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710255
7528%/(6+227,1*
Please refer to other manual pages and wiring diagrams for location of fuses, terminal strips, etc.
Please refer to Wiring & Logic Diagrams for Bills of Material.
TROUBLE
POSSIBLE CAUSE
REMEDY
___________________________________________________________________________________
Power On Light will
not light.
---------------------------
Control will not initiate.
---------------------------
Control initiates, valve
light comes on, but
electrodes do not
close.
I.
Fuse F1, type BBS 6/10,
control fuse blown.
II.
Defective Power On Light.
III.
Main welder disconnect
Open.
IV.
L2 wire to customer
terminal strip missing.
--------------------------------------
I.
Initiation switch(s)
defective.
II.
Loose or broken wire(s) at
initiation switch.
III.
Fuses F6 - F8 valve fuses
blown.
IV.
Defective Control/Display
or Terminal Strip/Firing
PCB.
---------------------------------------
I.
Solenoid valve circuit
mis-wired or broken wires.
II.
No air or blocked air line.
1.
Check that control is wired for
proper input line voltage. (H1,
H2, H3 and H4 and CTH1,
CTH2, CTH3 and CTH4
jumpers on customer terminal
strip).
1.
Replace Power On Light.
1.
Check that fuse or circuit
breaker is of sufficient size for
KVA demand of welding
transformer.
1.
Add L2 wire (minimum 18
AWG).
-------------------------------------------
1.
Replace switch(s).
1.
Check for loose or broken
wire(s) at initiation switch(s)
and at customer terminal strip
(FS1, FS2, etc.)
1.
Check Solenoid coil for short.
2.
Check for proper solenoid coil
voltage.
1.
Replace board with another
board stamped with the same
Assembly Number.
-------------------------------------------
1.
Check terminals VL1, SV1 and
SV2, and associated wiring. (see
wiring diagram)
1.
Be sure air is on.
2.
Repair or replace air accesso-
ries.
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