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Blinking
Display Method of Indoor Unit
Malfunction
Name
Indicator Display (during blinking,
ON 0.5s and OFF 0.5s)
Dual-8
No.
Code
Display
Operation
High
pressure
OFF
1
protection
of
E1
and
system
once
OFF
Antifreezing
and
2
E2
protection
twice
High
discharge
OFF
temperature
3
E4
and blink 4
protection
of
times
compressor
OFF
Overcurrent
4
E5
and blink 5
protection
times
OFF
Communication
5
E6
and blink 6
Malfunction
times
High
OFF
temperature
6
E8
and blink 8
resistant
times
protection
Circuit PG motor
(indoor fan) has
OFF
circuit
and
7
U8
for
malfunction
by
zero
cross
times
detection
PG
motor
OFF
(indoor
fan
8
H6
and
motor) does not
11 times
operate
Malfunction
OFF
9
protection
of
C5
and
jumper cap
15 times
Indoor
ambient
temperature
10
sensor
is
F1
open/short
circuited
Indoor
evaporator
temperature
11
F2
sensor
is
open/short
circuited
Display
Outdoor Unit
Indicator has 3 kinds of
display status and they
will
circularly every 5s.
OFF
COOL
Heating
D40 D41 D42 D43
Indicator
Indicator
Indicator
3s
blink
3S
blink
3S
3S
3S
3S
3S
blink
17
3S
blink
3S
blink
OFF
3S
and blink
once
OFF
3S
and blink
twice
Method
of
be
displayed
A/C status
ON
Blink
During
cooling
operation,
except
operates, all loads stop operation.
During
heating operation, the
complete unit stops.
During
cooling
operation,
compressor
outdoor fan stop while indoor fan
operates.
During
cooling
operation,
compressor
outdoor fan stop while indoor fan
operates.
During
operation, all loads stop.
During
cooling
operation,
compressor
outdoor fan stop while indoor fan
operates.
During
operation, all loads stop.
During
cooling
compressor stops while indoor fan
motor operates. During heating
operation, the complete unit stops.
During
cooling
compressor will stop while indoor
fan will operate. During heating
operation, the complete unit stops.
Operation of remote controller or
control panel is available, but the
unit won't act.
The
complete
operation.
The
complete
operation.
During
cooling
operation, indoor unit operates
while other loads will stop; during
heating operation, the complete
unit will stop operation.
During
cooling
operation, indoor unit will operate
while other loads will stop; During
heating operation, the complete
unit will stop operation.
Possible Reasons
Possible
reasons:
and
drying
superabundant; 2. Poor heat exchange (including
indoor
fan
filth blockage of heat exchanger and bad radiating
environment );
Ambient temperature is too high.
and
drying
1. Poor air-return in indoor unit;
and
2. Fan speed is abnormal;
3. Evaporator is dirty.
and
drying
and
Please refer to the malfunction analysis (discharge
protection, overload).
heating
and
drying
1. Supply voltage is unstable;
and
2. Supply voltage is too low and load is too high;
3. Evaporator is dirty.
heating
operation,
Refer to the corresponding malfunction analysis.
operation:
Refer to the malfunction analysis (overload, high
temperature resistant).
1. Control board is damaged.
Poor connection for PGF in circuit diagram;
unit
will
stop
Malfunction of indoor unit's control panel AP1;
Malfunction of indoor unit's motor M1.
Poor connection for the jumper cap on indoor unit's
unit
will
stop
control panel AP1; please reinsert or replace the
jumper cap;
and
drying
1.Room temperature sensor hasn't been connected
well with indoor unit's control panel AP1 (refer to the
wiring diagram for indoor unit);
2.Room temperature sensor is damaged (please
refer to the resistance table of temperature sensor)
and
drying
1.Room temperature sensor hasn't been connected
well with indoor unit's control panel AP1 (refer to the
wiring diagram for indoor unit);
2.Room temperature sensor is damaged (please
refer to the resistance table of temperature sensor)
1.
Refrigerant
was
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