Thermal Dynamics PAK Master 150XL, Руководство по обслуживанию

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Manual 0-2728 4-9 SERVICE TROUBLESHOOTING
3. Low or No Coolant Flow
a. Check for proper coolant level. If low, fill to
correct level.
b. Check pump for proper operation (running)
and replace pump if necessary.
4. Clogged coolant filter and/or in-line coolant filter
a. Check internal and external coolant filters.
Clean or replace if necessary. Flush the old cool-
ant from the system.
5. Clogged torch leads
a. Check torch and leads and replace if necessary.
Flush the old coolant from the system.
6. Faulty Flow Switch (FS1) or Logic PC Board
a. Check the coolant flow switch and Logic Board
as follows:
The flow switch (FS1) for the coolant is cali-
brated for 0.25 gpm. When adequate coolant
flow satisfies FS1, it closes, connecting J99-1
on the Logic PC Board to J99-3 (common).
Measure voltage between J99-pin 1 and J99-
pin 3. If J99-1 is greater than 2 volts, FS1 or
connections to FS1 are faulty. If the voltage is
less than 2 vdc, the Logic Board may be faulty.
Replace the flow switch or Logic Board as nec-
essary.
G. AC Indicator ON; GAS Indicator ON; gas flows
continually
1. RUN/SET Switch in the SET position.
a. Place Switch in RUN position.
2. Faulty Gas Solenoid(s) or Logic PC Board
a. Turn the ON/OFF Switch to the OFF position.
• If the gas continues to flow, check air fil-
ters or replace Solenoid(s).
• If the gas flow stops, replace the Logic PC
Board.
H. AC indicator ON; Gas flows; GAS and DC indica-
tors ON; Arc in torch without pressing torch
switch; D26 (Torch Switch Enable) on Logic PCB
ON
1. Faulty Torch Switch
a. Refer to Torch Instruction Manual and check
continuity.
2. Faulty Torch Leads
a. Disconnect the Torch Control Cable from the
J22 connector.
b. If D26 on Logic PCB goes out, replace control
cable in leads package (per Torch Manual).
3. Faulty Pilot Output Board
a. Turn off unit.
b. Disconnect J12 and J13 from Pilot Output PC
Board, then check continuity at J12 pin 1 and
pin 3 on the Pilot Output Board. If shorted,
replace Output PCB.
4. Faulty Logic Board
a. Disconnect J5 connector from Logic PC Board.
• If D26 stays on, replace Logic PCB.
• If D26 goes out, check wiring to J5 connec-
tor from Pilot PC Board.
4.08 Pilot Arc Problems
NOTE
Refer to the Appendix Pages for PC Board Lay-
outs.
Locate your symptom below:
A. AC Indicator ON; gas flows; GAS Indicator ON
when torch switch is closed; DC Indicator OFF or
flashes once. No spark or momentary spark at
torch.
Measure for 320 vdc at Input PC Board between terminal
E8 wire #8 to E3 wire #9. If voltage is present, go to #4,
Faulty Logic or Gate PC Board.
1. Faulty Input "W" Contactor.
a. If Input "W" Contactor is not closing then mea-
sure the coil for 120VAC between wires #55 &
#59.
• If voltage is not present, go to the next step.
• If voltage is okay, then replace Input "W"
Contactor.