Daikin FTKS50BVMB, Service Manual

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Troubleshooting for Outdoor Unit SiEN18-622
372 Troubleshooting
7.11 Malfunction of Thermistor (R3T, R5T) for Suction
Pipe1, 2
Remote Control
Display
J5
Applicable
Models
AII outdoor unit models
Method of
Malfunction
Detection Malfunction is detected from the temperature detected by the thermistor for suction pipe 1, 2.
Malfunction
Decision
Conditions When a short circuit or an open circuit in the thermistor for suction pipe 1, 2 are detected.
Supposed
Causes „ Defect of thermistor (R3T, R5T) for outdoor unit suction pipe
„ Defect of outdoor unit PCB (A1P)
Troubleshooting
∗
Refer to thermistor resistance / temperature characteristics table on P407.
(V 3 07 3 )
Caution
NO
NO
YE S
YE S
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.
Connect the thermi s tor a nd
t u rn on a g a in.
Repl a ce the thermi s tor
(R 3 T, R5T).
Repl a ce o u tdoor u nit PC b o a rd
(A1P).
Connector
of the thermi s tor for
su ction pipe1, 2 i s
connected to 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
(R 3 T, R5T) from
the o u tdoor u nit PC
b o a rd. ( 3 .5k
Ω
~
3 60K
Ω
)