Hypertherm XPR170 - Page 293

Diagnostics and Troubleshooting
8
XPR170 Instruction Manual 810060 293
745
Error
Low Speed-
MagFan 2
The fan tachometer feedback
is below the minimum.
Code 745 initiates the End of
Cycle State because in the
XPR170 there are fewer
thermistors and different
magnetics behind MagFan 2.
1. Use the remote on-off switch to turn OFF and
then turn ON the cutting system.
2. Send a process ID to the XPR cutting system
and apply the Start command. This will cause
the torch to fire in the air.
3. Examine the fan. Make sure that the fan motor is
ON and the blades are rotating.
4. If the motor is ON and the blades are rotating
during a 745 code, the fan tachometer could be
bad. Fan replacement is necessary for a bad
tachometer. While waiting for a MagFan 2
replacement, you can temporarily exchange the
defective fan with the MagFan 1. Do not
operate the cutting system without a
functioning magnetics fan.
5. If the MagFan 2 is not rotating, make sure that
the following fan connections are good and
tighten loose connections if found:
• The fan connector
• The wiring to J2 and J5 on the fan power
distribution board
• The wiring to J7 on the control PCB 1
6. Examine the 48 VDC power source output. If
not correct, replace the 48 VDC power source.
7. If you do not find any loose connections and the
48 VDC power source is good, replace the fan.
End of cycle Set process;
remote on-off
Diagnostic code
number and
category
Diagnostic code
name
Description Corrective action XPR action
Code cancels
with