Diagnostics and Troubleshooting
300 810060 Instruction Manual XPR170
778
Alert
This code occurs
only with cutting
systems that have
firmware at Rev J
or earlier
Hv relay fault The high-voltage relay driver
detects an over current
condition.
1. Remove the power for the XPR cutting system.
2. Remove the top and side panels from the torch
connect console.
3. Examine the ohmic PCB inside the torch
connect console.
4. Remove J2 from the ohmic PCB.
5. Use an ohmmeter and needle probes to
measure the coil resistance across the 2
sockets (J2, 2 female connector). You can
expect a resistance of approximately 126 ohms.
6. If the ohms value is more than 10% above or
below 126 ohms, replace the ohmic relay
(Hv relay).
7. If the ohms value is within acceptable range,
make sure that you have the most recent XPR
firmware. Log into the Xnet at
www.hypertherm.com to download it.
None Set process;
remote on-off
779
Alert
Ch1 15V bus The Chopper 1 15 V bus is
out of range (below 13 V or
above 17 V).
1. Examine the 24 VDC on the connector J2,
pins 1 and 2 on the Chopper 1 assembly.
2. If the 24 VDC is absent, examine the wiring on
J2 of Chopper 1. Look for loose connections.
3. If you measure 24 VDC, replace the Chopper 1
assembly.
None Set process;
remote on-off
Diagnostic code
number and
category
Diagnostic code
name
Description Corrective action XPR action
Code cancels
with
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