Specifications

1068
FDC-HKXR
20.6. MAINTENANCE DATA
20.6.1 Diagnosis of Microcomputer circuit
(1) Confirmation of the error code on the remote controller (by pressing the inspection switch) and the inspection
display and normal display lamps on PCBs of indoor/ outdoor units
The microcomputer detects errors on electrical components, whitch include the microcomputer itself, errors on the power supply line
and errors (overload, etc.) on the refrigerant circuit and the location of trouble is displayed (with the combination of error symbols of
remote controller, normal (green) and inspection (red) display LED on PCBs of indoor/outdoor units.) When any error occurs, check
first the inspection display. It will guide you to the trouble point and assist you to complete the repair work quikly.
Error code of the remote controller is recorded on the microcomputer after the trouble has been reset automatically so that, if you
press the inspection switch of remote controller, the error code and the number of unit in trouble are displayed for 10 sec., The
inspection display lamp on the indoor/outdoor unit PCB keeps flashing (glowing) even after the trouble was reset automatically.
Inspection lamp on the indoor unit PCB is turned off if the remote controller is reset.
1) Inspection / normal: List of power display
Remote controller
Indoor/outdoor unit
Inverters
Display section
Power supply display
Error code
Inspection display
Normal display
Error display
Normaly display
Error display
Display
LCD
LCD
Red-LED
Green-LED
Red-LED
Green-LD1
Red-LD2
Red-LD3
Red-LD4
Contents of display
At power ON: Displays always the return air temperature and Center/ Remote.
At error: Displays E1 ~ E46 or blank depending on the kings of error.
At error: Flash continuously (indicates the occurrence of error).
At power ON (normal): Flash continuously.
At error: Off or continuous glowing or irregular illumination.
At error: Flash 1 ~ 3 times/ 5 sec for indoor unit depending on the kinds of error,
continuous flash, irregular illumination or off.
At error: Flash 1 ~ 9 times/ 10 sec for outdoor unit. depending on the kinds of
error, continuous flash, irregular illumination or off.
At power ON (normal): Flash continuously
At error: off or continuous glowing or irregular illumination.
At error: Lights when the power transistor overheats (for 3 minutes or more).
At error: Lights upon occurrence of a current-cut (held for 3 minutes).
At error: Lights when a transmisson error occurs between outdoor unit inverters.
Section