Samsung AM072FXVAFH series, Service Manual

Page: 126 / 293

Trou b l e shootin g
4- 3 0 Sa msun g El ec troni c s
4-4-4 Communication Error between Indoor and Outdoor Units after Tracking
1. How to c h ec k
Pr e ss th e r e s e t k e y (K 3 ) o f th e out d oor unit PCB
a n d c h ec k th e d ispl a y mo d ul e .
Is th e volt age be tw ee n
th e 2 cab l e s a squ a r e w a v e with DC±0.7V or mor e
a s shown in th e im age be low?
Is th e r e no in d oor unit
r e spons e a t a ll f rom th e d ispl a y mo d ul e d urin g
th e tr ac kin g ?
R e mov e th e c ommuni ca tion cab l e th a t c onn ec ts
th e out d oor unit to th e in d oor nit, a n d m ea sur e
th e 2 out d oor unit cab l e s with a s c op e .
Conn ec t th e c ommuni ca tion cab l e aga in to
c onn ec t th e out d oor unit to th e in d oor unit.
R e mov e a ll th e c ommuni ca tion c onn ec tors on th e PCB o f
th e in d oor unit, a n d c onn ec t th e m on e b y on e to f in d
th e in d oor unit whi c h int e r fe r e s with th e c ommuni ca tion
to c h ec k a n d c h a n ge th e in d oor unit PCB.
A f t e r two minut e s, f in d th e in d oor unit whi c h d ispl a ys
th e c ommuni ca tion e rror a n d c h ec k i f th e PCB add r e ss
s e ttin g s a r e ov e rl a pp ed .
(Communi ca tion e rror o cc urs i f th e in d oor unit
add r e ss e s a r e ov e rl a pp ed .)
- In this ca s e , th e c ommuni ca tion e rror will o cc ur in e v e ry
in d oor unit ( 2 or mor e units) with th e add r e ss in c orr ec tly
s e t.
Ch ec k th e c ommuni ca tion cab l e a n d th e
c onn ec tor f or th e out d oor unit PCB,
a n d c h a n ge th e PCB.
0.7V
0.7V
Goo d
D efec tiv e
I f th e r e is no p ec uli a rity in th e add r e ss, c h ec k
th e c ommuni ca tion cab l e a n d c h a n ge th e in d oor unit PCB.
Y e s
No
No
Y e s
* Ess e nti a l R e quir e m e nts bef or e Ch a n g in g PCB in
C a s e o f Communi ca tion Error: R efe r to p.50
Out d oor unit d ispl a y
In d oorunit d ispl a y
Du c t, C a ss e tt e (1/ 2 W a y),Consol e , C e lin g C a ss e tt e (4/Mini4 W a y) W a ll-mount ed (N e oFort e )
Op e r a tion D ef rost Tim e r F a n Filt e r/MPI Op e r a tion D ef rost Tim e r Filt e r Op e r a tion Tim e r Tur b o 2 4
℃
2 7
℃
× × ◑ ◑
×
× ◑ ◑ × × × ◑ ◑ ×
※ ● :
ON
◑ :
Fl a sh
× :
OFF
Ju dg m e nt M e tho d ∙ Out d oor unit is un ab l e to c ommuni ca t e f or two minut e s d urin g op e r a tion. (no r ece ption o f r e lo ca tion)
C a us e o f pro b l e m ∙ Communi ca tion e rror be tw ee n in d oor a n d out d oor units a n d s e tup e rror o f in d oor unit inst a ll a tion qu a ntity s e tup swit c h.