Bio-Rad PowerPac™ Basic Power Supply - Manual (Page 13)

Section 4
Maintenance and Troubleshooting
4.1 Maintenance
The PowerPac Basic requires little maintenance to assure reliable operation. To clean the
case, first unplug the power supply. Use a damp cloth to wipe down the outer case.
4.2 Troubleshooting
Problem Cause Solution
No display/lights/fan 1. No AC power. 1. Check if PowerPac Basic is
2. Blown fuse. unplugged, or problem with AC
3. Power switch power source, or power switch is in
exercised rapidly to off position.
the on and off 2. Replace fuse. See section 4.3 for
positions. details.
3. The unit needs to be reset. Turn
power switch to the off position,
wait 5–10 seconds, then turn
power switch to the on position to
resume
normal operation.
Repeated blown fuses Hardware failure Contact Bio-Rad Technical Resources.
Leads from cell are Output terminals for the Use the PowerPac Adaptor, which
not long enough to fit PowerPac Basic are accommodates most standard 4 mm
output jacks recessed 16 mm to banana plugs, to make a secure
meet safety regulations. electrical connection.
Some leads are not
long enough to make
Note: Use of the PowerPac Adaptor
electrical connection. voids EN61010 safety provisions.
E1 error code No load detected Verify all electrical connections.
displayed Verify buffer levels where appropriate.
• Instrument not
connected to PS
• The current load is
below 4mA
E2 error code Over current (load Check for and correct any short circuit
displayed current greater then or excessive load problem. Excessive
400 mA) load due to high buffer concentration
will require the buffer be remade.
Then,
• Press
key to resume the run or,
• To clear the error code, press any
key (other then
key).
E3 error code Over voltage (load Turn power supply off, then on to.
displayed voltage over 300 V) reset If problems persists, contact
Bio-Rad Technical Resources.
E5 error code A power failure occurred during a timed run with Power Fail
Detection played (PFd) activated, and run is completed. Power Fail detection (Pfd) is
de-activated after completion or termination of each run.
E6 error code A power failure occurred during a timed run without Power Fail
displayed Detection (PFd) activated, and run is not completed.
E7 error code Power Failure occurred during an untimed run or the power switch
displayed was turned off before pressing stop,. and run is not completed.
Power Fail detect (Pfd) cannot be activated for untimed runs.
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