SERVICE MANUAL
R
−
410A Ductless Split System: DLF4(A/H), DLC4(A/H)
421 08 9204 00
49
UNIT 12K, 230 Volts
Malfunction
Indoor Unit Displaying Method
State of lamps of outdoor unit
PCB
Reasons
Double
8 Code
Display
Indicator Display
(LED Flash 0.5s
−
ON/0.5s
−
OFF
Error
Code
Running
LED
Cooling
LED
Heating
LED
Green
LED2
Red
LED3
Yellow
LED4
Stop for anti
−
freeze
protection of indoor
−
unit
E2
flash 2
times
Flash 4
Times
Flash
3 Times
Refrigerant leakage. Indoor unit air
flow blocked. Filter dirty.
Stop for discharge temp
protection
E4
flash 4
times
Flash
7 Times
Low refrigerant. Capillary blocked.
Ambient temp is abnormal.
Overcurrent protection
E5
flash 5
times
Flash
5 Times
Low voltage, ambient temp is
abnormal.
Stop for communication
error
E6
flash 6
times
No Flash
Communication line failure. Main
PCB failure. Outside interference.
Wiring error. Condensate pump
failure.
Stop for compressor
overload protection
H3
flash 3
times
Flash
8 Times
Compressor overheat. Low
refrigerant. Capillary blocked.
Overload protection
H4
flash 4
times
Flash
6 Times
Ambient temp is abnormal. Heat
exchanger blocked.
Stop for IPM module
protection
H5
flash 5
times
Flash
4 Times
IPM module over temperature. Low
voltage. Silica grease problem
Indoor unit fan motor does
not operate
H6
flash 11
times
Motor control terminal contact
problem. Fan does not rotate
smoothly due to incorrect
installation. Motor or control panel
is damaged.
Indoor ambient temperature
sensor malfunction
F1
flash 1
times
Bad terminal connection. Temp
sensor malfunction.
Indoor tube temperature
sensor malfunction
F2
flash 2
times
Bad terminal connection. Temp
sensor malfunction.
Outdoor ambient
temperature sensor
malfunction
F3
flash 3
times
Flash 6
Times
Bad terminal connection. Temp
sensor malfunction.
Outdoor tube temperature
sensor malfunction
F4
flash 4
times
Flash 5
Times
Bad terminal connection. Temp
sensor malfunction.
Outdoor discharge
temperature sensor
malfunction
F5
flash 5
times
Flash 7
Times
Bad terminal connection. Temp
sensor malfunction.
Jumper connection
malfunction protection
C5
flash 15
times
No jumper on controller or installed
improperly or damaged.
Corresponding circuit on mainboard
has malfunction.
Unit match protection
LP
Flash
16 Times
Indoor and outdoor units not
matched.
Indoor fan speed detection
circuit malfunction
U8
Abnormal speed detection circuit
on mainboard.
PFC overcurrent malfunction
HC
flash 6
times
Flash
14 Times Overcurrent on PFC.
High power protection
L9
Flash
9 Times
System power is too high.
High voltage protection
PH
flash 11
times
Flash
13 Times DC side voltage is too high.
Low voltage protection
PL
flash 21
times
Flash
12 Times DC side voltage is too low.
Automatic defrosting
H1
flash 1
times
Flash
2 Times
H1 signal normal operation, heat
pump only.
Remark
1. Error codes only can be seen in the type which has the temperature display PCB. Some types do not have this
function and have only the LED’s on the outdoor PCB.
2. If there is normal communication between the Indoor and Outdoor unit the green LED will be on, and flashing.
