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Fault Symptoms Rectication
3. While this equipment is operated,
the built-in fan functions,
the fault indicator is off,
no HF electricity releasing,
arc does not start.
1. The normal voltage of positive and negative pole of board
VH-07 should be DC 380V.
1.1 Possible short circuit, and possible misconnection of silicon
bridge with the PCB.
1.2 Possible electricity leakage of capacitors; replace them if
necessary.
2. The green light indicator of secondary power supply of top PCB
should be on. Otherwise, it indicates that the secondary power
supply is not functioning. Check whether the connection is
available. If fault cannot be rectified, please contact supplier for
further advice.
3. Possible unavailability of connection inside the equipment.
Check and reconnect if necessary.
4. Possible malfunction of control circuit. Check and contact the
supplier for further advice.
5. Possible damage of the welding torch. Replace it if necessary.
4. While this equipment is operated,
fault indicator is off,
HF electricity is releasing,
and welding current output is unavailable.
1. Possible disconnection of welding torch cable.
2. Possible disconnection of earth cable, or misconnection of the
earth cable and work piece.
3. The connection between positive output terminal or the gas or
electricity output terminal and this welding equipment is possibly
unavailable. Reconnect them if necessary.
5. While this equipment is operated,
the fault indicator is off, no electricity
releasing, and arc starts.
1. The cable connection between the transformer of arc starting
and power PCB is possibly unavailable. Check and reconnect it.
2. Possible oxidization of electricity releasing parts or the
distance is larger than the maximum distance allowed. Remove
the oxidization of the electricity releasing parts and adjust the
distance of the electricity releasing parts to range of 1mm.
3. Possible damage to MMA/TIG switch. Replace them if
necessary.
4. Components of HF arc starting circuit are possibly damaged.
Check and replace them if necessary.
6. While this equipment is operated,
the fault indicator is on,
and there is no output.
1. It is possible the machine is in over-current protection status.
Switch off the power supply, wait until the fault indicator is off,
and restart the welding equipment.
2. It is possible the machine is in over-heating protection status.
Wait until the fault indicator is off, and the welding operation can
begin.
3. Possible damage of feed-back circuit. Compensate the fault if
necessary.
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