinking, ON 0.5s and OFF
0.5s
Cool
Heating
Yellow
Indicator
Indicator
Indicator
Indicator
OFF 3S
and blink
1 times
OFF 3S
and blink
once
OFF 3S
and blink
twice
OFF 3S
OFF 3S
and blink
blink
3 times
6 times
OFF 3S
OFF 3S
and blink
blink
4 times
5 times
OFF 3S
OFF 3S
and blink
blink
5 times
7 times
OFF 3S
OFF 3S
and blink
for 6
blink
times
3 times
OFF 3S
OFF 3S
and blink
blink
8 times
once
Unit
A/C status
Red
Green
Indicator
When the outdoor unit receive
signal of Gathering refrigerant
,the system will be forced to
run under cooling mode for
gathering refrigerant
During cooling and drying
operation, indoor unit operates
while other loads will stop;
during heating operation,
the complete unit will stop
operation.
AC stops operation once
reaches the setting
temperature. Cooling, drying:
internal fan motor stops
operation while other loads
stop operation; heating: AC
stop operation
During cooling and drying
operating, compressor stops
and
while indoor fan operates;
During heating operation,
the complete unit will stop
operation
During cooling and drying
operation, compressor stops
and
while indoor fan will operate;
During heating operation,
the complete unit will stop
operation.
During cooling and drying
operation, compressor will sop
after operating for about 3
and
mins,
while indoor fan will operate;
During heating operation, the
complete unit will stop after
operating for about 3 mins.
All loads operate normally,
and
while
operation frequency for
compressor is decreased
All loads operate normally,
and
while
operation frequency for
compressor is decreased
Possible Causes
Nominal cooling mode
1. Loosening or bad contact of
indoor ambient temp. sensor and
mainboard terminal.
2. Components in mainboard fell
down leads short circuit.
3. Indoor ambient temp. sensor
damaged.(check with sensor
resistance value chart)
4. Mainboard damaged.
1. Loosening or bad contact of
Indoor
evaporator temp. sensor and
mainboard terminal.
2. Components on the mainboard
fall
down leads short circuit.
3. Indoor evaporator temp. sensor
damaged.(check temp. sensor
value
chart for testing)
4. Mainboard damaged.
Outdoor temperature sensor
hasnt been connected well or
is damaged. Please check it by
referring to the resistance table for
temperature sensor)
Outdoor temperature sensor
hasnt been connected well or
is damaged. Please check it by
referring to the resistance table for
temperature sensor)
1.Outdoor temperature sensor
hasnt been connected well or is
damaged. Please check it by
referring to the resistance table for
temperature sensor)
2.The head of temperature sensor
hasnt been inserted into the copper
tube
Refer to the malfunction analysis
(overload, high temperature
resistant)
The input supply voltage is too low;
System pressure is too high and
overload
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