Hypertherm Powermax45 Service Manual - Manual (Page 103)

TroubleshooTing and sysTem TesTs
powermax
45 Service Manual 5-27
Test 7 – torch cap sensor
Test the cap-sensor switch and torch leads.
1. Set the ON/OFF switch to OFF (O).
2. Measure the resistance between pins 1 and 2 of J10 on the power board. It should measure less than 10 Ω. If it
reads as open, the cap-sensor switch circuit is not satisfied.
3. If the torch plunger moves smoothly and the consumables are correctly installed, then either the cap-sensor switch
is faulty or the torch lead has a broken wire. Replace the faulty part.
Test 8 – fan
Test the fan for proper operation.
• Place a jumper from pin 1 of J3 to pin 1 of J4 on 200–240 V CSA power supplies and 230 V CE power supplies
or from pin 1 of J4 to pin 1 of J5 on 400 V CE and 480 V CSA power supplies. If the fan does not operate,
replace the fan.
NOTE: Testing the fan can trigger a fault due to protection features on the fan driver chip. You can disregard
this fault if it occurs as a result of a fan test. The purpose of the fan test is to ensure the fan is operating
properly, not to test the fan drive circuit.
TP 19
W
- + - +
TP 18
R
TP 17
B
192 VDC 192 VDC
TP17
W
+ - + -
TP18
B
TP16
R
~280 VDC ~280 VDC
J3 and J4 J4 and J5
200–240 V CSA and 230 V CE
power supplies
400 V CE and 480 V CSA
power supplies
(Ferrite found on CE units only)