Daikin FTKS20CVMB, Service Manual

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SiENBE04-401A Troubleshooting
Service Diagnosis 113
4.4 Fan Motor (AC Motor) or Related Abnormality
Remote control
Display
A6
Method of
Malfunction
Detection
The rotation speed detected by the Hall IC during fan motor operation is used to determine
abnormal fan motor operation.
Malfunction
Decision
Conditions
When the detected rotation speed is less than 50% of the HH tap under maximum fan motor
rotation demand.
Supposed
Causes
„ Operation halt due to short circuit inside the fan motor winding.
„ Operation halt due to breaking of wire inside the fan motor.
„ Operation halt due to breaking of the fan motor lead wires.
„ Operation halt due to faulty capacitor of the fan motor.
„ Detection error due to faulty indoor unit PCB.
Troubleshooting
Check No.16
Refer to P.145
Rot a te the f a n b y h a nd.
Check No. 16
Check H a ll IC
Oper a te the f a n.
Doe s it rot a te?
NO
Doe s it rot a te s moothly?
I s there a n o u tp u t?
I s it a t the r a ted volt a ge?
I s there cond u ctivity?
NO
Check the c a p a citor' s cond u ctivity
Check the f a n motor volt a ge.
(immedi a tely a fter re- s t a rt)
I s it a t the r a ted volt a ge?
Check the f a n motor volt a ge.
NO
NO
NO
NO
YE S
YE S
YE S
YE S
YE S
YE S
Repl a ce the f a n motor or indoor u nit
PCB.
Repl a ce the f a n motor
∗
2 Me asu re the volt a ge b etween the
red a nd b l a ck le a d wire s of the f a n
motor, a nd check if the m a xim u m
volt a ge re a che s the r a ted volt a ge.
Repl a ce indoor u nit PCB (1).
Repl a ce the f a n motor.
Repl a ce the indoor u nit PCB (1)
Repl a ce the c a p a citor.
(Repl a ce PCB (1).)
Repl a ce the f a n motor.
(R4096)
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.