ESAB EMP 215IC Service Manual page 68

ESAB EMS215IC/EMP215IC
SMAW Process Test Problems
1) Cannot change weld process
a) Defective ENCODER PCB7
Perform ENCODER PCB Test subsection 6.06
2) No voltage between +/- Weld Output Connectors
a) Defective CONTROL PCB3
D33 should be on (Very dim). If it is not on, replace Control PCB3
b) Defective OUTPUT DIODE PCB4
Perform OUTPUT DIODE PCB4 Test, see subsection 6.06
c) Defective POWER PCB2
Replace POWER PCB2
3) No output current flows when connected to load.
a) Open work cable or electrode holder cable
Replace if open
b) Poor work cable connection to table or work piece
Clean connection
4) Cannot change output current setting
a) Defective ENCODER PCB5
Perform ENCODER PCB Test, see subsection 6.06
b) Defective CS1 Current Sensor
Perform CS-1 Test, see subsection 6.06
c) Defective CONTROL PCB3
d) Defective USER INTERFACE PCB1
5) ERROR MESSAGE : VOLTAGE FEEDBACK FAULT
a) Open connection from output terminals to CN1 connector on Control PCB1
Check that connector is securely installed and check continuity of wires and replace if open
b) Defective CONTROL PCB3
Replace PCB3
GTAW (Lift TIG) Process Test Problems
1) Cannot change weld process from SMAW to GTAW
a) Defective ENCODER PCB7
Perform ENCODER PCB Test subsection 6.06
2) No output voltage from unit when remote device trigger is closed
a) Defective Remote Device
Check LED88 on Control pcb. If it is not coming on when trigger is closed.
Perform REMOTE CONTROL START (TRIGGER) Test, see subsection 6.06
b) Defective CONTROL PCB3
D45 & D89 should turn on, at least momentarily when trigger is depressed. If not, Replace CON-
TROL PCB3
6-22 TROUBLESHOOTING Manual 0463 413 001