Hypertherm MAX200 Service Manual - Manual (Page 57)

3-16 MAX200 Service Manual
1-97
MAINTENANCE
Troubleshooting
The troubleshooting section is presented by following normal operational sequence.
Before troubleshooting for specific problems, be sure that unit passes Initial Checks as outlined earlier in this
section.
WARNING
SHOCK HAZARD: Always use caution when servicing a power supply when the covers are removed.
Dangerous voltages exist within the power supply which could cause injury or death. If questions or
problems arise during servicing, call the Hypertherm Technical Services Department at 1-800-643-0030.
Problem Possible Causes and Solutions
1. The green POWER ON
pushbutton switch PB1 is
pressed, but the fans are
not operating and the green
POWER ON indicator does
not illuminate. 1.1. The green POWER ON(I) PB1 pushbutton is defective.
Check that switch is operating correctly, and that good
contact is being made. The POWER ON switch is normally
open.
1.2. The red POWER OFF(O) PB2 pushbutton is defective.
Check that switch is operating correctly, and that good
contact is being made. The POWER OFF switch is normally
closed.
1.3. Associated wiring not making good contact.
Check wiring and repair or replace, if necessary.
2. The green POWER ON
pushbutton switch PB1 is
pressed, the POWER ON
indicator illuminates, but the
fans are not running. 2.1. CR2 on the Power Distribution Board is defective.
Check that CR2 switches when POWER ON pushbutton is
pressed. See Figure 3-2 for location of CR2. If CR2 is
defective, desolder CR2 and replace.
2.2. PL31 and REC31 located near the fans (see Figure 4-1 for
location of fans) are not seated together securely and/or not
getting 120VAC from Power Distribution Board.
• Check pins, connectors and associated wiring for good
continuity.
• Check for 120VAC at PL31.
2.3. PL2 and REC2 on Power Distribution Board (see Figure 3-2
for location of REC2) are not seated well.
Check pins, connectors and associated wiring for good
continuity. Repair or replace, if necessary.