Mitsubishi Electric PU-P71VHA 2.UK Series Service Manual page 37

"TEST RUN" and the currently selected
operation mode are displayed altemately.
Displays the remaining
test run time.
B
C
A
Pipe (liq uid) temperature
• In case of test run, the OFF timer will be activated, and the test run will automatically stop after two hours.
• The room temperature display section shows the pipe temperature of indoor units during the test run.
• Check that all the indoor units are running properly in case of simultaneous twin and triple operation. Malfunctions may not
be displayed regardless of incorrect wiring.
* 1 After turning on the power supply, the system will go into startup mode, "PLEASE WAIT" will blink on the display section of
the room temperature, and lamp(green) of the remote controller will flash.
As to INDOOR B OARD LED, LED1 will be lit up, LED2 will either be lit up in case the address is 0 or turned off in case the
address is not 0. LED3 will blink.
As to OUTDOOR B OARD LED, LED1(green) and LED2(red) will light up. (After the startup mode of the system finishes,
LED2(red) will be turned off.)
In case OUTDOOR B OARD LED is digital display,
• If one of the above operations does not function correctly, the causes written below should be considered. Find causes from
the symptoms.
The below symptoms are under test run mode. "startup" in the table means the display status of * 1 written above.
Symptoms in test run mode
Remote Controller Display
R e m o t e c o n t r o l l e r d i s p l a y s " P L E A S E
W A I T" , a n d c a n n o t b e o p e r a t e d .
A f t e r p o w e r i s t u r n e d o n , " P L E A S E W A I T"
i s d i s p l a y e d f o r 3 m i n u t e s , t h e n c h e c k c o d e
i s d i s p l a y e d .
N o d i s p l a y a p p e a r s e v e n w h e n r e m o t e
c o n t r o l l e r o p e r a t i o n s w i t c h i s t u r n e d o n .
(O p e r a t i o n l a m p d o e s n o t l i g h t u p . )
D i s p l a y a p p e a r s b u t s o o n d i s a p p e a r s
e v e n w h e n r e m o t e c o n t r o l l e r i s o p e r a t e d .
Press the remote controller' s CHECK button twice to perform self-diagnosis. See the table below for the contents of LCD display.
Contents of inferior ph enomena
LCD
A b n o r m a l i t y o f r o o m t e m p e r a t u r e t h e r m i s t o r
P 1
A b n o r m a l i t y o f p i p e t e m p e r a t u r e t h e r m i s t o r / L i q u i d
P 2
A b n o r m a l i t y o f d r a i n s e n s o r / F l o a t s w i t c h c o n n e c t o r o p e n
P 4
P 5 D r a i n o v e r f l o w p r o t e c t i o n i s w o r k i n g .
F r e e z i n g / o v e r h e a t i n g p r o t e c t i o n i s w o r k i n g .
P 6
A b n o r m a l i t y o f p i p e t e m p e r a t u r e
P 8
A b n o r m a l i t y o f p i p e t e m p e r a t u r e t h e r m i s t o r / C o n d . / E v a
P 9
A b n o r m a l i t y o f i n d o o r c o n t r o l l e r b o a r d
F b
See the table below for details of the LED display (LED 1, 2, 3) on the indoor controller board.
L E D 1 (m i c r o p r o c e s s o r p o w e r s u
L E D 2 (r e m o t e c o n t r o l l e r )
L E D 3 (i n d o o r / o u t d o o r c o m m u n i c a
OC37 9 J
Operating procedures
1. Tu r n o n t h e m a i n p o w e r s u p p l y .
2. P r e s s
3. P r e s s
b u t t o n .
4. P r e s s
5. C h e c k t h e o u t d o o r u n i t f a n f o r
c o r r e c t r u n n i n g .
[TEST] button
6. P r e s s t h e
7. R e g i s t e r t h e c o n t a c t n u m b e r .
OUTDOOR BOARD LED Display
A f t e r " s t a r t u p " i s d i s p l a y e d , o n l y
A f t e r " s t a r t u p " i s d i s p l a y e d ,
g r e e n (o n c e ) a n d r e d (o n c e ) b l i n k
A f t e r " s t a r t u p " i s d i s p l a y e d ,
g r e e n (o n c e ) a n d r e d (t w i c e ) b l i n k
A f t e r " s t a r t u p " i s d i s p l a y e d ,
g r e e n (t w i c e ) a n d r e d (o n c e ) b l i n k
A f t e r " s t a r t u p " i s d i s p l a y e d , o n l y
A f t e r " s t a r t u p " i s d i s p l a y e d , o n l y
p p l y ) L i g h t s w h e n p o w e r i s s u
L i g h t s w h e n p o w e r i s s u
Th e i n d o o r u n i t s h
t i o n ) F l a s h w h e n i n d o o r a n d o u t d o o r u n i t a r e c o
A TE S T b u t t o n t w i c e .
B
O P E R A TI O N S W I TC H
C
A I R D I R E C TI O N b u t t o n .
O N / O F F b u t t o n t o r e s e t t h e t e s t r u n i n p r o g r e s s .
— and — will be displayed alternately every second.
m i n u t e s d u r i n g s y s t e m
LCD
M a l f u n c t i o n o u t d o o r u n i t
U 1~ U P
M a l f u n c t i o n o u t d o o r u n i t
F 3~ F 9
E 0~ E 5 R e m o t e c o n t r o l l e r t r a n s m i t t i n g e r r o r
I n d o o r / o u t d o o r u n i t c o m m u n i c a t i o n e r r o r
E 6~ E F
N o c h e c k c o d e h i s t o r y
- - - -
N o a p p l i e d u n i t
F F F F
F o r c e d c o m p r e s s o r s t o p (d u e t o w a t e r l e a k a g e a b n o r m a l i t y )
P A
p p l i e d .
p p l i e d f o r w i r e d r e m o t e c o
o u l d b e c o n n e c t e d t o t h e o u t d o o r u n i t w i t h a d d r e s s
m m u n i c a
37
W h i l e t h e r o o m t e m p e r a t u r e d i s p l a y o n t h e r e m o t e
c o n t r o l l e r i s " P L E A S E W A I T" , t h e r e m o t e c o n t r o l l e r i s d i s a b l e d .
W a i t u n t i l " P L E A S E W A I T" d i s a p p e a r s b e f o r e u s i n g r e m o t e c o n t r o l l e r .
" P L E A S E W A I T" a p p e a r s f o r a b o u t 2 m i n u t e s a f t e r p o w e r
s u p p l y i s t u r n e d o n . * 1
Th e TE S T R U N a p p e a r s o n t h e s c r e e n .
C o o l i n g m o d e : C h e c k i f c o o l a i r b l o w s a n d w a t e r i s d r a i n e d .
He a t i n g m o d e : C h e c k i f w a r m a i r b l o w s . (I t t a k e s a l i t t l e
w h i l e u n t i l w a r m a i r b l o w s . )
C h e c k f o r c o r r e c t m o t i o n o f a u t o - v a n e s .
Th e o u t d o o r u n i t f e a t u r e s a u t o m a t i c c a p a c i t y c o n t r o l t o
p r o v i d e o p t i m u m f a n s p e e d s . Th e r e f o r e , t h e f a n k e e p s
r u n n i n g a t a l o w s p e e d t o m e e t t h e c u r r e n t o u t s i d e a i r
c o n d i t i o n u n l e s s i t e x c e e d s i t s a v a i l a b l e m a x i m u m
Th e n , i n a c t u a l i t y , t h e f a n m a y s t o p o r r u n i n t h e r e v e r s e
d i r e c t i o n d e p e n d i n g o n t h e o u t s i d e a i r , b u t t h i s d o e s n o t
m e a n m a l f u n c t i o n .
Cause
s t a r t u p . (N o r m a l )
Contents of inferior ph enomena
n t r o l l e r .
" 0" s e t t i n g .
t i n g .
p o w e r .
, L , L a n d
1 3