Grizzly H8155 - Manual (Page 17)

H8155 MIG Welder
-15-
Review the troubleshooting and procedures in this section to fix or adjust your machine if a problem devel-
ops. If you need replacement parts or you are unsure of your repair skills, then feel free to call our Technical
Support at (570) 546-9663.
SECTION 6: SERVICE
Troubleshooting
Symptom Possible Cause Possible Solution
Welder does not
power up or the
breaker trips. 1. Plug/receptacle is at fault or wired incor-
rectly.
2. Wiring is open/has high resistance.
3. ON/OFF switch is at fault.
4. Duty cycle exceeded.
1. Test for good contacts; correct the wiring.
2. Check for broken wires or disconnected/corroded
connections, and repair/replace as necessary.
3. Replace faulty ON/OFF switch.
4. Allow several minutes to cool with the On/Off switch
in the Off position, then attempt to power up the
machine again.
Wire does not feed
properly. 1. Insufficient wire feed spring tension
2. Wire guide sheath in the welding torch
assembly is blocked.
3. Wire spool axle nut is too tight.
4. Wire reel has oxidized or poorly wound
wire.
1. Tighten the spring tension knob.
2. Clean wire sheath or replace welding torch assem-
bly.
3. Loosen nut so the reels moves freely.
4. Replace wire wheel.
Reduced welding
power. 1. Ground cable is not connected or is poorly
connected.
2. Internal connection loose on switches.
3. One or more rectifiers failed.
1. Check the ground cable for proper connection.
2. A qualified welding technician should open the unit
and check for loose connections.
3. A qualified welding technician should open the unit
and check for burnt rectifiers.
Porous or spongy
welds. 1. Little or no gas.
2. Clogged holes in welding torch.
3. Solenoid valve blocked
4. Poor quality gas or wire.
1. Check presence of gas, condition of supply line, and
gas pressure.
2. Clear clogged holes using compressed air.
3. A qualified welding technician should open the unit
and check solenoid operation and electrical connec-
tion.
4. Gas must be very dry. Use a moisture filter. Use a
different type of wire.
Gas supply does not
switch off. 1. Worn or dirty solenoid valve. 1. A qualified technician should open the unit and
dismantle the valve to clean the orifice and seating
element.
Pressing welding
torch trigger pro-
duces no result. 1. Faulty welding torch trigger; disconnected
or broken control cables.
2. Overload controller defective.
1. A qualified welding technician should open the unit
and remove the torch connection plug and short
circuit poles. Check and repair control cables.
2. A qualified welding technician should open the unit
and replace the overload controller.
Troubleshooting