Mitsubishi Electric PU-P71VHA 2.UK Series Service Manual page 64

11-10. FUNCTION OF SWITCHES, CONNECTORS AND J UMPERS
Function of switch es
Switch
Function
Signal No.
SW1 1
C o m p u l s o r y d e f r o s t i n g *
2
A b n o r m a l h i s t o r y c l e a r
3
R e f r i g e r a n t a d d r e s s s e t t i n g
6
SW4 1
Te s t r u n O N / O F F
2
Te s t r u n m o d e s e t t i n g
SW5 1
F a n 100%
2
O u t d o o r L E V o p e n i n g f i x * *
3
N o f u n c t i o n
4
L e n g t h o f d e f r o s t o p e r a t i o n
* Compulsory defrosting should be done as follows.
1 hange the - in the o t oor controller oar
According to the 1 operation,
eat mo e setting
• When the stated condition is satisfied, the defrosting operation will be completed.
* * Ignore the change of LEV opening, which is subject to change of subcooling, and fix DIP SW 5-2 in the on position. Then
LEV opening is fix e d. When air conditioner is overloaded for some reasons, ignore the change of subcooling and adjust the
LEV opening in accordance with overload condition.
OC37 9 J
Action by th e switch operation
ON
S t a r t
C l e a r
O N O N
1 2 3 4 5 6 1 2 3 4 5 6
0
O N O N
1 2 3 4 5 6 1 2 3 4 5 6
4
O N O N
1 2 3 4 5 6 1 2 3 4 5 6
8
O N O N
1 2 3 4 5 6 1 2 3 4 5 6
12
O N
He a t
f i x 100% f i x
F i x
N o f u n c t i o n
20 m i n u t e s
om ressor o erating The efrosting starts hen the i ing tem erat re is
OFF
N o r m a l
N o r m a l
O N O N
1 2 3 4 5 6 1 2 3 4 5 6
1 2
O N O N
1 2 3 4 5 6 1 2 3 4 5 6
5 6
O N O N
1 2 3 4 5 6 1 2 3 4 5 6
9 10
O N O N
1 2 3 4 5 6 1 2 3 4 5 6
13 14
O F F
C o o l
N o r m a l
N o r m a l
N o f u n c t i o n
15 m i n u t e s (N o r m a l )
→ N com lsor efrosting start .
64
Effectiv e timing
He a t c o m p r e s s o r o p e r a t i n g
o f f o r o p e r a t i n g
3
W h e n p o w e r s u p p l y O N
7
11
15
O F F
o f f o r o p e r a t i n g
o f f o r o p e r a t i n g
–
A l w a y s
an elo .