Hypertherm HT4001 Plasma Arc Cutting System - Manual (Page 142)

MAINTENANCE
6-16
HT4001
Instruction Manual
7. No injection water flow. 7.1. Water supply is turned off.
Turn water supply ON.
7.2. Water chiller is turned off.
Turn water chiller ON.
7.3. Leak(s) in water hose(s).
Check for and repair/replace leaking hose(s).
7.4. Injection water metering valve MV4 is closed.
Open valve. See page 5-5 for location of MV4.
7.5. Solenoid valve SV6 not functioning or not getting signal to open
from relay board.
Use system wiring diagrams and relay board status indicators in
Test Preflow mode later in this section to troubleshoot.
8. No gas flow. See problem 5.
Problem Possible Causes and Solutions
9.1. Hosing from supply is pinched.
Check and repair any kinks in hosing line.
9.2. Leak in gas hose.
Check for and repair/replace leaking hose.
9.3. Supply hose inner diameter is too small.
Use larger diameter hose.
9.4. MV1 in Motor Valve Console not being activated or not
functioning.
Check wiring from S3 on Gas Console to MV1 in Motor Valve
Console. If wiring is OK, check for 120VAC when activating
switch. If there is no 120VAC, check voltage/wiring from S3 to
power distribution board (PCB1). Repair and/or replace defective
component(s).
9. Cannot adjust gas to proper
level.
10. No injection water flow. See problem 7.
Select Test Cut flow
(with S2 on Gas Console)