Manual 0-2898 4-5 TROUBLESHOOTING
D. AC indicator flashing, TEMP indicator OFF (on
system start-up); RUN / SET switch in RUN
position
1. Torch shield cup loose
a. Shut power supply off. Tighten shield cup se-
curely. Turn unit back on.
2. Torch connection at power supply loose.
a. Shut power supply off. Tighten torch leads
male connector into female receptacle on power
supply securely. Turn power supply back on.
3. Faulty PIP switch or open PIP wires in torch leads
a. Check torch PIP switch for continuity.
b. Check torch PIP leads for continuity.
4. J3 wire connector disconnected from PC board.
a. Check J3 connector; reconnect if necessary.
E. Gas flows continuously; AC indicator ON; TEMP
indicator OFF; DC indicator OFF; GAS indicator
ON
1. RUN /SET Switch in SET (down) position
a. Change to RUN (up) position.
2. Faulty RUN / SET switch
a. Disconnect primary input power. Disconnect
wires from RUN / SET switch. Put switch in
RUN (up) position. Check switch for open con-
dition. If switch is shorted, replace switch.
F. AC indicator flashing (on start-up); TEMP
indicator OFF; RUN / SET switch in RUN posi-
tion; gas flows from torch
1. Torch switch stuck ON or torch switch wires shorted
a. Check indicator D22 on PC board. Indicator
should be OFF unless torch switch is closed.
b. Check torch switch for proper operation.
c. Check torch switch for coninuity.
G. AC indicator flashing (on start-up); TEMP indica-
tor OFF, RUN / SET switch in RUN position,
1. Torch tip, starter cartridge, or electrode missing or badly
worn.
a. Check torch parts; replace as needed.
2. Dirty or defective starter cartridge
a. Check starter cartridge; clean or replace as
needed.
3. Wire E8 not connected to PC Board terminal E8
a. Check connection; reconnect if necessary.
4. PC board fault circuit defective
a. Replace PC board
H. AC indicator flashes; Temp indicator steady ON
1. Fan wire harness disconnected from terminal J4 on PC
board.
a. Check fan wire harness; reconnect if necessary
2. Faulty fan or fan wire harness
a. Check fan and harness; replace as needed.
I. AC indicator flashes; TEMP indicator blinks
slowly; RUN/SET switch in SET position
1. Fan is blocked
a. Check fan blades; clear as needed.
2. Faulty PC Board
a. Replace PC Board
J. No gas flow; AC indicator ON; TEMP indicator
OFF; DC indicator OFF; Gas indicator ON; RUN/
SET switch in SET position
1. Inlet gas pressure too high (over 120 psi / 8.3 bar)
a. Set inlet gas pressure below 120 psi / 8.3 bar
2. Faulty RUN/SET switch
a. Disconnect wires from RUN/SET switch. Test
switch for continuity in SET position. If no con-
tinuity in SET position, replace switch.
3. Faulty gas solenoid or solenoid wire harness.
a. Disconnect solenoid wire harness from termi-
nal J1 on PC board. Test resistance in wire har-
ness. Resistance should be 20 ohm ± 5 ohm. If
resistance is not correct, replace solenoid assem-
bly.
4. Faulty PC board
a. Leave RUN/SET switch in SET position. Dis-
connect wire harness from terminal J1 on PC
board. Test voltage across pins of terminal J1.
Voltage should be 10-13vdc. If voltage is not
correct, replace PC board.
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