SERVICE MANUAL R−410A Ductless Split System: DLF4(A/H), DLC4(A/H)
421 08 9204 00 53
UNIT 18K & 24K, 230 Volts (Cont.)
Malfunction
Indoor Unit Display
Outdoor unit display
(LED’s have 3 modes)
OFF, ON, Flash
Operation Status Malfunction
Error
Code
Display
Indicator Display
(LED Flash 0.5s−ON/0.5s−OFF
Running
LED
Cooling
LED
Heating_
LED
D40
/D5
D41
/D6
D42/
D16
D43/
D30
Outdoor unit error U9
Cooling: compressor will
stop, and indoor fan runs.
Heating all stop
Replace outdoor
board AP1.
Indoor freeze protection FH
Operation normal,
compressor speed
reduced
Indoor unit return air
blocked or fan speed
is too low,
Fan module protection L3
Cooling: outdoor fan
motor and compressor
stop; and indoor fan runs.
Heating all stop
1. Outdoor fan
terminals loose,
correct problem.
2. Motor damaged,
replace motor.
3. Fan motor module
on mainboard is
damaged; replace
mainboard AP1.
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.
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