TK 55711-19-OP-EN
29
Clearing Alarms
Alarm codes can be cleared by turning the controller off and back on again. If
the condition that caused the alarm still exists, the alarm will return. Refer to
the TriPac Evolution Diagnostic Manual TK 55739 for more information
about alarm codes. Contact the nearest Thermo King dealer if alarms
continue to appear.
Operating Modes
Cool Mode
When Cool Mode is selected using the Mode Selector knob, the HMI Control
Panel uses the Cab Temperature Sensor to measure sleeper compartment
temperature. If it is above the temperature selected by the Temperature
Selector knob, the APU engine will begin a start sequence (if not already
running). The evaporator fan is defaulted ON and will run in low or the speed
selected by the Fan Speed Selector knob. The compressor clutch and
condenser fan will engage 60 seconds after a successful engine start. The
system will cool the sleeper compartment until it falls to the selected
setpoint temperature. The compressor clutch will disengage but the APU
engine will continue to run for several minutes based on the Engine Delay
Timer setting (default eight minutes). The evaporator fan will continue to run
at the selected speed. If sleeper compartment temperature rises above
setpoint by more than the Dead Band setting (default 3°F) during this time
the compressor clutch will re-engage.
During normal air conditioning operation the compressor clutch may cycle
on and off with no alarm but the evaporator fan will continue to run. This
indicates the system is monitoring the Evaporator Coil temperature sensor
to prevent frost buildup on the evaporator coil. If the Evaporator Coil
temperature falls below 32°F (0°C) the compressor clutch is de-energized.
When the Evaporator Coil temperature rises above 45°F (7.2°C) the
compressor clutch is energized. With the optional 120 Amp Charging
System, the alternator will not charge for 5 to 10 seconds after the
compressor clutch is engaged. It will continue charging when the clutch is
disengaged.
The APU engine will shut down when the sleeper compartment temperature
reaches setpoint and no other demands exist. The Evaporator Fan will
continue to run. If the sleeper compartment temperature rises above
setpoint by more than the Dead Band setting (default 3°F) the APU engine
will restart and compressor clutch will re-engage. Battery voltage sensing
and engine coolant temperature sensing (if equipped with the Arctic Option)
are enabled for the APU. Refer to (
) for details.
