Tweco 81 with SL100SV - Manual (Page 71)

Manual 0-4641 5-7 SERVICE
5
6. Unit internal fuse blown or loose
a. If blown, double-check input voltage and replace fuse per Section 5.09-C.
7. Actual input voltage does not correspond to voltage of unit
a. Verify that the input line voltage is correct. Refer to Section 2, Input Wiring Requirements.
B. Gas flows continuously when power is turned on, AC indicator flashes
1. Torch switch is activated (closed) before user turns power on.
a. Release torch switch.
2. Faulty torch switch in CNC Control.
a. Check torch switch for continuity. Replace if necessary.
C. Gas flows continuously; Torch will not pilot when torch switch is activated; AC indicator ON
1. System is in SET mode
a. Change RUN / Rapid Auto Restart / SET switch to RUN (up).
D. No gas flow; RUN / Rapid Auto Restart / SET switch in SET position; Fans operate; AC indicator ON; GAS
indicator OFF
1. Gas not connected
a. Check gas connections.
2. Gas pressure too low for power supply operation
a. Adjust pressure to 70-75 psi / 4.8 - 5.2 bar.
E. Torch will not pilot; gas flows; AC indicator ON, GAS , TEMP , and DC indicators OFF
1. Gas pressure is below power supply minimum requirement.
a. Adjust pressure to 70-75 psi / 4.8 - 5.2 bar.
NOTE
Minimum pressure for power supply operation is lower than minimum for torch operation.
F. Torch will not pilot; gas flows; AC and Gas indicators ON; DC and TEMP indicators OFF
1. Gas pressure is below torch minimum requirement (Minimum pressure for power supply operation is lower than
minimum required for torch operation.)
a. Adjust pressure to 70-75 psi / 4.8 - 5.2 bar.
2. Positive and negative wire connections to automation interface PC Board terminals J2-1 and J2-3 are reversed.
a. Check wire connections, correct if necessary.
NOTE
This condition applies to CNC Controllers (other than the SC-11) with semiconductor switches.