Samsung AM080FXWANR, Service Manual

Page: 290 / 295

T e st Op e r a tion
Sa m s u n g El ec troni c s 2 89
8) 4-way valve
∙ W h a t to insp ec t : O u t d oor u nit ' s 4-w a y v a lv e op e r a tion
∙ E rror c o de : N on e (“ N G” is on ly in d i ca t ed in th e r e s u l t r e port )
∙ H o w to de t e r m in e e rror : Ch ec k th e v a ri a tions o f pr e ss u r e w h e n th e 4-w a y v a lv e is op e r a tin g.
∙ P e r f or m insp ec tion acc or d in g to th e st e ps sho w n be l o w .
Ŷ
P r ecau tions
- T o r e p l ace a c o m pon e nt or insp ec t th e P BA , be s u r e to cu t o ff th e po w e r s u pp ly f irst .
If insp ec tion m u st be p e r f or m ed w ith th e po w e r s u pp ly on , e x e r c is e e x tr a ca r e to pr e v e nt e l ec tri c sho c k .
Do e s th e r e s u l t
o f A u to T ri a l Op e r a tion sho w th a t th e
pr e ss u r e s e nsors a r e prop e r ly
fu n c tionin g ?
I s th e 4-w a y
v a lv e c onn ec tor prop e r ly c onn ec t ed to
th e P BA ?
I s th e pin - to - pin
v o l t age o f th e 4-w a y v a lv e t e r m in a l on
th e H ub P BA 220V ?*
I s th e c oi l
o f th e 4-w a y v a lv e prop e r ly
fu n c tionin g ?
P e r f or m T ri a l Op e r a tion ( c oo l in g / h ea tin g )
- See th e instr uc tions on K e y op e r a tion m o de s .
I s a s ym pto m
cau s ed b y m a l fu n c tion o f
th e 4-w a y v a lv e
pr e s e nt ?
I s th e op e r a tion c y c l e nor m a l?
P e r f or m A u to T ri a l Op e r a tion aga in .
R e p l ace th e b o d y o f th e
4-w a y v a lv e *
* P e r f or m insp ec tion a t l ea st t w i ce bef or e
r e p l ac in g th e 4-w a y v a lv e.
T a k e c orr ec ti v e m ea s u r e s .
T a k e c orr ec ti v e m ea s u r e s .
T a k e c orr ec ti v e m ea s u r e s .
R e p l ace th e H ub P BA .
∙ A f t e r c o m p l e tin g tri a l op e r a tion in h ea tin g m o de , m ea s u r e th e pin - to - pin
v o l t age on th e 4-w a y v a lv e t e r m in a l ( th e r e is no o u tp u t in th e t e r m in a l
af t e r tri a l op e r a tion in c oo l in g m o de is t u rn ed o ff ) .
R e p l ace th e c oi l .
Y e s
Y e s
Y e s
Y e s
Y e s
N o
N o
N o
N o
N o
N o
Y e s
9-1 Auto Trial Operation ( c ont . )
9-1-3 How to resolve NG items ( c ont . )