Gree HLR35SM/NaA-M Service Manual page 38

Modular mini chiller
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MODULAR MINI CHILLER
2.
Low Pressure Protection(E3)
R e v e r s e o f c o o lin g
a n d h e a tin g
T h e fa n s to p s r u n n in g
o r r e v e r s e s d u r in g
h e a tin g o r th e w a te r
p u m p is n o t o p e n o r
w ith p o o r flo w v o lu m e
d u r in g c o o lin g
E x p a n s io n v a lv e is
n o t o p e n ( c a p illa r y
r u p tu r e s o r le a k s )
P r e s s u r e s w itc h is
b r o k e n ( s h a ll b e
n o r m a lly c lo s e d ) o r
th e w ir in g is lo o s e
F in e d h e a t
e x c h a n g e r is d ir ty o r
a g in g d u r in g h e a tin g
o r s h e ll tu b e
s e r io u s ly s c a le s
d u r in g c o o lin g
Im p r o p e r d e s ig n
o f w a te r w a y
p ip e lin e a n d lo w
flo w v o lu m e u p o n
s to p o f te r m in a l
M is d e c la r in g a la r m
o f c o n tr o lle r
C o n ta c t w ith s u p p lie r
L o w p r e s s u r e
p r o te c tio n
Y e s
N o
N o
N o
N o
N o
F ilte r b lo c k s
N o
N o
L e a k a g e o f
r e fr ig e r a n t
N o
N o
Y e s
A d ju s t o p e r a tio n m o d e
Y e s
C h e c k fa n o r
w a te r p u m p
Y e s
R e p la c e e x p a n s io n
v a lv e ( c a p illa r y )
Y e s
R e p la c e p r e s s u r e
s w itc h o r r e w ir e
Y e s
C le a n h e a t e x c h a n g e r
Y e s
R e p la c e filte r
Y e s
A d ju s t w a te r w a y p ip e lin e
A d d r e fr ig e r a n t a fte r
Y e s
le a k a g e d e te c tio n a n d
c o m p e n s a tio n
C h e c k if it h a p p e n s
Y e s
fr e q u e n tly . If n e c e s s a r y ,
r e p la c e m a in b o a r d
MAINTENANCE
38

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