2 troubleshooting – Alpha Technologies CFR Redundant Control Unit User Manual
Page 18
16
4
Maintenance
4.2
Troubleshooting
The most common problems, symptoms and causes are listed in Figure 4.3. It starts off with
the simplest problems, working to the most complex. If the operator can’t resolve the problem,
contact Alpha Technologies. Maintenance and troubleshooting should be done only by quali-
fied personnel.
M
O
T
P
M
Y
S
M
O
T
P
M
Y
S
M
O
T
P
M
Y
S
M
O
T
P
M
Y
S
M
O
T
P
M
Y
S
E
S
U
A
C
E
L
B
A
B
O
R
P
E
S
U
A
C
E
L
B
A
B
O
R
P
E
S
U
A
C
E
L
B
A
B
O
R
P
E
S
U
A
C
E
L
B
A
B
O
R
P
E
S
U
A
C
E
L
B
A
B
O
R
P
N
O
I
T
U
L
O
S
N
O
I
T
U
L
O
S
N
O
I
T
U
L
O
S
N
O
I
T
U
L
O
S
N
O
I
T
U
L
O
S
r
e
f
s
n
a
r
t
t
o
n
l
l
i
w
U
C
R
r
e
f
s
n
a
r
t
t
o
n
l
l
i
w
U
C
R
r
e
f
s
n
a
r
t
t
o
n
l
l
i
w
U
C
R
r
e
f
s
n
a
r
t
t
o
n
l
l
i
w
U
C
R
r
e
f
s
n
a
r
t
t
o
n
l
l
i
w
U
C
R
e
h
t
o
t
t
u
p
n
I
n
o
m
o
r
f
r
e
h
t
o
d
e
p
p
i
r
t
r
e
k
a
e
r
b
t
i
u
c
r
i
C
r
e
k
a
e
r
B
t
e
s
e
R
w
o
l
o
o
t
e
g
a
t
l
o
V
e
g
a
t
l
o
v
k
c
e
h
C
*
d
r
a
o
b
c
i
g
o
l
n
o
e
s
u
f
n
e
p
O
e
s
u
F
e
c
a
l
p
e
R
*
n
e
p
o
r
o
d
e
s
u
f
r
o
t
c
a
t
n
o
C
U
C
R
e
c
a
l
p
e
R
*
c
i
g
o
l
l
o
r
t
n
o
c
h
t
i
w
m
e
l
b
o
r
P
U
C
R
e
c
a
l
p
e
R
*
n
o
"
K
O
s
s
a
p
y
B
l
a
u
n
a
M
"
n
o
"
K
O
s
s
a
p
y
B
l
a
u
n
a
M
"
n
o
"
K
O
s
s
a
p
y
B
l
a
u
n
a
M
"
n
o
"
K
O
s
s
a
p
y
B
l
a
u
n
a
M
"
n
o
"
K
O
s
s
a
p
y
B
l
a
u
n
a
M
"
n
o
n
r
u
t
t
o
n
l
l
i
w
U
C
R
d
e
p
p
i
r
t
r
e
k
a
e
r
b
t
i
u
c
r
i
C
r
e
k
a
e
r
B
t
e
s
e
R
f
o
t
u
o
2
t
u
p
n
I
d
n
a
1
t
u
p
n
I
e
s
a
h
p
t
c
e
r
r
o
c
d
n
a
g
n
i
s
a
h
p
k
c
e
h
C
*
y
r
a
s
s
e
c
e
n
s
a
*
These Items are to be performed only by a qualified technician
Figure 4.3
Troubleshooting Chart