13/11/2018
Page 16
Troubleshooting
Many operating problems may be solved by carefully reading and following
the instructions in this manual accordingly. Some suggestions for
troubleshooting are given below. Should these suggestions not resolve the
problem, contact our service department or a distributor in your region for
assistance. If troubleshooting service is required, please include a full
description of the problem.
Problem
Possible Causes
Solution
No Display / lights
No AC power
Check if powerPRO power supply is
plugged, or AC power source has
problem.
AC power cord is not
connected
Check AC power cord connections at
both ends. Use the correct cords.
The fuse has blown
Replace the fuse.
Repeated fuse broken Hardware failure
Contact Cleaver Scientific service
department
Operation stops and
the screen displays
Communication wires on
circuit board have loosen
or broken.
It is recommended to send the machine
back to local distributor or our Service
Department for maintenance.
Operation stops with
alarm: The screen
displays
Electrophoresis leads are
not connected to the
power supply or to the
electrophoresis unit(s), or
there is a broken circuit in
the electrophoresis cell
Check the connections to the power
supply and on your electrophoresis cell to
make sure the connection is intact; check
condition of wires in electrophoresis unit.
Close the circuit by reconnecting the
cables. Press
START/STOP
to restart the run.
High resistance due to
tape left on a pre-cast
gel, incorrect buffer
concentration, or
incorrect buffer volumes
in the electrophoresis cell
Make sure the tape is removed from the
pre-cast gel, buffers are prepared
correctly, and the recommended volume
of buffer is added to the electrophoresis
unit.
High voltage application
is set to run on a very low
current
DISABLE No Load alarm on the Display
Screen
Operation stops with
alarm. Display shows
Bad connections for
terminal connectors or
damaged wires or
damaged platinum wires
Check all the connections to terminators,
cables, wires, and gel tanks
