Powermax125
Service Manual 808070
121
8 – Troubleshooting and System Tests
IGBT device test using the Hypertherm tester
Using the Hypertherm IGBT tester, press and hold the switch in the desired position to perform each test described in
the following table.
Troubleshoot the Hypertherm IGBT tester
1.
Inspect the leads and the IGBT tester for damage.
2.
Verify that the battery voltage is greater than 8 V.
3.
Test the IGBT Tester itself as shown in the following table. If the results do not match the table, replace the lead
connections.
Switch
Position
LED
This may mean
Corrective action
Fail
Pass
Battery
Left
X
-
-
IGBT is short-circuited
Replace IGBT
Left
-
X
-
IGBT passed the short-circuit test None
Left
-
-
X
Battery below 8 V
Replace battery
Left
-
-
-
Dead battery
Replace battery
Right
X
-
-
IGBT is open
Replace IGBT
Right
-
X
-
IGBT passed the open test
None
Right
-
-
X
Battery below 8 V
Replace battery
Right
-
-
-
Dead battery
Replace battery
Connect leads
Short test
Open test
None
Pass
Fail
Red to Black
Fail
Pass