Fuji Electric FVR-C11S-7EN Series - Page 69

7 Troubleshootin
g
7-4
FVR-C11S-EN
7
5) External alarm input (OH2) 6) Inverter overload (OLU) or motor overload
(OL)
OH2
Si
g
nal from external
device connected
between control circuit
terminals
THR - P24/CM?
No
Connect alarm si
g
nal
contact. Short-circuit
between terminals
THR - P24/CM if no
si
g
nal is input.
Yes
Is the alarm function of
the external device
operatin
g
correctl
y
?
No
Probabl
y
fault
y
inverter or error be-
cause of noise.
Contact Fuji Electric.
Yes
Remove the cause of
alarm function
activation.
OLU OL
Do characteris-
tics of electronic
thermal O/L rela
y
and those of mo-
tor overload
match?
No
Connect thermal
O/L rela
y
externall
y
.
Yes
Is electronic ther-
mal O/L rela
y
set-
tin
g
correct?
No
Set to correct
level.
Yes
Load excessive?
No
Probabl
y
fault
y
inverter or error
because of
noise, etc.
Contact
Fuji Electric.
Yes
Reduce load or
increase inverter
capacit
y