Thermal Dynamics CUTMASTER 39, Руководство по обслуживанию

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cutmaster 39
Manual 0-4976 5-9 SERVICE
4. Faulty PC board
a. Leave RUN/SET switch in SET posi-
tion. Disconnect 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.
K. AC indicator steady ON: TEMP indicator
ON; RUN/SET switch in SET position
1. PC board temperature sensor disconnected
or faulty.
a. Check wire harness connection at
terminal J5 on PC board. Reconnect if
necessary.
b. Disconnect PC board temperature sen-
sor wire harness from J5 on PC board.
Install a temporary jumper across the
pins on PC board terminal J5. Check
temperature indicator on Power Supply
front panel. If TEMP indicator is OFF,
replace PC board.
L. No gas flow; AC indicator ON; GAS
indicator OFF; TEMP indicator OFF; DC
indicator OFF; RUN/SET switch in SET
position
1. Gas supply not connected to unit
a. Connect gas supply.
2. Gas supply not turned on
a. Turn gas supply on.
3. Gas pressure too low
a. Shut power supply off. Set gas pressure
on the power supply gas regulator to 65
psi / 4.5 bar. turn power supply back
on.
4. Faulty PC board
a. Disconnect pressure switch wire har-
ness from terminal J9 on PC board.
Test for continuity between sockets 2
and 3 on the wire harness connector. If
gas pressure is above 65 psi / 4.5 bar
and there is continuity between sockets
2 and 3, replace PC board.
5.05 Pilot Arc Problems
Locate your symptom below:
A. No pilot arc; Gas flows continuously; AC
indicator ON; TEMP indicator OFF; GAS
indicator ON; DC indicator OFF
1. Shorted Torch
a. Test torch and leads for continuity.
2. Faulty PC Board
a. Replace PC Board.
B. No arc or intermittent arc in torch; Gas
flows; AC indicator ON; TEMP indicator
OFF; GAS and DC indicators ON
1. Gas pressure set incorrectly (too high)
a. Set gas pressure on the Power Supply
gas regulator to 65 psi / 4.5 bar.
2. Oil/moisture in air lines
a. Purge system. If problem is corrected,
add filters in line with air source.
3. Torch consumable parts incorrect or worn
a. Refer to Operator’s Manual.
4. Starter cartridge missing from torch
a. Shut off power. Remove shield cup
from torch. Install starter cartridge if
missing.
5. Faulty leads
a. Check continuity.
6. Faulty torch
a. Check continuity.
7. Faulty PC Board
a. Replace PC Board.
C. No pilot arc; GAS and DC indicators blink
1. Gas pressure is too low.
a. Set gas pressure to 65 psi / 4.5 bar.