SERVICE MANUAL
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410A Ductless Split System: DLF4(A/H), DLC4(A/H)
421 08 9204 00
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Application for 18 & 24K model
Confirm the malfunction type according to the malfunction indicator of indoor/outdoor unit and malfunction sheet (usually the sheet will be
stuck on the electric box cover or top cover of the unit).
As long as there is a malfunction, the indicator of the outdoor controller board will display the corresponding malfunction directly; Some mal-
functions will be displayed on the indoor unit directly and some malfunctions will be seen on the remote controller by pressing light button
for 4 times in 3 seconds.
In the below malfunction diagnosis process, “Y” means “Yes”, “N” means “No”;
In the below malfunction diagnosis process, controller board AP1 is for outdoor controller board;
Before proceeding to the malfunction check, discharge the electrolytic capacitor according to the method mentioned before and
make sure the voltage is below 20V. Otherwise, it may cause electric shock or brake the controller board!
