328 080000 01
37
Specifications subject to change without notice.
TROUBLESHOOTING
Table 23—Flashing LED of Indoor/Outdoor Unit and Primary Judgment
NO.
MALFUNCTION
NAME
Display Method of Indoor Unit
Display Method of
Outdoor Unit
AC 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
Heating
Indicator
Yellow
Indicator
Red
Indicator
Green
Indicator
1
High pressure
protection of system
E1
OFF 3s:
blinks once
During the cooling and drying
operation, all loads stop operating
except the indoor fan. During the
heating operation, the entire unit stops.
Possible reasons:
1.
Refrigerant is superabundant;
2.
Poor heat exchange (including a bad
radiating environment ); the ambient
temperature is too high.
2
Anti-freeze
protection
E2
OFF 3S:
blinks twice
OFF 1S:
blinks
3 times
During the cooling and drying
operation, the compressor and outdoor
fan stop while the indoor fan operates.
1.
Poor air-return in indoor unit;
2.
Fan speed is abnormal;
3.
Evaporator is dirty.
3
In defect of
refrigerant
F0
OFF 1S:
blinks
9 times
The Dual-8 Code screen displays the
F0 code and the entire unit stops.
1.No refrigerant;
2.Indoor evaporator temperature sensor has
failed;
3.The unit has been plugged up somewhere.
4
High discharge
temperature
protection of
compressor
E4
OFF 3S:
blinks
4 times
OFF 1S:
blinks
7 times
During the cooling and drying
operation, the compressor and outdoor
fan stop while the indoor fan operates.
During the heating operation, all loads
stop.
Refer to the malfunction analysis (discharge
protection, overload).
5
Overcurrent
protection
E5
OFF 3S:
blinks
5 times
OFF 1S:
blinks
5 times
During the cooling and drying
operation, the compressor and outdoor
fan stop while the indoor fan operates.
During the heating operation, all loads
stop.
1.
Supply voltage is unstable;
2.
Supply voltage is too low and the load is
too high;
3.
Evaporator is dirty.
6
Communication
Malfunction
E6
OFF 3S:
blinks
6 times
Always ON
During the cooling operation, the
compressor stops while the indoor fan
motor operates. During the heating
operation, the entire unit stops.
Refer to the corresponding malfunction
analysis.
7
High temperature
resistant
protection
E8
OFF 3S:
blinks
8 times
OFF 1S:
blinks
6 times
During the cooling operation: the
compressor stops while the indoor fan
operates. During the heating operation,
the entire unit stops.
Refer to the malfunction analysis (overload,
high temperature resistant).
8
EEPROM
malfunction
EE
OFF 3S:
blinks 15
times
OFF 1S:
blinks
11 times
During the cooling operation: the
compressor stops while the indoor fan
operates. During the heating operation,
the entire unit stops.
Replace outdoor control panel AP1
9
Limit/ decrease
frequency due to
high temperature of
module
EU
OFF 3S:
blinks 6
times
OFF 3S:
blinks 6
times
All loads operate normally, while the
operation frequency for the compressor
decreases.
Discharging after the complete unit is
de-energized for 20mins, check whether
thermal grease on the IPM Module of
outdoor control (in the radiator) is inserted
tightly. If its not, replace the control panel
AP1.
10
Malfunction
protection of
jumper cap
C5
OFF 3S:
blink15 times
Wireless remote receiver and button are
effective, however can not transmit 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.
11
Gathering refrigerant
Fo
OFF 3S:
blinks 1 time
OFF 3S:
blinks 1
time
OFF 1S:
blinks 17
times
When the outdoor unit receives a signal
for gathering refrigerant ,the system is
forced to run under the cooling mode
to gather refrigerant
Nominal cooling mode
12
Indoor ambient
temperature sensor
is open/short
circuited
F1
OFF 3S:
blinks once
During cooling and drying operation,
the indoor unit operates while other
loads stop; during the heating
operation, the entire unit stops
operating.
1.
Loosening or a bad contact on the indoor
ambient temp. sensor and mainboard
terminal.
2.
Components in the mainboard fell down
leading to a short circuit.
3.
Indoor ambient temp. sensor is damaged
(check the sensor resistance value chart).
4.
Mainboard damaged.
13
Indoor evaporator
temperature sensor
is open/short
circuited
F2
OFF 3S:
blinks twice
AC stops operating once it reaches the
setting temperature. Cooling, drying:
internal fan motor stop operating while
the other loads stop operating. Heating
and air conditioner stop operating.
1.
Loosening or a bad contact on the indoor
ambient temp. sensor and mainboard
terminal.
2.
Components on the mainboard fall
down leading to a short circuit.
3.
Indoor evaporator temp. sensor damaged
(check temp. sensor value
chart for testing).
4.
Mainboard damaged.
14
Outdoor ambient
temperature sensor
is open/short
circuited
F3
OFF 3S:
blinks 3
times
OFF 1S:
blinks 6
times
During the cooling and drying
operating, compressor stops while
indoor fan operates; During the heating
operation, the entire unit leading to a
short circuit stops operating.
Outdoor temperature sensor has not been
connected well or is damaged. Check it by
referring to the resistance table for
temperature sensor.
15
Outdoor condenser
temperature sensor
is open/short
circuited
F4
OFF 3S:
blinks 4
times
OFF 1S:
blinks 5
times
During the cooling and drying
operating, compressor stops while
indoor fan operates; During the heating
operation, the entire unit leading to a
short circuit stops operating.
Outdoor temperature sensor has not been
connected well or is damaged. Check it by
referring to the resistance table for
temperature sensor.
16
Outdoor discharge
temperature sensor
is open/short
circuited
F5
OFF 3S:
blinks 5
times
OFF 1S:
blinks 7
times
During the cooling and drying
operation, the compressor stops after
operating for about 3 mins,
while indoor fan still operates. During
the heating operation, the entire unit
stops after operating for about 3 mins.
1.Outdoor temperature sensor has not been
connected well or is damaged. Check it by
referring to the resistance table for
temperature sensor
2.The temperature sensor head has not been
inserted into the copper tube.
17
Limit/ decrease
frequency due to
overload
F6
OFF 3S:
blinks for 6
times
OFF 1S:
blinks 3
times
All loads operate normally, while the
operation frequency for the compressor
decreases.
Refer to the malfunction analysis (overload,
high temperature resistant)
18
Decrease frequency
due to overcurrent
F8
OFF 3S:
blink 8
times
OFF 1S:
blinks once
All loads operate normally, while the
operation frequency for the compressor
decreases.
The input supply voltage is too low. System
pressure is too high and overloads.
