Raider RDP-IW23 User Manual page 15

7. TROUBLESHOOTING AND FAULT FINDING
Notes: 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.
Fan is working and
abnormal indicator is lit,
no welding output.
8. Disposal.
The machine, accessories and packaging should be sorted for environmental-
friendly recycling. The plastic components are labelled for categorized recycling. Do
not dispose of power tools into household waste! According the European Guideline
2002/96/EC for Waste Electrical and Electronic Equipment and its implementation into
national right, power tools that are no longer usable must be collected separately and
disposed of in an environmentally correct manner.
Remedy
A. Make sure power switch is close.
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.
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.
A. Overload current protection may start, please turn off machine first, then
restart it after abnormal indicator is off.
B. Overheat protection may start, it will become normal in 2-3min
C. Inverter circuit may go wrong. Please disconnect the power supply plug
of the main transformer on MOS board (near fan VH-05), then restart the
machine.
a) If abnormal indicator is still lit, that means some fieldistors on IGBT board
are damaged. Check and replace it.
b) If abnormal indicator is off:
1) Maybe transformer of middle board is damaged, measure primary
inductance value and Q value of main transformer by inductance bridge.
2) Maybe some of secondary rectifier tube of transformer is broken, check
and replace rectifier tube.
D. Maybe feedback circuit is in fault.
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