Maintenance and Troubleshooting SR-45i User’s Manual
Logic-Regulator Status LED’s
If a problem occurs with the SR-45i system, check all of the primary disconnect
fuses before proceeding. Also, check fuses F1, F2, and F3 in the power supply.
Be sure to check all fuses with an ohmmeter and replace any bad fuses.
The logic-regulator p.c. board controls all of the functions of the SR-45i system.
It has 10 LED’s which aid in troubleshooting the system. The LED’s illuminate
when a particular event occurs. Illuminated LED’s indicate the following:
LED
Indication
L1
Torch interlock pressure switch PRS2 closed
L2 STRT
Plasma start signal applied
L3 CON
Main contactor CON2 energized
L4 REG
Chopper
energized
L5 H.F.
High frequency transformer energized
L6 PAR
Pilot arc relay energized
L7 GAS
Gas solenoid valve energized
L8 MOT
X/Y machine motion relay energized
L9 PCB
Indicates p.c. board power
L10 TAC
Transferred arc current established from torch to workpiece
Logic-Regulator Sequence of Operation
The following LED’s should illuminate after primary power is applied:
•
L9 PCB
The following LED’s should illuminate in sequence after a start signal is
received:
•
L2 STRT
•
L7 GAS
•
L1
•
L3 CON
•
L6 PAR
•
L4 REG
•
L5 H.F.
•
L10 TAC
•
L8 MOT
After a transferred cutting arc is established, the following LED’s will go
out:
•
L5 H.F.
•
L6 PAR (L6 will remain illuminated in modes 5 and 9)
5-7
Содержание SR-45i
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