Daikin FTXS50K2V1B - Outdoor Unit PCB Fault Diagnosis; LED Indicators for 3 MXS;4 MXS;5 MXS Series; LED Indicators for 2 MXS Series

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Troubleshooting
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LED ON OUTDOOR UNIT PCB
3MXS, 4MXS, 5MXS series
GREEN RED
MICROCOMPUTER
NORMAL
MALFUNCTION
DETECTION
LED-A LED1 LED2 LED3 LED4 LED5 DIAGNOSIS
●●●●●
NORMAL CHECKINDOORUNIT
● ●
HIGHPRESSUREPROTECTORWORKEDORFREEZE-UPIN
OPERATINGUNITORSTAND-BYUNIT
●
●
●
*OVERLOADRELAYWORKEDORHIGHDISCHARGEPIPE
TEMPERATURE
●
●
●
FAULTYCOMPRESSORSTART
● ● ●
INPUTOVERCURRENT
●●●
*THERMISTORORCTABNORMALITY
● ●
HIGHTEMPERATURESWITCHBOX
●●● ●
HIGHTEMPERATUREAT INVERTERCIRCUITHEATSINK
●● ●●
*OUTPUTOVERCURRENT
●● ●
*REFRIGERANTSHORTAGE
●● ●
LOWVOLTAGETOMAINCIRCUITORMOMENTARYVOLTAGE
LOSS
●●●●
REVERSINGSOLENOIDVALVESWITCHINGFAILURE
●
FANMOTORFAU LT
−−−−
●
[NOTE1]
●
−−−−
●
POWERSUPPLYFAU LTOR[NOTE2]
NOTE:TheLED5isonlyavailableinthe5Mseries.
GREEN NORMALLYFLASHING
RED NORMALLYOFF
ON
FLASHING
●
OFF
−
IRRELEVANT
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LED ON OUTDOOR UNIT PCB
2MXS series
GREEN
MICROCOMPUTERNORMAL
LED-A DIAGNOSIS
NORMAL CHECKINDOORUNIT
[NOTE1]
●
POWERSUPPLYFAU LTOR[NOTE2]
GREEN NORMALLYFLASHING
ON
FLASHING
●
OFF
NOTE
• Tur n thepoweroffandthenonagain.IftheLEDdisplayrecurs,theoutdoorunitPCBisfaulty.
• Diagnosismarked
*Donotapplytosomecases.Fordetails,refertotheserviceguide.
01_EN_3P320970-1A.indd 41 12/20/2012 11:22:49 AM