ProArc PT-103, Owner'S Manual

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8
3.2 TROUBLESHOOTING GUIDE (CB-102)
SYMPTOMS POSSIBLE CAUSES / REMEDIES
Weld timer function no
response.
A. Take VR Board JP2 connector off. Rotate the Start Delay knob and
measure JP2 Pin 1 & 2’s resistance. The value should vary from
0-10k
Ω. If there is no variation, check for any disconnection or
replace VR2.
B. Check for any loose cable connection between VR Board and Switch
Board.
Overload (Blinking Red LED)
Inspect the work and make sure it isn’t over-spec (weight /
eccentricity ...etc). Place the Work/Move switch (SW2) in “OFF” position
to reset the system.
Home sequence problem
A. Work / Move switch (SW2) malfunction, replace Switch Board.
B. If the green LED is flashing and there is no rotation, place the
Work/Move switch (SW2) in “Move” position and adjust the welding
speed knob (VR1) to desired speed. Restart the homing sequence.
C. Proximity switch too far
：
Adjust the proximity switch so it can sense
the homing block correctly.
D. Proximity switch malfunction: use a screwdriver to test trigger the
proximity switch. Replace when necessary.
Overlap delay function
inaccurate or no response
A. Take VR Board JP4 connector off. Rotate the OVERLAP knob and
measure JP4 Pin 1 & 2’s resistance. The value should vary from
0-10k
Ω. If there is no variation, check for any disconnection or
replace VR4.
B. Check for any loose cable connection between VR Board and
Switch Board.
Welding start delay function no
response
A. Take VR Board JP3 connector off. Rotate the START DELAY knob
and measure JP3 Pin 1 & 2’s resistance. The value should vary
from 0-10k
Ω. If there is no variation, check for any disconnection or
replace VR3.
B. Check for any loose cable connection between VR Board and
Switch Board