Thermal Dynamics 51 CUTMASTER, Руководство по обслуживанию

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TROUBLESHOOTING 4-12 Manual 0-2972
3. Torch starter cartridge is stuck
a. Turn off power supply. Remove shield cup, tip,
and starter cartridge. Check lower end fitting
on starter cartridge for free movement. Replace
cartridge if lower end fitting does not move freely.
Lower End Fitting
Start Cartridge
Art # A-03621
4. Worn or faulty torch parts
a. Inspect torch consumable parts. Replace if nec-
essary.
C. Torch will not pilot; AC , TEMP , and
GAS indicators ON, DC indicator off
A
Ar
t # A-03
9
8
9
1. Air flow blocked
a. Check for blocked air flow around the unit and
correct condition.
2. Unit is overheated
a. Let unit cool down for at least 5 minutes. Make
sure the unit has not been operated beyond Duty
Cycle limit. Refer to duty cycle data in Specifi-
cations Section.
3. Input Line Voltage is low
a. Check and connect to proper input power line.
4. Faulty Temperature Sensor / Switch
CAUTION
Turn off input power for the following tests.
a. Check IGBT Heatsink Temp Sensor (TS1). Dis-
connect wire connector P2 from terminal J2 on
Main PC Board. Check connector pins 1 and 2
for 10k ohm (± 25%) (at ambient temperature). If
resistance is not 10K ohm (±25%), replace TS1.
b. Check Inductor Temp Switch (TS2). Disconnect
wire connector P23 from terminal J23 on Main
PC Board. Check connector pins 1 and 2 for at
least 12K ohms. If resistance is less than 12K
ohms, replace output inductor (L1). If temp
switch is open, replace Main PC Board.
5. Faulty Logic PC Board
a. Check for (±) 12 vdc on Logic PC Board between
J1-9 and TP1. If (±) 0 vdc is present, replace
Logic PC Board.
6. Faulty Main PC Board
a. Check for (±) 0 vdc on Main PC Board between
J41-9 and TP1. If (±) 0 vdc is present, replace
Main PC Board.
7. Faulty Fan
a. Measure for (±) 230VAC on Main PC Board from
J26-1 to J26-4.
• If voltage is correct, replace fan (M1).