Samsung AM080FXWANR, Service Manual

Page: 241 / 295

Sa m s u n g El ec troni c s 2 4 0
P ipin g Di ag r a m
Auto Change Over
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Purpose
A u to m a ti ca lly t u rn on h ea tin g or c oo l in g m o de acc or d in g to th e in d oor t e m p e r a t u r e w h e n u sin g au to m o de on HR m o de l
u nits .
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Concept
- H o w to t u rn on th e m o de : Se l ec t A u to Ch a n ge o v e r
- H ea tin g or c oo l in g m o de au to m a ti ca lly t u rns on af t e r c o m p a rin g th e in d oor t e m p e r a t u r e (T r ) w ith th e s e t t e m p e r a t u r e
(T s ) . I t is possi b l e to ad j u st th e A u to Ch a n ge o v e r c on d ition acc or d in g to th e v a l ue o f inst a ll a tion option 2.
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Control specifications in detail
1 . I niti a l op e r a tion m o de de t e r m in a tion
If T r ≥ T s - A + 1 K If T r < T s – A + 1 K
A u to Coo l in g A u to H ea tin g
2. Mo de c h a n ge
Coo l in g
ױ
H ea tin g H ea tin g
ױ
Coo l in g
T h e r m o o ff f or T & T r < T s - D T h e r m o o ff f or T & T r ≥ T s + C
3. T h e r m o On / O ff
I n c oo l in g m o de I n h ea tin g m o de
T h e r m o on : T r ≥ T s + B + 1 K
T h e r m o o ff : T r < T s + B – 1 K
T h e r m o on : T r < T s - A – 1 K
T h e r m o o ff : T r ≥ T s - A + 1 K
- I nst a ll Option 2 v a l ue
S ym b o l Fu n c tion 0 1 2 3 4 5 6 7
A O ff s e t th e s e t h ea tin g t e m p 0 0. 5 1 1 . 5 2 2. 5 3 3. 5
B O ff s e t th e s e t c oo l in g t e m p 0 0. 5 1 1 . 5 2 2. 5 3 3. 5
C Ch a n ge th e m o de ( h ea t
ױ
c oo l) 1 1 . 5 2 2. 5 3 3. 5 4 4 . 5
D Ch a n ge th e m o de ( c oo l
ױ
h ea t ) 1 1 . 5 2 2. 5 3 3. 5 4 4 . 5
T T ti m e 5 7 9 11 1 3 1 5 20 30
7-3 Functions ( c ont . )
7-3-2-6 Indoor unit control ( c ont . )
7-3-2 Control ( c ont . )