TM-354 Page 23
5-4. Troubleshooting
Trouble Remedy
No weld output; unit completely
Place line disconnect switch in On position (see Section 3-10).
inoperative.
Check and replace line fuse(s), if necessary (see Section 3-10).
Check for proper input power connections (see Section 3-10).
Check for proper jumper link position (see Section 3-10).
No weld output; unit on. If using remote control, place Output switch in Remote 14 position, and make sure remote control is
connected to Remote 14 receptacle. If remote is not being used, place Output switch in On position
(see Section 4-1).
Check, repair, or replace remote control.
Unit overheated. Allow unit to cool with fans On (see Section 3-2).
Have Factory Authorized Service Agent check control board PC1.
Unit provides only maximum or
Make sure Amperage switch is in proper position (see Section 4-1).
minimum weld output.
Have Factory Authorized Service Agent check hall device HD1, filter board PC2, and control board
PC1.
Erratic or improper weld output. Use proper size and type of weld cable (see Section 3-6).
Clean and tighten all weld connections.
Check position of Output Selector switch (see Section Figure 4-1).
If using remote control, check position of Amperage Adjustment control (see Section 4-1).
No control of weld output. If using remote control, place Output switch in Remote 14 position, and make sure remote control is
connected to Remote 14 receptacle. If remote is not being used, place Output switch in On position
(see Section 4-1).
Make sure Amperage switch is in proper position (see Section 4-1).
No Arc/Balance Control. Make sure Arc/Balance Control is in proper position (see Section 4-1).
Have Factory Authorized Service Agent check main potentiometer board PC5 and control board PC1.
No output from duplex receptacle RC2
and no high frequency.
Reset circuit breaker CB1 (see Section 5-2).
Remote 14 receptacle RC1 not
working properly.
Be sure Amperage control switch and Output switch are in Remote 14 position (see Section 4-1).
Lack of high frequency; difficulty in
Reset circuit breaker CB1 (see Section 5-2).
starting GTAW arc.
Select proper size tungsten.
Check High Frequency Intensity control setting (see Figure 4-1).
Be sure electrode holder cable is not close to any grounded metal.
Check cables and torch for cracked insulation or bad connections. Repair or replace.
Check spark gaps (see Section 5-3).
Wandering arc – poor control of
Reduce gas flow rate.
direction of arc.
Select proper size tungsten.
Properly prepare tungsten.
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