Hypertherm MAX200 Service Manual - Manual (Page 67)

3-26 MAX200 Service Manual
1-97
MAINTENANCE
Problem Possible Causes and Solutions
10.4. Torch is getting insufficient current.
Check the arc current setting for the type and thickness of
metal you are cutting from the Cut Charts in the Operation
section of MAX200 Instruction Manual (#800870 or
#800980).
10.5. Torch Height Control receiving incorrect voltage for correct
standoff distance (for machine torches with THC).
• Check the arc voltage setting for the type and thickness of
metal you are cutting from the Cut Charts in the
Operation section of MAX200 Instruction Manual
(#800870 or #800980).
• Check cable from power supply to remote V/C control.
See Parts List section for information on the remote V/C
cables.
10.6. The power supply has overheated.
Shut down system and wait for unit to cool down. If unit
will not restart, see interlock troubleshooting guide earlier
in this section.
10.7. Transfer of arc is not sensed.
See Arc Transfer Test Procedure later in this section to
troubleshoot.
10.8. Choppers 1 and/or 2 defective or not functioning.
See Chopper Module Test Procedure later in this section
to troubleshoot.
11. No Initial Height Sensing
(machine-torch systems with
IHS option) 11.1. Torch lifter motor defective.
Replace torch lifter motor, if necessary.
11.2. THC board not being activated.
Check to see if D5 on PCB9 illuminates after the STATUS
indicators all extinguish. See Figure 3-15 for location of
D5. If D5 is notilluminated, then PCB9 may not be getting
120VAC from Power Distribution Board PCB6. Using 013-
2-179 wiring diagram, check pins, connectors and
associated wiring from REC5 of PCB9 to REC2 of PCB6.
Repair and/or replace defective component(s), if
necessary.