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4-2
SECTION 4 – TROUBLESHOOTING GUIDE
Symptom
Pump operates, but
will not build
pressure.
Pump operates, but
will not build
pressure.
Large amounts of
water leak from the
pressure or
thermocouple ports in
the test cell when
fittings are removed.
Temperature will not
rise above ambient.
Possible Cause
CYLINDER WATER
valve is not open or
water is not being
supplied to the
instrument.
High-pressure tubing or
test cell has air in it.
High-pressure tubing or
test cell is leaking.
Pressure Release valve
not closed or is leaking.
Relief valve is not
holding pressure.
Relief valve is not
holding pressure.
High-pressure tubing
blocked by cement.
CYLINDER WATER
valve is open or
PRESSURE RELEASE
valve is open while
COOLING WATER is
ON.
Blown fuse on
instrument power
receptacle.
HEATER switch not in
the ON position.
Possible Solution
Open CYLINDER WATER valve
and check flow of water to the
instrument.
Crack high-pressure thermocouple
fitting and release any air trapped
in the lines or cylinder.
Check for water leakage and
isolate leak.
Close valve or replace stem/seat, if
necessary.
Turn Relief valve knob clockwise.
Debris may be trapped under relief
valve seat. Turn relief valve knob
counterclockwise all the way and
turn pump ON for a few seconds
to flush the debris off the seat.
Release pressure and clear tubing.
Close CYLINDER WATER valve
and/or PRESSURE RELEASE
valve.
Replace fuse with a 2.5A fuse.
Turn heater switch to ON position.
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