Hypertherm Powermax350 Service Manual - Manual (Page 34)

Service Manual 3-10
M
AINTENANCE
Problem Cause/Solution
3. No cutting output; POWER ON and READY LEDs
illuminated; PRESSURE, TORCH CAP and OVER-
TEMP LEDs extinguished; fan operating.
4. No cutting output; POWER ON LED illuminated;
READY, PRESSURE, TORCH CAP and OVER-TEMP
LEDs extinguished; fan operating.
5. No control of cutting output.
2.5 Check resistance and connections of input
resistor R2 which is rated at 10 ohms
±
10 %.
Replace if necessary.
2.6 Check coil voltage and connections of control
relay CR6. Check continuity of coil and condition
of contacts. Replace if necessary.
2.7 Check transformer T1 for signs of winding failure.
Check continuity across windings and check
connections. Check secondary voltages. Replace
if necessary.
3.1 Check that the work clamp is connected.
3.2 Clean or replace worn consumables as
necessary.
3.3 Check resistance and connections of input
resistor R2 which is rated at 10 ohms
±
10 %.
Replace if necessary.
3.4 Check coil voltage and connections of contactor
control relay CR7. Check continuity of coil and
condition of contacts. Replace if necessary.
3.5 Check coil voltage and connections of control
relay CR6. Check continuity of coil and condition
of contacts. Replace if necessary.
3.6 Check coil voltage and connections of gas valve
GS1. Check continuity of coil. Replace if
necessary.
3.7 Check power control board PC1 and connections.
Replace if necessary.
3.8 Check safety control board PC2 and connections.
Replace if necessary.
4.1 Reset power switch S1.
4.2 Check safety control board PC2 and connections.
Replace if necessary.
5.1 115/230 Volt units: Check position of input voltage
selector switch S2.
5.2 Check power control board PC1 and connections.
Replace if necessary.
5.3 Check safety control board PC2 and connections.
Replace if necessary.
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