Hypertherm HT200LHF-200 Volt HySpeed - Manual (Page 95)

MAINTENANCE
5-6 HySpeed HT2000LHF
Instruction Manual
6
Troubleshooting
The troubleshooting section is presented by following normal operational sequence.
Before troubleshooting for specific problems, be sure that the 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
listed at the front of this manual.
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 POWER ON (I) PB1 pushbutton is defective.
Check that the switch is operating correctly. The POWER
ON switch is normally open.
1.2. The POWER OFF (0) PB2 pushbutton is defective.
Check that the switch is operating correctly. The POWER
OFF switch is normally closed.
1.3. No jumper for PB2A and PB2B at TB5.
TB5 terminals 1&2 and 4&5 need a jumper if there is no
optional remote I/O cable for switching the power supply on
and off.
1.4. 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 PCB1 is defective.
Check that CR2 switches when the POWER ON pushbutton
is pressed. See Figure 5-3 for location of CR2. If CR2 is
defective, replace PCB1.
2.2. Connector from the power distribution board is not seated
securely.
Check pins, connectors and associated wiring for continuity.
Repair or replace, if necessary.
3. The green POWER ON pushbutton
switch PB1 is pressed, the fans are
operating, but the green POWER
ON indicator does not illuminate.
3.1. Pushbutton PB1 was not held down for a long enough
period of time.
Press and hold PB1 for a minimum of 5 seconds.
3.2. Relay CR1 on the power distribution board is defective.
Check that CR1 switches when the POWER ON pushbutton
is pressed. See Figure 5-3 for location of CR1. If CR1 is
defective, replace PCB1.
Problem Possible Causes
/ Solutions