Kemppi Minarc 150 Service Manual

General
This machine may be repaired only by authorized repair shops and persons!
The visual check must be done first, to find possible damages; loose wires, breaks and signs
of overheating.
D
I
S
T
U
R
B
A
N
C
E
P
O
S
S
I
B
L
E
C
A
U
S
E
R
E
M
E
D
Y
Power source doesn´t start; OCV
~ 0 V;
C
o
o
l
i
n
g
f
a
n
M
0
0
1
D
i
s
c
o
n
n
e
c
t
t
h
e
f
a
n
c
o
n
n
e
c
t
o
r
X
2
0
and start the power source again. If
the power source starts and the
OCV is ok, change the fan.
The rectifier diodes are in short
circuit.
Check the secondary diodes
condition and change if needed. See
the changing of secondary diodes,
page 26.
Faulty primary circuit power
semiconductor.
Check the primary side power
semiconductors. If the voltage over
the PTC R30 is more than ~ 230
Vac then there is a short circuit in
the primary circuit. Change the
faulty power semiconductor. See
the IGBT transistor testing on page
26.
F
a
u
l
ty
c
o
n
t
ro
l
c
a
r
d
A
0
0
1
.
C
h
a
n
g
e
t
h
e
c
on
t
ro
l
c
a
r
d
A
0
0
1
.
The power source starts and the
OCV rises up to ~85 V, after
which the power source shuts
down. Th epower source can not
be loaded. The automatic fuses
are blown during start up.
R
e
l
a
y
K
1
C
h
e
c
k
t
h
e
r
e
l
a
y
o
p
e
r
a
t
i
o
n
.
Welding current can´t be adjusted
by potentiometer R001.
Faulty power adjustment
potentiometer R001.
Check the potentiometer condition
(R001 = 10 k
Ω
)
F
a
u
l
ty
c
o
n
t
r
o
l c
a
r
d A
0
0
1
.
C
h
a
n
g
e c
o
n
t
r
o
l c
a
r
d A
0
0
1
.
Troubleshooting diagram
7

Kemppi Minarc 150 Specifications

General

Brand	Kemppi
Model	Minarc 150
Category	Welding System
Language	English