Theory of operation ....................................................................................................................................................................................5-2

General ..............................................................................................................................................................................................5-2

200-240 V CSA and 230 V CE 1-phase power supply functional description .............................................................5-2

400 V CE 3-phase power supply functional description .......................................................................................................5-2

480 V CSA 3-phase power supply functional description ...................................................................................................5-3

Sequence of operation ...................................................................................................................................................................5-4

Troubleshooting preparation ....................................................................................................................................................................5-5

Test equipment .................................................................................................................................................................................5-5

Troubleshooting procedures and sequence..............................................................................................................................5-5

External inspection ..........................................................................................................................................................................5-6

Internal inspection ...........................................................................................................................................................................5-6

Initial resistance check ..............................................................................................................................................................................5-7

200-240 V CSA and 230 V CE power supply overview ................................................................................................................5-8

400 V CE power supply overview .........................................................................................................................................................5-9

480 V CSA power supply overview ................................................................................................................................................... 5-10

Troubleshooting guide ........................................................................................................................................................................... 5-11

Control Board LEDs............................................................................................................................................................................... 5-16

Use the control board Error and Reset LEDs to troubleshoot .......................................................................................... 5-17

System tests............................................................................................................................................................................................. 5-18

Test 1 - voltage input .................................................................................................................................................................. 5-18

Test 2 - power board voltage checks ..................................................................................................................................... 5-19

Test 3 - VBUS and voltage balance ....................................................................................................................................... 5-20

Test 4 - solenoid valve ................................................................................................................................................................ 5-24

Test 5 - torch stuck open (TSO) or torch stuck closed (TSC) ......................................................................................... 5-25

Test 6 - plasma start ................................................................................................................................................................... 5-26

Test 7 - torch cap sensor ........................................................................................................................................................... 5-27

Test 8 - fan .................................................................................................................................................................................... 5-27

Test 9 - pressure transducer ..................................................................................................................................................... 5-28

Test 10 - power switch trip coil ................................................................................................................................................ 5-28

powermax

45 Service Manual