Hitachi CHROMASTER 5160 Instruction Manual page 129

4.3.2 Troubleshooting
Table 4-3
No. Symptom
1 Even if the PROG key is
pressed, setting of input mode is
failed.
2 The pump does not start when
pressing the PUMP ON/OFF
key.
3 Gradient delivery does not start
when pressing the START key.
4 Purging can't be set or cancelled
by pressing the PURGE key.
5 A monitor lamp for the
degassing unit doesn't light up.
6 Air bubbles are coming out from
the exit of the degassing unit.
*1): PRESSURE MAX LIMIT ERROR also appears when the
pressure exceeds the internal pressure limit.
The limit is changed automatically related to the flow rate.
The internal pressure limit is 60 MPa for 0.000 to 2.500
mL/min, and 30 MPa for 2.501 to 5.000 mL/min.
Table 4-3 offers a guideline for the troubleshooting of the pump.
Refer to this table first, if a problem occurs.
The Chromaster 5160 Pump Troubleshooting
Cause
The program mode is not displayed.
Flow rate is set at 0.
1) The monitor screen is not
displayed.
2) The program mode is not
displayed.
1) monitor screen is not
displayed.
2) Waiting for numerical input.
1) The power supply of the pump
or the system unit is turned off.
2) The power supply cable is
unconnected.
1) Rapid suction
2) Looseness of the piping joint.
3) Clogging of the solvent filter
4) Negative pressure depending on
the position of the solvent bottle.
5) Incomplete replacement of
solvent
4 - 13
Measure
Set the program mode by
pressing the INITIAL key.
Set the flow rate by pressing the
MANUAL key of the MANUAL
function.
1) Display the monitor screen
by pressing the ESC key.
2) Set the program mode by
pressing the INITIAL key.
Display the monitor screen by
pressing the ESC key.
1) Turn on the power supply
for the pump or the system
unit.
2) Connect the power supply
cable.
1) Set suction velocity as:
5 mL/min and below for
replacement of the solvent.
3 mL/min and below for an
analysis.
2) Tighten the joint manually.
3) Wash the solvent filter.
4) Place the solvent bottle in
the same height as the
instrument.
5) Replace the solvent
completely.