SiUS28-902_B
Troubleshooting by Indication on the Remote Controller
Service Diagnosis
107
Troubleshooting
N
O
YES
YES
YES
N
O
N
O
YES
N
O
YES
N
O
+5
V
(4)
(3)
(2)
(1)
Check for the points sho
w
n
b
elo
w
.
(1) Is the stop
v
al
v
e open?
(2) Is the high press
u
re s
w
itch connector properly
connected to the main PCB?
(3) Does the high press
u
re s
w
itch ha
v
e contin
u
ity?
Are the
3 points a
b
o
v
e
OK?
Rectify defecti
v
e points, if any.
· Mo
u
nt a press
u
re ga
u
ge on the high press
u
re ser
v
ice port.
· Connect the Ser
v
ice Checker.
· Reset the operation
u
sing the remote controller,
and then restart the operation.
Does the stop
d
u
e to error (
E3
)
rec
u
r?
Is the
high press
u
re s
w
itch
operating
v
al
u
e normal
(i.e., 5
8
0psi)?
Are the
characteristics of the high
press
u
re sensor normal?
(
*
1)
Replace the high press
u
re s
w
itch.
Replace the high press
u
re sensor.
Is the
press
u
re detected
w
ith
the PCB normal?
(
*
2)
Replace the main PCB.
· The high press
u
re sensor is normal, and the press
u
re detected
w
ith the PCB is also normal.
· The high press
u
re has really
b
ecome high.
CHECK 1
Remo
v
e the ca
u
ses
b
y
w
hich the high press
u
re has
b
ecome high.
*
1: Make a comparison
b
et
w
een the
v
oltage of the press
u
re sensor and that read
b
y the
press
u
re ga
u
ge.
(As to the
v
oltage of the press
u
re sensor, make meas
u
rement of
v
oltage at the connector,
and then con
v
ert it to press
u
re according to information on P.164.)
*
2: Make a comparison
b
et
w
een the high press
u
re
v
al
u
e checked
w
ith the Ser
v
ice Checker
and the
v
oltage of the press
u
re sensor (
*
1).
*
3: Make meas
u
rement of
v
oltage of the press
u
re sensor.
Connector for high
press
u
re sensor (Red)
High
press
u
re
sensor
Micro-comp
u
ter
A/D inp
u
t
Make meas
u
rement of DC
v
oltage
b
et
w
een these
w
ires.
Red
Black
W
hite
Caution
Be s
u
re to t
u
rn off the po
w
er s
w
itch
b
efore connecting or disconnecting
the connector or parts may
b
e damaged.
CHECK 1
