MAINTENANCE
HPR400XD Manual Gas Instruction Manual 5-23
Error code
number
Name Description Corrective action
155
Chopper 4
overcurrent
Chopper 4 current
feedback has exceeded
160 amps.
1. Verify that the wiring between CS4 and PCB3 is correct
and not damaged.
2. Measure voltage across current sensor.
a) Red to black = +15 VDC, Green to black = -15 VDC,
white to black = 0 VDC at idle and varies with current
output (4 VDC = 100 amps).
b) If possible, take a voltage reading on current sensor
while trying to cut. Ratio is 4 VDC = 100 amps.
c) If the current sensor voltage is approximately 6.4 VDC or
greater at idle, replace the current sensor.
3. Remove connector JD.1 from the chopper and verify that
LED1 is extinguished.
a) If LED1 is extinguished with the connector removed, then
reconnect JD.1 and try to fire the torch. If the chopper
still goes into overcurrent, replace the chopper.
b) If the chopper does not go into overcurrent, replace
PCB3.
156
Chopper 2
current at
power-up
Chopper 2 current signal
is active at power-up
See wiring diagrams in section 7
1. Verify that the voltage at CS2 is correct.
2. Verify that the wiring between CS2 and PCB3 is correct
and not damaged.
3. Swap CS2 with CS3. If the error code changes to 157,
replace the original CS2.
157
Chopper 3
current at
power-up
Chopper 3 current signal
is active at power-up
See wiring diagrams in section 7
1. Verify that the voltage at CS3 is correct.
2. Verify that the wiring between CS3 and PCB3 is correct
and not damaged.
3. Swap CS3 with CS2. If the error code changes to 156,
replace the original CS3.
158
Chopper 4
current at
power-up
Chopper 4 current signal
is active at power-up
See wiring diagrams in section 7
1. Verify that the voltage at CS4 is correct.
2. Verify that the wiring between CS4 and PCB3 is correct
and not damaged.
3. Swap CS4 with CS2. If the error code changes to 156,
replace the original CS4.
Error code troubleshooting – 14 of 16
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