HEMACOOL
TM
Model HMC-MIL-1 Operations Manual August 2003
Energy Storage Technologies, Inc.
Dayton, Ohio 45459
D. HemaCool™ DISPLAY AND ALARM FUNCTIONS:
Information on the status of the
HemaCool™
is presented on a display panel (
Fig. 10
),
which employs two light emitting diodes [LED] and a liquid crystal display (LCD) that
includes two rows of text.
LEDs:
Two multicolored LED indicators provide temperature and battery status alarms. The
temperature LED – on the left – shows GREEN when the temperature is in the selected
range and RED when it is outside that range. In COOL mode it will also turn YELLOW
when the unit is switching between compressor and heater operation. This happens if the
ambient temperature has crossed over to the other side of the control temperature. The
battery status LED – on the right – shows GREEN when the battery has 10% or more of
charge, YELLOW when it has less than 10% of charge, and RED when the charge is
nearly gone. (When the unit is operated on AC power, the battery status [right LED]
should always illuminate GREEN or change to GREEN within a few minutes as the
internal battery recharges).
The tables below show the exact temperatures and voltages that trigger the LED color
changes for different set points:
Temperature LED Indictors: Temperatures for COOL mode
LED COLOR
PAYLOAD SPACE TEMPERATURE
GREEN
Between 1.0°C and 6.0°C (Between
34°F and 43°F)
YELLOW
Unit is transitioning from compressor
to heater operation or vice versa.
RED
1°C and Below (34°F and Below)
