Thermo King Super II SR+, Руководство пользователя

Страница: 136 / 145

Refrigeration Diagnosis (Rev 6/98)
126
• •
Expansion valve open too much
• •
Expansion valve closed too much
• •
Expansion valve needle eroded or leaking
• • •
Expansion valve partially closed by ice, dirt or wax
• • •
Liquid refrigerant entering compressor
• •
Restricted line on the low side
• • • •
Restricted line on the high side
• • • •
Restricted drier
•
Evaporator shutter open
• • •
Evaporator stuck closed
•
Discharge service valve back seated
•
Suction service valve back seated
• • • • • • •
Faulty three-way valve
• • • • •
Faulty pilot solenoid
• •
Loose or broken electrical connections
• • • • •
Thermostat or thermometer out of calibration
• • • • • • •
Suction pressure gauge out of calibration
•
Leaky receiver tank outlet valve
•
Leaky bypass check valve*
• • • • •
Leaky condenser check valve
•
Faulty three-way condenser pressure bypass check
valve
• • • • •
Modulation valve stuck closed
• • • • •
Hot gas bypass valve stuck open or leaking
Rapi
d c
y
c
lin
g
be
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ool
an
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at
Uni
t c
ool
s
in h
eat
and
def
ro
st
cy
cl
e
U
n
it
he
at
s
in
re
fr
ige
ra
tio
n c
y
c
le
Hig
h
he
ad p
ress
u
re
Low hea
d
pr
es
s
u
re
No h
ead
pr
es
su
re
H
igh
su
ct
io
n
p
re
ssu
re
Low su
cti
on pr
es
su
re
N
o
su
ct
io
n
pr
es
su
re
Uni
t op
er
ati
ng i
n
a
va
cu
um
Rec
e
iv
e
r s
ight
gla
s
s
em
pty
Su
cti
on li
ne
fr
o
s
ti
ng bac
k
Unab
le
to p
u
mp
dow
n s
y
s
tem
U
nab
le
to p
u
ll v
a
c
uum
in
lo
w
s
ide
U
nab
le
to h
o
ld
v
a
c
uum
in
low
si
de
N
o
is
y co
m
p
re
s
s
o
r
Uni
t no
t r
e
fr
ig
er
ati
n
g
Uni
t no
t hea
tin
g
o
r d
e
fr
os
ti
ng
SY
MP
TOM
POSSIBLE CAUSES