Auto Commissioning & Management System & Amount of Refrigerant Check Function
2) P
ress
u
re
S
e
n
sor
Ŷ
T
hings
to
Check:
H
igh/
l
ow
press
u
re
sensors
of
stand
-
a
l
one
o
u
tdoor
u
nit
Ŷ
E
rror
Code:
None
(
showing
"
Check
Req
u
ired
"
on
the
res
ul
t
report)
Ŷ
Determine
the
press
u
re
sensor
stat
u
s
of
stand
-
a
l
one
o
u
tdoor
u
nit
before
r
u
nning
the
compressor.
Ŷ
When
ha
v
ing
a
"
Check
Req
u
ired
"
message
from
the
press
u
re
sensor
of
o
u
tdoor
u
nit
,
p
l
ease
check
in
the
fo
ll
owing
order.
[N
ote
]
-
When
there
is
a
history
of
o
u
tdoor
u
nit
operation
(
inc
lu
ding
A
u
to
Commissioning
&
M
anagement
System
operation)
,
p
l
ease
try
to
maintain
the
v
ac
uu
m
mode
for
fi
v
e
min
u
tes
or
more.
No
Check for problematic pressure sensor
Outdoor Unit Vacuum
M
ode
Are
the pressure sensor connectors
connected properly
?
Is the high,
intermediate and low pressure sensor
deviation of outdoor unit
below 2
?
Is the voltage of 5v
read between the pins 3 and 4
(pins 2 and 4 in case of intermediate
pressure level) from the PC
B
pressure sensor
terminal
?
Outdoor Unit Vacuum
M
ode
Finish
Replace main PC
B
Replace pressure sensor
No
No
Yes
Yes
Yes
Check and Take Action
* Check for problematic pressure sensor upon
checking pressure by connecting the saturated pressure of
outdoor temperature or manifold gauge.
