Daikin FTKS50BVMB, Service Manual

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Troubleshooting for Outdoor Unit SiEN18-622
370 Troubleshooting
7.9 Malfunction of Thermistor for Outdoor Air (R1T)
Remote Control
Display
H9
Applicable
Models
AII outdoor unit models
Method of
Malfunction
Detection Malfunction is detected from the temperature detected by the outdoor air thermistor.
Malfunction
Decision
Conditions When the outside air temperature thermistor has short circuit or open circuit.
Supposed
Causes „ Defect of thermistor (R1T) for outdoor air
„ Defect of outdoor unit PCB (A1P)
Troubleshooting
∗
Refer to “Thermistor Resistance / Temperature Characteristics” table on P407.
(V 3 070)
Caution
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.
NO
NO
YE S
YE S
Connector i s
connected to X11A
ofo u tdoor PC b o a rd
(A1P).
Connect the connector a nd t u rn
on a g a in.
Repl a ce the thermi s tor (R1T).
Repl a ce o u tdoor u nit PC b o a rd
(A1P).
Re s i s t a nce
i s norm a l when
me asu red a fter
di s connecting the
thermi s tor (R1T) from
the o u tdoor u nit PC
b o a rd. ( 3 .5k
Ω
to 3 60k
Ω
)