OWNER’S MANUAL - 12 -
QUESTIONS TO BE RUN INTO DURING WELDING
The phenomenon listed below may be relevant to accessories used, welding material, surroundings and power supply.
Pleas improve surroundings and avoid these situations.
A. Arc starting difficulty. Arc interruption happens easily:
1) Examine whether grounding wire clamp contacts with the work pieces well.
2) Examine whether each joint has improper contact.
B. The output current fails to reach rated value:
The deviation of power voltage from rated value may cause that the output current does no accord with adjusted value.
When the power voltage is lower than rated value, the maximum output current may be lower than rated value.
C. The current can not keep stable during operation:
This situation may have connection to the following factors:
1) The voltage of electric power network changes;
2) Serious interference from electric power network or other electric facilities.
D. Gas pores in welds:
1) Examine whether the gas supply circuit has leakage.
2) Examine whether there is foreign substance such as oil, dirt, rust, paint etc. on the base metal.
MAINTENANCE
WARNING!
The power shall be cut off completely before all maintenance, overhaul works. Make sure to pull
out power plug before opening the casing.
1. Remove dirt regularly with dry compressed air. If the welding machine is used in surroundings with heavy smoke and
polluted air, carry out dust removal treatment at least once in a month.
2. The pressure of compressed air shall fall to required level to prevent damage to small components in the machine.
3. Examine inside electric joints and ensure perfect contact (Especially plugs and sockets). Fasten the loosing joints. In
case of oxidation, remove oxide film with sand paper and connect again.
4. Prevent water from entering into the machine and prevent the machine from getting moist. If any, blow and dry.
Measure the insulation with megohmmeter to make sure it is qualified for use.
5. If the welding machine is not used for a long time, pack the machine in original package and store in dry
surroundings.
6.
Every time the wire feeder operates for 300hours, grind the electrical carbon brush and clear up the armature
commutator. Rinse speed reducer, apply 2# Molybdenum Disulfide lubricant to the turbine, whirlpool rod and bearing.
