Hitachi RAC-25FX8, Руководство по обслуживанию

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– 184 –
LD301 b
links 12 times
.
F
an loc
k error
.
Is CN24 connected? Is the propeller f
an
loc
k
ed?
Ha
v
e
the 1A fuse and
R107 b
lo
wn?
• Is 15V being generated? * Chec
k v
o
ltage both between
CN18
④
and
⑤
on the control
P.
W.
B
., and between
“+15V”
and
“15-0V”
(silk-screened) on
the po
w
er P
.W
.B
.
If no output v
o
ltage is present
on the po
w
e
r P
.W
.B
. side
,
replace the po
w
er P
.W
.B
.
Is the f
an operating?
(An error occurs after the fan operates f
or 2 minutes
.)
Is the v
o
ltage between
④
and
⑥
at CN24 nor
mal?
(Nor
mally
, the v
o
ltage is
abo
v
e
appro
x.
DC1.7V
.)
Connect the connector
.
Remo
v
e
an
y
obstr
uctions
.
Replace the f
an motor
and main P
.W
.B
.
Is the v
oltage between
④
and
⑦
at CN24 nor
mal?
Chec
k to see if the v
oltage is
within 2.5V
±
0.5V using a
tester
.
(In eff
ect, the output v
oltage
is alter
nately s
witched
between 5V and 0V
.)
Replace the main P.
W
.B
.
Replace the f
an motor
.
Ye
s
No
No No Ye
s
No
No
No
No
No
Ye
s
Ye
s
Ye
s
Ye
s
Ye
s
Ye
s