Powermax125
Service Manual 808070
149
8 – Troubleshooting and System Tests
System tests
Before performing any tests, complete the
on page 115 and the resistance check in
on page 152. These tests should only be performed by a qualified service technician. Wear the proper
personal protective equipment and use approved tools and measurement equipment.
Before purchasing a major replacement component, verify the problem with Hypertherm Technical Service or the nearest
Hypertherm repair facility.
Several connectors require you to remove a white cap to access the test points.
shows examples of
connectors located at the top of the power board. You can pry off most covers with your thumbnail. However, you may
need to use a small blade screwdriver to carefully pry off some of the covers. Be careful not to bend or break the
connectors.
Figure 19
Test number
Description
Associated fault codes
1
Voltage input
0-60-ALL
2
DC power buss
3-43-0
3
Output diode bridge
General
4
Temperature out of range
0-40-ALL, 2-10-ALL
5
Flyback (DC to DC) circuit
3-00-0, 3-42-ALL, 3-43-ALL
6
Torch stuck open/closed
0-30-ALL
7
Start signal
General, 0-51-0
8
Torch cap-sensor switch
0-50-0
9
Electronic regulator
0-21-0, 3-20-ALL
10
Pressure sensor
0-12-0, 0-20-0, 2-11-ALL
11
Fan
3-10-ALL
12
Power switch auxiliary
Unreported interlock at START
1
2
3
4
5
1
Electronic regulator (J6)
2
Pressure switch/auxiliary contactor (J5)
3
Pressure sensor (J3)
4
Inverter temperature sensor (J2)
5
Fan (J1)