Daikin FTKS50BVMB, Service Manual

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SiEN18-622 Troubleshooting for Outdoor Unit
Troubleshooting 379
7.18 Malfunction of Inverter Radiating Fin Temperature Rise
Remote Control
Display
L4
Applicable
Models AII outdoor unit models
Method of
Malfunction
Detection Fin temperature is detected by the thermistor of the radiation fin.
Malfunction
Decision
Conditions When the temperature of the inverter radiation fin increases above 83°C.
Supposed
Causes „ Actuation of fin thermal (Actuates above 83°C)
„
Defect of inverter PCB
„ Defect of fin thermistor
Troubleshooting
Caution
NO
YE S
YE S
YE S
YE S
NO
NO
NO
Be su re to t u rn off power s witch b efore connect or di s connect connector,
or p a rt s d a m a ge m a y b e occ u rred.
The r a di a tor fin
temper a t u re i s su ppo s ed
to h a ve ri s en to 83
°
C
or more.
I s the
connector X111A of the
fin thermi s tor properly
connected to the o u tdoor
PCB?
T u rn ON the power su pply,
a nd then pre ss the remote
control check bu tton once.
I s the
m a lf u nction code
"P4"di s pl a yed on the
remote control?
Doe s the
m a lf u nction code
"L4" rec u r when the
u nit s t a rt s
oper a tion?
F au lty he a t r a di a tion of power u nit
• Air su ction opening b locked
• Dirty r a di a tor fin
• High o u tdoor temper a t u re
Properly connect.
To "P4" tro ub le s hooting
Repl a ce the o u tdoor PCB
(A1P) as well.
Contin u e oper a tion.