Troubleshooting
Samsung Electronics
27
4-
3
-
5
Hig
h
p
ress
u
re
tem
p
erat
u
re
se
n
sor
error
(Op
e
n/S
hort
) (E
rror
Co
d
e
: E291)
L
o
w p
ress
u
re
tem
p
erat
u
re
se
n
sor
error
(Op
e
n/S
hort
) (E
rror
Co
d
e
: E296)
Midd
le
p
ress
u
re
tem
p
erat
u
re
se
n
sor
error
(Op
e
n/S
hort
) (E
rror
Co
d
e
: E2
8
6)
1. High/Middle/low pressure sensor OPEN/SHORT error determination method.
1) Identifies from when power is supplied or 2 minutes after RESET, and only when set is stopped.
2) An OPEN/SHORT error will occur if the input voltage standard exceeds 0.5V ~ 4.95V range.
2. How to check
Replace high/middle/low-pressure sensor
Please re-inspect after connecting
the connector to the PCB.
No
Yes
Did the high/middle/low pressure
connector get disconnected from the PCB?
Refill refrigerant after vacuum.
No
Yes
Is there refrigerant inside the set?
(Please check by connecting the manifold gauge to
the service valve)
Replace PCB.
No
Yes
On the
high/middle/low-pressure
sensor terminals of the PCB, is the value of voltage 5V,
between pins 3 and 4? Is the value of
voltage 5V, between pins 2 and 4?
T
he
▼
m
ark
i
s
the
1s
t
p
i
n
o
n
the
P
CB
.