Thermal Dynamics CUTMASTER 39, Руководство по обслуживанию

Страница: 52 / 80

cutmaster 39
SERVICE 5-8 Manual 0-4976
D. AC indicator flashing, TEMP indicator OFF
(on system start-up); RUN / SET switch in
RUN position
1. Torch shield cup loose
a. Shut power supply off. Tighten shield
cup securely. Turn unit back on.
2. Torch connection at power supply loose.
a. Shut power supply off. Tighten torch
leads male connector into female recep-
tacle on power supply securely. Turn
power supply back on.
3. Faulty PIP switch or open PIP wires in
torch leads
a. Check torch PIP switch for continuity.
b. Check torch PIP leads for continuity.
4. J3 wire connector disconnected from PC
board.
a. Check J3 connector; reconnect if neces-
sary.
E. Gas flows continuously; AC indicator ON;
TEMP indicator OFF; DC indicator OFF;
GAS indicator ON
1. RUN /SET Switch in SET (down) position
a. Change to RUN (up) position.
2. Faulty RUN / SET switch
a. Disconnect primary input power. Dis-
connect wires from RUN / SET switch.
Put switch in RUN (up) position.
Check switch for open condition. If
switch is shorted, replace switch.
F. AC indicator flashing (on start-up); TEMP
indicator OFF; RUN / SET switch in RUN
position; gas flows from torch
1. Torch switch stuck ON or torch switch
wires shorted
a. Check indicator D22 on PC board.
Indicator should be OFF unless torch
switch is closed.
b. Check torch switch for proper opera-
tion.
c. Check torch switch for coninuity.
G. AC indicator flashing (on start-up); TEMP
indicator OFF, RUN / SET switch in RUN
position,
1. Torch tip, starter cartridge, or electrode
missing or badly worn.
a. Check torch parts; replace as needed.
2. Dirty or defective starter cartridge
a. Check starter cartridge; clean or replace
as needed.
3. Wire E8 not connected to PC Board termi-
nal E8
a. Check connection; reconnect if neces-
sary.
4. PC board fault circuit defective
a. Replace PC board
H. AC indicator flashes; Temp indicator
steady ON
1. Fan wire harness disconnected from termi-
nal J4 on PC board.
a. Check fan wire harness; reconnect if
necessary
2. Faulty fan or fan wire harness
a. Check fan and harness; replace as
needed.
I. AC indicator flashes; TEMP indicator
blinks slowly; RUN/SET switch in SET
position
1. Fan is blocked
a. Check fan blades; clear as needed.
2. Faulty PC Board
a. Replace PC Board
J. No gas flow; AC indicator ON; TEMP
indicator OFF; DC indicator OFF; Gas
indicator ON; RUN/SET switch in SET
position
1. Inlet gas pressure too high (over 120 psi /
8.3 bar)
a. Set inlet gas pressure below 120 psi /
8.3 bar
2. Faulty RUN/SET switch
a. Disconnect wires from RUN/SET
switch. Test switch for continuity in
SET position. If no continuity in SET
position, replace switch.
3. Faulty gas solenoid or solenoid wire har-
ness.
a. Disconnect solenoid wire harness
from terminal J1 on PC board. Test
resistance in wire harness. Resistance
should be 20 ohm ± 5 ohm. If resis-
tance is not correct, replace solenoid
assembly.