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Maintenance and Troubleshooting
4.0 MAINTENANCE AND TROUBLESHOOTING
4.1 MAINTENANCE
PowerPac power supplies require very 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. Avoid wetting the connectors
located below the front panel and on the rear of the unit.
4.2 TROUBLESHOOTING
If there is no LED display, check the power cord connections and the fuse in the back of the unit. (Refer to
section 4.3.) If a system or operator error occurs, the appropriate error code will appear flashing on the LED
display. The power supply does not output power when an error code is displayed.
Error
Code
Explanation
E 1
No Load Detected
• The electrophoresis cell(s) are
not plugged in.
• The cell was unplugged during a run • Press the
• The current load dropped below
the accepted rating, as listed below:
PowerPac 300 was less than 4 mA
PowerPac 200 was less than 5 mA
E 2
Short Circuit
The current load exceeded
the following:
PowerPac 200: 2.5 A
PowerPac 300: 400 mA
E 5
Power Failure During a Timed Run
Power Failure detect (PFd) was
activated; the run was completed
after the power failure.
Caution:
If a timed run with PFd activation is
terminated by turning the main
power switch off, the power supply
will resume operation under the
previous run parameters when the main
power switch is turned back on.
10
Solution
Check all electrical connections to the electrophoresis
cell and whether the cell contains the appropriate buffer
volume. Then,
key to resume the run or,
• To clear the error code, press any key (other than the
key)
Check for and correct any short circuit or excessive load
problem. Excessive load due to a high buffer concentration
will require the buffer be remade. Then,
• Press the
key to resume the run or,
• To clear the error code, press any key (other than the
key).
To clear the error code, press any key (other than
The
key is disabled until the error code is cleared.
Reminder:
Time is reset to zero after each timed run. Enter a time
value prior to each timed run. PFd is disabled after each
run. If PFd is required, activate it prior to starting the run.
POWER
PAC
key.)
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