Check Fault; Troubleshooting - Grizzly G0881 Owner's Manual

CHECK FAULT

Notes: If user wants to operate machine as following, the operator must
be a personnel in a specific field of electricity and safety and hold the
relevant certificate that proves their ability and knowledge. Before
maintenance, contact with our company for authorization is suggested.

1. Troubleshooting

Problem Solutions
A. Make sure power switch is close.
B. Make sure electrify wire net (which is connected to input cable) is in work.
C. Heat-sense resistance(4 pieces) is broken.(24V relay has problem)
Indicator of power D. Power source board (Bottom board has problem, no DC537V output
switch is not lit, fan voltage);
is not working and
there is not welding
output.
E. Subsidiary power source on the control board has problem. (Contact
distributor or manufacturer.)
A. Check if components are poor connects.
B. Check if connector of output terminal is break circuit and poor connect.
C. Maybe inverter circuit is in fault;
Fan is working and
abnormal indicator
is lit, but there is no
welding output.
D. Maybe feedback circuit is in fault.
a) Silicon bridge circuit is broken, cable is loosen.
b) Part of board is burnt.
c) Check cable between air switch and the power source board, power
board between MOS board.
please pull up the power plug of main transformer (near VH-07 fan),
which is on MOS board, then open the machine again.
(1) If abnormal indicator is still lit, some of MOS board is damaged,
check and replace it.
(2) If abnormal indicator is not lit:
a. Maybe transformer of middle board is damaged, measure
primary indutance volume and Q volume of main transformer
by inductance bridge.
Primary volume is parallel circuit, L=l.2-2.0Mh, Q>40
If inductance volume and Q volume is low, replace it.
b. Maybe some of secondary rectifier tube of transformer is broken,
check and replace rectifier tube.