88
MAINTENANCE
Fault
Probable cause
Action required
14. Abnorma
l
Noise
in
Compresser*
Bo
lt
s
loo
se
T
ight
en
bolts
F
luid in
suct
ion lin
e
Check and
re
-se
t thermostatic
expans
ion
valves.
Check
that the
liquid
so
l
eno
id
valves do not remain open wh
en
machine
stops
Bu
lb i
s
l
oose or
in
correct
ly
positioned
Check bulb position
E
mulsion
in
oil
crankcase
Incorrect
lubri
cat
i
on. See
paragraphs
13
and 10
15. T
h
e CompressorMotor
does
not
start
Lo
w pressure
sw
it
ch cuts out
See
paragraph
3
High
pressure sw
it
ch cuts out
See
paragraph
6
F
uses burnt
out
Check
the
cause and change
fuses
Ant
i
-s
hort
cycle
time delay relay
i
s
in
operat
ion
Wait
Int
erna
i
secur
ity
sw
it
ched out
Check
cause of
in
crease
in
motor winding
temperatures
Main
c
ir
cu
it
-breaker sw
it
ch open
C
lo
se c
ir
cu
it
-
breaker
16. The Compressorworks
cont
inuou
s
ly
Contro
l
system
or
ether automat
i
c
deviee fault
Seeparegrep
h
s12and13
In
sta
ll
at
i
on
in
suff
i
c
i
ent
ly
charged
Charge
in
sta
ll
at
ion with
refrigerant
E
v
aporators
blocked or
i
ce present
Clean
and
defrost
evaporators
1
