72
#
Malfunction
Name
Indoor Unit Display
Method
Outdoor Unit
Display Method
(repeated every 5
seconds)
o = O
n = Illuminated
« = Blink
A/C Status Possible Causes
Indoor
Display
Operation
Indicator
1
High pressure
protection of
system
E1
OFF 3S and
blink once
o « « «
During cooling and drying op-
eration, except indoor fan op-
erates, all loads stop operation.
During heating operation, the
complete unit stops
Possible reasons: 1. Refrig-
erant was superabundant;
2. Poor heat exchange
(including lth blockage
of heat exchanger and bad
radiating environment);
Ambient temperature is
too high
2
Anti-freezing
protection
E2
OFF 3S and
blink twice
n o n o
During cooling and drying
operation, compressor and
outdoor fan stop while indoor
fan operates
1. Poor air-return in indoor
unit; 2. Fan speed is abnor-
mal; 3. Evaporator is dirty
3
High discharge
temperature
protection of
compressor
E4
O 3S and
blink 4 times
n o n «
During cooling and drying
operation, compressor and
outdoor fan stop while indoor
fan operates. During heating
operation, all loads stop.
Please refer to the malfunc-
tion analysis (discharge
protection, overload).
4
Overcurrent
protection
E5
O 3S and
blink 5 times
o n « o
During cooling and drying
operation, compressor and
outdoor fan stop while indoor
fan operates. During heating
operation, all loads stop.
1. Supply voltage is unsta-
ble; 2. Supply voltage is too
low and load is too high; 3.
Evaporator is dirty.
5
Communica-
tion Malfunc-
tion
E6
O 3S and
blink 6 times
o o o «
During cooling operation,
compressor stops while indoor
fan motor operates. During
heating operation, the com-
plete unit stops.
Refer to corresponding
malfunction analysis
6
High tempera-
ture resistant
protection
E8
O 3S and
blink 8 times
n o n n
During cooling operation,
compressor stops while indoor
fan motor operates. During
heating operation, the com-
plete unit stops.
Refer to the malfunction
analysis (overload, high
temperature resistant).
7
Internal motor
(fan motor) do
not operate
H6
O 3S and
blink 11 times
Internal fan motor, external
fan motor, compressor and
electric heater stop operation,
guide louver stops at present
location
1. Bad contact of DC mo-
tor feedback terminal; 2.
Bad contact of DC motor
control end; 3. Fan motor
is stalling; 4. Motor mal-
function; 5. Malfunction
of mainboard rev detecting
circuit
8
Malfunction
protection of
jumper cap
C5
O 3S and
blink 15 times
Wireless remote receiver and
button are e ective, but can
not dispose the related com-
mand
1. No jumper cap insert on
mainboard; 2. Incorrect
insert of jumper cap; 3.
Jumper cap damaged; 4.
Abnormal detecting circuit
of mainboard.
Troubleshooting 18,000/24,000 btuh Units
To Next Page
Loading...