Thermal Dynamics PakMaster 50 XL Plus, Service Manual

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Manual 0-2745 19 SECTION 4: SERVICE TROUBLESHOOTING
a. If voltage is less than 2VDC replace CD PC
Board.
A-01188
CD PC Board
J11
Pin 4
Pin 5
D. AC indicator ON; TEMP indicator off; Gas flows;
GAS and DC indicators ON; Spark at gap on CD
PC Board and CD enable indicator (D2) on Logic/
Gate PC Board ON; No arc or intermittent arc in
torch
1. Gas pressure(s) set incorrectly (too high)
a. Refer to appropriate Torch Manual
2. Oil/moisture in air lines
a. Purge system. If problem corrected add filters
in line with air source
3. Incorrect torch parts
a. Refer to appropriate Torch Instruction Manual
4. Faulty leads
a. Check continuity per appropriate Torch Instruc-
tion Manual
5. Faulty torch
a. Check continuity per appropriate Torch Instruc-
tion Manual
6. Faulty connection of wire #16 or #17 to Pilot Output
PC Board
a. Check wiring connection
A-01400
Pilot Output PC Board
E23
Wire #17
E24
Wire #16
To
p
7. Faulty Logic/Gate PC Board
Check D39 & D2 on the Logic/Gate PC Board
a. If D39 & D2 are not on, replace Logic/Gate
Board.
Measure for 12 vdc on Logic/Gate PC Board from
J5-6 to J5-7.
a. If voltage is low, then replace Logic/Gate PC
Board.
8. Faulty PCR Relay
Install a jumper between wires #12 and #14. Re-
try piloting again.
a. If torch pilots with jumper installed, replace PCR
Relay
4.08 Main Arc Problems
Locate your symptom below:
A. Main cutting arc will not initiate
1. Work cable not connected.
a. Connect work cable.