64
TK 61738-2-OP-EN
Null / Running Null
The unit will enter in to Null Mode after the trailer temperature reaches
setpoint when operating in Cycle Sentry operating mode. In the null mode,
the diesel engine will shut down. but the microprocessor will continue to
monitor the trailer box temperature. If the temperature varies two degrees
above or below setpoint, the diesel engine will automatically restart to bring
the trailer box temperature back into range.
•
The TRAILER TEMP box will change to a “
“G
Grre
ey
y”
” color which defines the
trailer unit as operating in “Null / Running NULL”.
Figure 36.
Null Display Shown
