Applied Biosystems 2720 User Manual

7-6 Troubleshooting
Troubleshooting Information
Troubleshooting
Table
The following table lists the problem, possible causes, and a check and/or remedy for
troubleshooting the 2720 Thermal Cycler.
Problem Possible Causes Check and/or Remedy
Control panel not responding ♦ Key stuck in down position.
♦ Keypad failure.
♦ Look for depressed key and
free it.
♦ Run keypad diagnostic.
Refer to our Web site.
a
Cooling rate too slow ♦ Ambient temperature is too warm.
♦ Peltier failure.
♦ Move instrument to
well-ventilated location
(15–30 °C).
♦ Run rate test diagnostic.
Refer to our Web site.
a
Cycling time too long Peltier failure. Run cycle test diagnostic.
Displayed temperature does not match
specified temperature
Instrument may require calibration. Run the temperature verification
test.
Refer to our Web site.
a
Heated cover not responsive Heated cover failure. Refer to our Web site.
a
Heating rate too slow Peltier failure. Run rate test diagnostic.
Refer to our Web site.
a
Instrument can’t reach high or low
temperature range
♦ Peltier failure.
♦ Ambient temperature too warm.
♦ Run rate test diagnostic.
♦ Run cycle test diagnostic.
Refer to our Web site.
a
Instrument making too much noise Fan failure. Check for vent obstructions.
No screen display
No response when you turn the
instrument on
♦ Fuse blown.
♦ Not connected to power source.
♦ Is power switch ON?
♦ Is power cord connected?
♦ Check fuses.
Printer fails ♦ Incorrect printer configuration.
♦ Incorrect printer cable.
♦ Check printer for baud rate =
9600, no parity, one stop bit,
eight data bits.
♦ Purchase Applied Biosystems
printer cable.
Whirring fan does not sound ♦ Fuse blown.
♦ Not connected to power source.
♦ Is power switch ON?
♦ Is power cord connected?
♦ Check fuses.
Refer to our Web site.
a
a. http://www.appliedbiosystems.com/support/contact/

Applied Biosystems 2720 Specifications

General

Brand	Applied Biosystems
Model	2720
Category	Laboratory Equipment
Language	English