Hypertherm HD3070 Plasma Arc Cutting System w/ Automatic Gas Console - Manual (Page 140)

HD3070 with Automatic Gas Console Instruction Manual 5-15
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MAINTENANCE
Status LED Troubleshooting
Be certain that the power supply has been through the Initial Checks as outlined earlier in this section before
troubleshooting STATUS LEDs. When any one of the STATUS LEDs does not illuminate (except OVERTEMP
illuminates) there is a fault condition that must be corrected in order for the HD3070 power supply to become
operational. The LEDs are connected in series, so the upper-most LED that does not illuminate (except
OVERTEMP does not extinguish) represents the first condition that must be corrected. Refer to the problems and
probable causes and solutions and the troubleshooting flow diagrams below. See wiring diagrams and gas and
coolant system schematics at back of manual for reference.
LED illuminated
LED extinguished
Problem Possible Causes / Solutions
1. RHF INTERLOCK LED
extinguished:
1.1. Door to Remote HF console not completely shut.
This LED will illuminate when switch S1 located in the Remote
HF console is closed. If door is closed, check pins, connectors
and associated wiring for good continuity from receptacle 2X1
to 1X5.
Repair and/or replace defective component(s), if necessary.
2. OVERTEMP LED
illuminated:
2.1. Main Transformer T2 or chopper is overheating.
This LED will extinguish when the main transformer (T2) is
operating in a normal temperature range( (under 165° Ctr) and
the chopper is operating in the normal temperature range
(under 82° C). Temperature switch TS1 (transformer) or TSW1
(chopper) will open and will cause the LED to illuminate when
overheating occurs.
• Check temperature switches TS1 and TSW1 (normally
closed).
• Check pins, connectors and associated wiring to
temperature switches.
• Leave the fans running, and try restarting the unit after one
hour. If the LED still illuminates the transformer or chopper
may have to be replaced.
RHF INTERLOCK
OVER TEMP
EXT INTERLOCK
GAS SYSTEM
GAS PRESSURE
COOLANT TEMP
COOLANT FLOW
STATUS
3070STAT.01
RHF INTERLOCK
OVER TEMP
EXT INTERLOCK
GAS SYSTEM
GAS PRESSURE
COOLANT TEMP
COOLANT FLOW
STATUS
3070STAT.02