62-12023 3-2
3.1.4 Road Only - Cab Command
Figure 3.1 Cab Command - Road Only Units
a. Display
The digital display consists of three alphanumeric characters and three LEDs. The default value displayed is the
box temperature. The microprocessor enables selection of the display in degrees Celsius or Fahrenheit. The dis-
play also includes sentines for defrost operation (dF).
b. Unit operating LEDs
Green Light Status
Under normal operation, the green LED will
indicate the temperature control status. Refer
to Figure 3.2 for more detail.
Red Light Status
When an alarm has been detected, the red unit
indicating light flashes at 1 Hz. The light will
continue to flash at 1 Hz until the alarm is
cleared. At that point the steady green indica-
tor light will light and the alarm will become
inactive.
Figure 3.2 Green Light Status
Digital Display
Standby operation LED (Not applicable for Road Only Units)
Road operation LED
Unit operating LED
• Green: cycling (left-hand side)
• Red: not functioning properly (right-hand side)
SETPOINT
COOLING
HEATING
Steady green
LED
Green LED is
OFF
Green LED
flashing 1 Hz
NULL
BAND
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