SECTION 5
TROUBLESHOOTING
Jan 2001
Page 5-2
05114608
Red Flashing Light, Message On Operator’s Console
Condition and Possible Causes Corrective Action
LEAK Check for HP piping leaks
Check for HP seal leak
Check for HP check valve leaks
Check for HP valve leaks
Check for sufficient water supply
Check for dump valve closure or seal leakage.
Check orifices condition, and proper diameters.
OIL TEMP Verify hydraulic oil tank temperature is above
62
0
C (144
0
F). Check cooling water flow to heat
exchanger. Adjust water modulating valve.
OIL LEVEL Check hydraulic oil level on the reservoir sight
glass. Check for and correct hydraulic oil leak,
add oil to tank.
BOOSTER PUMP Check booster pump temperature if above 53
0
C
(128
0
F).
Check cutting flow to/from booster pump.
Check water bypass orifice. Excessive time in
deadheaded condition.
HP Water Signal Abnormal Fluctuation
Orifice Large/ Worn/
Damaged
Check that orifices do not exceed capacity of
pump.
Check that orifices are in good working order.
Verify that stone is not missing.
Check Piping Leaks Check system components for leaks including
dump valve condition.
Check Valve Leakage Inspect pump discharge HP check valves.
Inspect pump inlet low pressure (LP) check
valves.
Check Seal Leakage Inspect plunger, sealing head seals.
Hydraulic Control
Malfunction
Check hydraulic valves operation.
Verify proper shifting of 4-way reversing valve.
Verify proper proximity switch operation.
Hot Surfaces On HP Cylinder Components
HP Discharge Check
Leaking
Inspect check valve seat, poppet, spring, and
guide condition.
LP Inlet Check Valve
Leaking
Inspect check valve poppet, spring, seat, and
sealing head.
Sealing Head or Plunger Check plunger and sealing head seal leak and
repair.
Inspect seal head body for crack in the bottom of
the inlet water groove.
Damaged HP Cylinder Check cylinder inside diameter for damage.
Polish if required.
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