Troubleshooting - Fieldmann FDIS 20140-E Manual

EN 16

Troubleshooting

9. TROUBLESHOOTING
WARNING!
The following operations must be performed by qualified electricians with valid
certifications. Before maintenance, please contact with us for professional suggestion.
Fault symptom
Power indicator is not lit, fan is
not working, no welding output.
Power indicator is lit, fan
doesn't work, no welding
output.
Erratic welding output current or
out of control of potentiometer.
Fan is working and abnormal
indicator is not lit, no welding
output.
Remedy
A. Make sure power switch is close.
B. Make sure the electric wire net connecting to input cable is working
alright
A. Input cable is possibly connected to 380V power, which causes over
voltage protection circuit is starting. Connect input cable to 220V
power, then restart the machine.
B. Erratic 220V power supply (input cable is too thin and long) or input
cable is connected to electricity network would start overload voltage
protection circuit. Increase section of input cable or tighten input
contact. Turn off machine for 2–3 min and restart it.
C. Turn on and off power switch continuously would start overload
voltage protection circuit. Turn off machine for 2–3 min and restart it.
D. Cables are loosed between power switch and power source board,
tighten them again.
A. 1K potentiometer is damaged, replace it.
B. Terminal of output is broken circuit or poor connect.
A. Check if components are poor connects.
B. Check if connector of output terminal is break circuit and poor connect.
C. Check voltage between power source board and MOS board (VH-07) is
about DC 308V.
D. If green indicator is not lit in assistant power of MOS board, please
connect with seller or our company and replace it.
E. If there is some question in control circuit, please connect with seller or
our company and replace it.
FDIS 20140-E