Maintenance – Hypertherm HD3070 Plasma Arc Cutting System w/ Automatic Gas Console User Manual

Page 142

HD3070 with Automatic Gas Console

Instruction Manual

5-17

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