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TroubleshooTing and sysTem TesTs

powermax

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

TP 18

TP 17

192 VDC

TP17

TP18

TP16

~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)

Hypertherm powermax45 Service Manual

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