T M 9 - 6 1 5 0 - 2 2 6 - 13
T a b l e 4 - 3.
UNIT TROUBLESHOOTING (cont)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
3 .
USER’S 3-PHASE (208 V) EQUIPMENT WILL NOT OPERATE AND ALL PHASE INDICATOR
LIGHTS ARE ON. (cont)
S t e p 4.
D i s c o n n e c t o u t p u t c a b l e a t n e a r e s t c e n t e r , u s e m u l t i m e t e r a n d
c h e c k f o r c o r r e c t o u t p u t v o l t a g e .
( a ) I f c o r r e c t v o l t a g e i s p r e s e n t , r e p l a c e c a b l e .
( b ) I f c o r r e c t v o l t a g e i s n o t p r e s e n t , g o t o M a l f u n c t i o n 1 ,
s t e p 3 , a n d c o n t i n u e t r o u b l e s h o o t i n g .
4. USER’S 3-PHASE (208 V) EQUIPMENT WILL NOT OPERATE AND PHASE INDICATOR
LIGHTS ARE OFF.
P e r f o r m t r o u b l e s h o o t i n g s t e p s i n m a l f u n c t i o n 2 .
5 .
CIRCUIT BREAKER SUPPORTING USER’S LOAD REPEATEDLY TRIPS.
CAUTION
D o n o t b l o c k c i r c u i t b r e a k e r s i n O N p o s i t i o n .
E x c e s s i ve
c u r r e n t w i l l d a m a g e D I S E a n d P D I S E e q u i p m e n t.
C h e c k t h a t u s e r ’ s l o a d r e q u i r e m e n t s d o n o t e x c e e d c e n t e r c o n n e c t o r o u t p ut
r a t i n g .
( a ) I f u s e r ’ s l o a d r e q u i r e m e n t s e x c e e d c i r c u i t b r e a k e r r a t i n g ,
n o t i f y o p e r a t o r t h a t l o a d e x c e e d s c i r c u i t b r e a k e r r a t i n g .
( b ) I f t h e u s e r ’ s t o t a l l o a d r e q u i r e m e n t s a r e l e s s t h a n c i r c u i t
b r e a k e r r a t i n g a n d c i r c u i t b r e a k e r s t i l l t r i p s , r e p l a c e
c i r c u i t b r e a k e r ( r e f e r t o p a r a 4 - 1 4 ) .
4 - 1 2
