Daikin FTKS50BVMB, Service Manual

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Troubleshooting for Outdoor Unit SiEN18-622
394 Troubleshooting
7.30 Malfunction of Transmission between Remote Control
and Indoor Unit
Remote Control
Display
U5
Applicable
Models
AII indoor unit models
Method of
Malfunction
Detection
In case of controlling with 2-remote control, check the system using microcomputer is signal
transmission between indoor unit and remote control (main and sub) is normal.
Malfunction
Decision
Conditions
Normal transmission does not continue for specified period.
Supposed
Causes „
Malfunction of indoor unit remote control transmission
„ Connection of two main remote controls (when using 2 remote controls)
„
Defect of indoor unit PCB
„
Defect of remote control PCB
„ Malfunction of transmission caused by noise
Troubleshooting
Caution
(V2 8 2 3 )
NO
YE S
YE S
NO
NO NO
YE S
YE S YE S
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.
U s ing 2-remote
control s control.
All indoor
PC b o a rd microcomp u ter
monitor s b link.
M u lti-core
c ab le i s us ed for the
indoor u nit remote
control tr a n s mi ss ion
wiring.
SS 1 of
b oth remote control s
i s s et to "MAIN."
Oper a tion
ret u rn s to norm a l when
the power i s t u rned off
moment a rily.
S et one remote control to
" S UB"; t u rn the power su pply
off once a nd then ba ck on.
Repl a ce indoor u nit
PC b o a rd.
There i s po ss i b ility of
m a lf u nction c aus ed b y noi s e.
Check the su rro u nding a re a
a nd t u rn on a g a in.
S witch to do ub le-core
independent c ab le.
repl a cement
Defect of remote control PC
b o a rd or indoor u nit PC
b o a rd. Repl a ce whichever i s
defective.