9.2 Operation
9.2.1 Control Panel (Fig. 6)
The control panel is equipped with:
•
A three position rocker switch.
•
Green, yellow and red LED status indicators.
•
Rotary control for temperature adjustment in the Manual mode.
The control panel connects to the
ASU
processor on the compressor using a 12 ft.
telephone type cable with modular connectors at each end.
A 30 ft. long accessory cable is available if needed. (Part No. 39230).
The
ISOTHERM ASU
refrigeration system can be operated in two modes.
•
In the
“NORMAL.AUTO”
position the
ASU
program manages the temperature and
compressor operation. Optimum refrigeration temperatures are maintained and
compressor operation is managed to consume a minimum of battery power.
•
In the
“MAN.TEMP”
position. The temperature can be manually adjusted.
In the center position the unit is switched off.
9.2.2 Operation
“NORMALAUTO” position:
The green light indicates that power is on and the
ASU
program is running.
The
ASU
feature senses when surplus power is available—from the engine alternator,
solar panels or wind chargers—and switches the compressor to high speed, quickly
freezing the holding plate. Thermal energy stored in the holding plate will keep the re-
frigerator cool for many hours without consuming battery power. The
ASU
control
then will restart the compressor at a low speed, using a minimum of power to maintain
a stable temperature in the box.
The yellow ”Economy” LED indicates low-speed compressor operation.
The red “Freeze” LED indicates high-speed compressor operation.
Fig. 6
