Hypertherm HT4400 HySpeed Plasma Arc Cutting System - Manual (Page 87)

OPERATION
4-28 HT4400 Instruction Manual
Hypertherm
027347 Tool
358-04-rplcwtrtb
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Replace Torch Water Tube
Below are some problems and causes that you may find with a defective or improperly installed water tube.
Problem Cause
S hort electrode life Water tube not screwed in tightly
F low switch interlock shutting Coolant flow restricted because
d own the system water tube is loose
H umming or rattling sound Water tube bent or loose
coming from the torch
Turn OFF all power to the HT4400 system.
Remove consumables from torch.
Do not over-tighten parts! Only tighten until mating parts are seated.
WARNING
The HT4400 power supply is designed to go into an idle mode if the retaining cap is removed.
However, DO NOT REMOVE CONSUMABLE PARTS WHILE IN THE IDLE MODE! Always
disconnect power to the power supply before removing torch consumable parts.
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