Hypertherm HD3070 Plasma Arc Cutting System w/ Automatic Gas Console - Manual (Page 142)

HD3070 with Automatic Gas Console Instruction Manual 5-17
16
MAINTENANCE
Problem Possible Causes / Solutions
5. GAS PRESSURE LED
extinguished:
5.1. Plasma or shield input gas pressure too low.
This LED will illuminate if the plasma and shield input gas
pressures are above 105 psi (7.2 bar).
• Check that input plasma and shield gas pressures are
120 psi (8.2 bar).).
6. COOLANT TEMP LED
extinguished:
6.1. Coolant too hot.
This LED will illuminate when temperature switch TS2 senses
that the temperature of coolant in the coolant reservoir is
under 160°F.
• Check to see if water coolant is above 160°F. If the
temperature is 160°F or above, the LED will be extinguished
– wait for the system to cool.
• Disconnect PL24 (located in the rear of the power supply
near the coolant reservoir) from REC24 and check to see if
TS2 is open. TS2 is normally closed, and is opened when a
temperature above 160°F is reached.
• Using the applicable wiring diagram (in back of this manual),
check pins, wires and connections from PL24 to REC3 of
1XPCB2.
• Check for proper operation of cooling fans. Ensure that the
heat exchanger air flow is not obstructed.
Repair and/or replace defective component(s), if necessary.
RHF INTERLOCK
OVER TEMP
EXT INTERLOCK
GAS SYSTEM
GAS PRESSURE
COOLANT TEMP
COOLANT FLOW
STATUS
3070STAT.05
RHF INTERLOCK
OVER TEMP
EXT INTERLOCK
GAS SYSTEM
GAS PRESSURE
COOLANT TEMP
COOLANT FLOW
STATUS
3070STAT.06