Hypertherm HT2000, Instruction Manual

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MAINTENANCE
8-16 HySpeed HT2000
Instruction Manual
19
Problem Possible Causes
/ Solutions
3. COOLANT LEVEL LED
illuminated:
3.1. Coolant level is low.
This LED will extinguish when a proper coolant level in the
coolant reservoir is maintained. Level switch LS1 is located
in the coolant reservoir, and will open when it senses that
coolant level is too low.
• Check coolant level.
• If coolant level is adequate, check to see if LS1 switch is
closed.
• Check connections and associated wiring from LS1 to
PCB1.
Repair and/or replace defective component(s), if necessary.
4. SHIELD GAS/CAP LED
illuminated:
4.1. Shield gas pressure too low.
This LED will extinguish when shield gas pressure of 12 psi
(0.83 bar) or greater is sensed by PS3 (located in the RHF
console).
• Check to see that shield gas supply is set according to the
Cut Charts
in this manual.
• Verify that all shield gas connections are secure, and that
there are no leaks in any hoses connected to the RHF
console or gas console.
4.2. Torch cap not tightened securely.
If the torch retaining cap is not tightened securely, or there
is debris in the retaining cap, shield gas may escape and
cause pressure switch PS3 to remain open.
• Listen at the torch for a hissing sound during startup.
• Remove retaining cap and check for debris or O-ring
damage. Clean or replace, if necessary. See
Changing
Consumable Parts
in the
Operation
section.
4.3
.
Pressure switch PS3 in RHF console not functioning.
PS3 is normally open, and closes when shield gas pressure
is 12 psi (0.83 bar) or greater.