Hypertherm Powermax105 Service Manual - Manual (Page 189)

TroubleshooTing and sysTem TesTs
powermax
105 Service Manual 8-51
Remove the connector covers to access the pins on the top-rear of the power board.
If the +48 VDC value is incorrect:
• Remove the fan connector (J1) and repeat the test.
• If the value is now correct, replace the fan.
• If the value is still incorrect, replace the power board.
If the +24 VDC value is incorrect:
• Remove the pressure switch connector (J5) and repeat the test.
• If the value is now correct, replace the pressure switch.
• If the value is still incorrect, replace the pressure switch connector, remove the solenoid valve connector (J6)
and repeat the test. If the value is now correct, replace the solenoid valve. If the value is still incorrect, replace
the power board.
If the +5 VDC value is incorrect:
• Remove the pressure sensor connector (J3) and repeat the test.
• If the value is now correct, replace the pressure sensor.
• If the value is still incorrect, remove the DSP board and repeat the test.
• If the value is now correct, replace the DSP board.
• If the value is still incorrect, replace the power board.
If the +3.3 VDC value is incorrect:
• Remove the DSP board.
• If the value is still incorrect, replace the power board.
Otherwise, the DSP board or control board may be bad. Do the following:
- Re-install the DSP board with the ribbon cable disconnected. If the value is now correct, replace the
control board. Otherwise, replace the DSP board.
Electronic
regulator J6
Pressure sensor J3 Pressure switch/auxiliary
contactor J5
Inverter temperature
sensor J2
Fan J1