Fuji Electric FVR-C11S-7EN Series - Page 68

FVR-C11S-EN
7-3 7 Troubleshootin
g
7
3) Undervolta
g
e(LU) 4) Overheatin
g
of heat sink (OH1)
LU
Has (momentar
y
)
power failure occurred?
Yes
Reset and restart
operation.
(If F14 is 0,1)
No
Fault
y
parts or loose
connection in power
control circuit?
Yes
Replace fault
y
parts
and fix connection.
No
Power suppl
y
volta
g
e
within specified value?
No
Modif
y
power
distribution
s
y
stem to satisf
y
specified value.
Yes
An
y
load requirin
g
lar
g
e
startin
g
current within
the same power distri-
bution
g
roup?
Yes
No
Does LU activate when
circuit breaker or ma
g
-
netic contractor
switched to ON?
Yes
Power transformer
capacit
y
adequate?
No Yes
Probabl
y
fault
y
control
circuit of inverter or
error because of noise,
etc.
Contact Fuji Electric.
Probabl
y
fault
y
inverter.
Contact Fuji Electric.
Heat sink overheatin
g
(OH1)
Load excessive?
Yes
Reduce load.
No
Coolin
g
fan rotatin
g
?
No
Replace coolin
g
fan.
Yes
Coolin
g
air passa
g
e
blocked up?
Yes
Remove obstacles.
No
Ambient temperature
within specified value?
No
Arran
g
e peripheral
conditions to secure
specified value.
Yes
Probabl
y
fault
y
inverter
or error because of
noise, etc.
Contact Fuji Electric.