Cleaning And Maintenance; Troubleshooting - BIO RAD EP-1 Econo Pump Instruction Manual

Section 7

Cleaning and Maintenance

The Model EP-1 Econo Pump requires very little maintenance to assure
reliable operation. The procedures outlined below will insure maximum
pump life:
• Check tubing regularly for signs of cracking and wear. If any exist,
replace the tubing.
•
For optimal tubing life, use a slow to medium pump speed. To increase
throughput, increase tubing size to obtain the desired output.
• When not in use, tubing should be removed from the pump to prevent
deformation of the tubing. Remove the platen and relax the tubing by
unhooking one end of the tubing from the tubing bracket.
• To prevent the formation of precipitates around the pump head and on the
membrane key panel, promptly remove any spills. Clean with deionized
water.
Section 8

Troubleshooting

Problem Possible Cause
Pump displays Power surge or
"OUT" brownout
Pump displays Power outage
"FAIL"
Pump will not run No power
(no LEDs lit)
Fuses
Solution
l. Turn the power switch off.
2. Press and hold down the
(up arrow) key and the (CAL)
key simultaneously while turning
the power switch on. This will
reset the pump. If the pump was
previously calibrated you will
have to recalibrate it.
If you wish to continue a run in
progress, press (program run)
key. Otherwise, press the
(run/stop) key.
Verify that powercord is plugged
in and the power switch is turned
on.
Check that proper fuses are
installed and intact.
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Problem Possible Cause
Liquid remains Platen not adjusted
stationary in tubing
Clogged tubing,
valves, or fittings
Damaged tubing
Flow rate not Pump tubing
consistent damaged or worn out
Platen adjustment
incorrect
Wrong tubing size
selected
Large change in
back pressure or
fluid viscosity
Restriction on inlet
side
Excessive tubing Platen too tight
wear
Pump must be
Cannot calibrate
stopped in order to
pump
calibrate pump
Error message
displayed upon
powering up (ER ##)
OIL
Solution
Insure that the calibration indica-
torlight is not flashing. For pump
to run, this light must either be
off or steadily lit.
Platen too loose. Turn platen
screw clockwise just until liquid
begins moving within tubing.
Check tubing, fittings, and valves
for obstructions.
Check pump tubing for damage.
Replace damaged tubing.
Replace tubing.
Adjust platen.
Re-select tubing size on front
panel of pump.
Re-calibrate flow.
Remedy
Turn platen adjustment screw
clockwise to stop flow, then
clockwise until flow starts.
Insure that pump is stopped.
Contact Bio-Rad Instrument
Service Department
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