DNA Engine Operations Manual
11-4 Tech Support: 1-800-4BIORAD • 1-800-424-6723 • www.bio-rad.com
Error Message Cause and Result Action
HS Sensor Fault, Alt
Control Mode
Alpha unit heat sink sensor is not
functioning properly, so machine
has begun estimating heat sink
temperature based on other tem-
perature sensor readings.
Alpha unit needs servicing soon.
Contact Bio-Rad or your local dis-
tributor.
HS Sensor Fault, Left
Ignored.
Same as previous Same as previous
HS Sensor Fault, Right
Ignored.
Same as previous Same as previous
Internal Fan Fault,
Return for Service
Fan inside base is not working, so
Alpha unit has been shut down.
Fan must be repaired. Contact
Bio-Rad or your local distributor.
Lid Sensor Fault,
Lid Was Disabled.
Heated lid is giving unexpected
temperature readings, so base has
turned it off. Protocols can still be
run, but reactions may fail because
of condensation in vessels.
Alpha unit needs servicing soon.
Contact Bio-Rad or your local dis-
tributor.
L/R Power Imbalance Thermoelectric units in Alpha unit
block are not heating uniformly, so
machine begins delivering equal
power to all heating elements.
Protocols may still be run, but
reactions may fail due to uneven
block temperatures.
Alpha unit needs servicing soon.
Contact Bio-Rad or your local
distributor.
Memory Is Corrupt! Rarely seen message indicating
that memory has been corrupted
by a static shock or other unusual
electronic incident.
Base needs servicing. Contact
Bio-Rad or your local distributor.
No Memory
Available!
All available memory has been
filled.
Delete unused protocols and
folders from memory. Reduce size
of stored programs by using GoTo
and the Inc and Ext options (see
chapter 6).
Probe Sensor Fault,
Used Calc Control
Either probe sensor is not working
properly or a probe-control pro-
tocol was run without probe being
installed. Machine has switched
temperature control method to
calculated control.
Make sure probe is installed when
running probe-control programs. If
error message persists, replace
probe.
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