TECO JNEV-401~403-H3 - 5.3 Troubleshooting Flowcharts 7300 EV Series

Chapter 5 Trouble shooting and maintenance
5-7
5.3 Troubleshooting Flowcharts 7300EV Series
Is failure fully
understood?
Any signs of
burnout and
damage?
Is main loop
I.G.B.T normal
Is the main circuit
diode intact?
Replace I.G.B.T
Replace Diode
Ch
ec
k
an
d
rep
l
ace
b
urnt
and damaged parts
Any abnormalities
in appearances?
Are displays and
indicators of the
operating unit present?
Read fault?
Any fault
display?
Check Fault log using
parameter F-54 with▼key.
Is the DC input
voltage controlling
the
p
owe
r
correc
t
l
y
?
Is +5V control
voltage correct.
Is the error
eliminated after
replacing control
board?
Replace the driver boar
d
Check terminals and
wiring
R
ep
l
ace t
h
e
L
e
d
Perform detaile
d
fault
checks
* to next page
YES
YES
YES
YES
N
O
N
O
N
O
N
O
N
O
N
O
N
O
N
O
N
O
N
O
YES
YES
YES
YES
YES
YES
YES
R
ep
l
ace contro
l
b
oar
d
an
d
di
g
ital o
p
eratin
g
unit
N
O
YES
EV Inverter faults
Symptoms other than burn out,
damage, or fuse meltdown in
the inverter?
Fault
messages?
Check according to displayed
fault messages
Vi
sua
ll
y c
h
ec
k
contro
ll
er an
d
driver boards
Apply powe
r
Any fault
display?
Fault log F-54
Replace defective board
Is LED lit?
N
O
Figure 5-1 General troubleshooting flowchart