ESAB M3 plasma EPP-202 Mode D'emploi page 49

18 Output voltage fell below 70 volts
during cutting or below 40 volts during
marking.
20 Output or Arc voltage detected before
START signal issued
21 Main contactor failed to engage or
disengage.
22 Work current is greater than Electrode
current plus threshold limit during
cutting.
23 The power supply enable signal is
missing.
24 There was an SPI communication error
between the main and servo micro on
control board.
25 The EEPROM on the control has failed.
27 The servo and supervisor on the control
board of the power supply has firmware
version mismatch.
28 Jumper in the RAS box is missing.
30 The servo on the control board has
fault.
31 Coolant flow is below 0.45GPM.
32 Coolant flow is above 2.4GPM.
33 There was a watchdog error on the
CAN bus.
34 Ignition/Arc lost in dwell state immedi-
ately after it attached to the plate.
35 The station constant's CRC received
from the controller did not match the
calculated CRC.
39 Hall Sensor Connector is removed or
jumper is missing.
TROUBLESHOOTING
1. Check for short in the torch cable.
2. Check cutting or marking height is too low.
3. Check for short between electrode and nozzle.
4. Check for short between Work (+) and Electrode (-) terminals on the power supply.
5. Check for coiled or looped up electrode or work cables.
1. Check for a shorted IGBT.
2. Check the gate pulse voltage to IGBT from driver board. If there is a positive voltage during idle, replace the driver
board.
3. Check the IGBT gate pulse voltage connections and make sure they are as per schematics.
4. Check the arc voltage feedback connections on the driver board.
5. Check for shorted diode (D9).
6. Check the multi-color ribbon cable connection between J12 on PCB1 and J2 on PCB2.
1. Check the input fuses inside the disconnect box.
2. Check the main contactor (K1) contacts.
3. Check the main transformer auxiliary windings connection on TB2 for 115VAC.
4. Check the relay RB1-2 on the relay module RB1.
5. Check the ribbon cable connection between J6 and relay module RB1.
1. Check the feedback from the hall sensors.
2. Check the connection from hall sensors to the control board.
3. Replace the control board.
1. Check the power supply enable signal is present. This should be a dry contact output from the CNC.
2. Check for the power supply enable signal going to J1 connector on PCB1.
3. Check the enable signal contacts on K4 relay.
4. Check control transformer 24VAC voltage on TB3 powering K4 and K5.
5. Replace the control board.
1. Shut off the power supply for at least 5 minutes. If the error clears, check the grounding of the machine and the power
supply.
2. Replace the control board.
1. Shut off the power supply for at least 5 minutes. If the error clears, check the grounding of the machine and the power
supply.
2. Replace the control board.
Replace the control board.
1. Check the jumper inside the RAS box between pins L and J on the 14-pin Amphenol connector.
2. Check for damaged control cable.
3. Replace the control board.
1. Check for bad hall sensor.
2. Check for diode (D9) connection on the IGBT module bus bars.
3. Shut off the power supply for at least 5 minutes. If the error clears, check the grounding of the machine and the power
supply.
4. Replace the control board.
1. Check the coolant level.
2. Check for a clogged filter.
3. Check for leaks in the coolant return line.
4. Check the bypass regulator for bypassing too much coolant.
5. Check input power to the pump.
6. Check for proper pump function by looking for flow into the tank. If there is no flow and the motor in running, replace
the pump head.
7. Check the connection of the flow sensor to the control board.
8. Check for the SW6 position set properly according the flow sensor either turbine flow or rotor flow sensor.
9. Replace the control board.
1. Check the connection of the flow sensor to the control board.
2. Check for the SW6 position set properly according the flow sensor either turbine flow or rotor flow sensor.
3. Replace the control board.
1. Check the CAN connection between the interface control and the power supply's control board.
2. Check the input power to the interface control.
3. Check for all the dip switches on the IC board are toward the display.
4. Check for SW5 on the control board in the power supply is set to "CLOSE".
5. Check for coiling of the CAN cable near power leads.
1. Check that the piercing distance of the torch is at the recommended level.
2. Check that the ignition distance of the torch is at the recommended level.
3. Check the consumables.
This will normally correct itself, if not replace the control board.
1. Check the hall sensor feedback connector for proper wiring.
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