7
4.1 OPeRATION
4.2 PCM-1125 CONTROlS (FIguRe 4-1)
A. Power Switch (located on rear panel). When placed in ON position, the green pilot light will glow indicating control
circuit is energized and the cooling fan will run.
B.
Output Current Control. Adjustable from 10 to 70 amperes.
C.
Air Test Switch. When placed in Test position, air filter-regulator can be adjusted to desired pressure (65-75 psig)
before cutting operations. Allow air to flow for a few minutes. This should remove any condensation that may have ac-
cumulated during shutdown period. Be sure to place switch in OPERATE position before starting cutting operations.
D. Trigger lock Switch. When placed in LOCK position, this permits releasing torch switch button after cutting arc has
been initiated. To extinguish arc at end of cut, press and release torch switch button again or pull torch away from
work. When placed in UNLOCK position, torch switch must be held closed by the operator during the entire cutting
operation and then released at the end of cut.
e.
Fault light. Will glow amber under the following conditions and operations will come to a complete stop.
Flow Fault: The fault light will be mostly on but will flick off for about 1/10th of a second every second. This indicates
that the air flow supply is low.
Over Temperature: The fault light will be mostly off but will flick on for about 1/10th of a second every second. This
indicates that the duty cycle has been exceeded. Allow the power source to cool down before returning to operate.
High/low line Voltage: The fault light will rapidly blink on and off (five times per second). This indicates that the
input voltage is outside the “+ or -” 15% range of the input rating.
Over-Current: The fault light will be on continuously. This indicates that input current has been exceeded.
All fault signals will remain on for a minimum of 10 seconds. If fault clears, all will reset automatically except
for over-current. To clear over-current, the power must be shut off for 5 seconds and then turned back on.
SeCTION 4
OPeRATION
WARNINg
eleCTRIC SHOCK can kill.
• Do NOT operate the unit with the cover removed.
• Do NOT apply power to the unit while holding or carrying the unit.
• Do NOT touch any torch parts forward of the torch handle (nozzle, heat shield,
electrode, etc.) with power switch on.
WARNINg
ARC RAYS can burn eyes and skin; NOISe can damage hearing.
• Wear welding helmet with No. 6 or 7 lens shade.
• Wear eye, ear, and body protection.
CAuTION
Position the PCM-1125 at least 10 feet (3 meters) from the cutting area. Sparks
and hot slag from the cutting operation can damage the unit.
Summary of Contents for PCM-1125
Page 4: ... table of contents ...
Page 20: ...20 section 2 description ...
Page 26: ...26 section 3 installation ...
Page 30: ...30 section 4 operation ...
Page 44: ...44 section 5 maintenance ...
Page 56: ...56 notes ...
Page 57: ...57 notes ...
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