Thermo King Super II SR+, Manual

Page: 27 / 145

Operating Instructions (Rev 6/98)
17
CAUTION: With the selector switch in the CYCLE-
SENTRY position and the unit On-Off switch in the
ON position, the unit may start at any time without
warning.
Unit operation is controlled automatically by the micro-
processor, engine coolant temperature sensor, battery
voltage and defrost controls. The engine starts automat-
ically whenever the microprocessor calls for cooling or
heating, defrost timer initiates defrost, the engine cool-
ant temperature drops to -1° C (30° F), or the battery
voltage drops below the CYCLE-SENTRY Battery
Voltage setting. The engine runs until the unit reaches
setpoint, the battery is fully charged, and the block tem-
perature reaches 32° C (90° F). The engine is automati-
cally stopped by the CYCLE-SENTRY system.
Microprocessor Control Panel
THERMOGUARD MICROPROCESSOR CONTROL-
LER. The microprocessor controls all unit functions to
maintain the cargo at the proper temperature. The micropro-
cessor also continuously monitors discharge and return air
sensor temperatures and unit operational information.
The microprocessor control panel contains the LCD and the
keypad. The LCD shows various information. The keypad
controls the operation of the microprocessor. See the Opera-
tion and Diagnosis Manual (TK 40893) for details.
Basic Operation
NOTE: Do not move the CYCLE-SENTRY Continuous
Run switch while the unit is operating or the engine will
stop.
Manual Start (Continuous Run Operation)
With the selector switch in the CONTINUOUS position, the
unit will operate in its regular cooling and heating modes.
1. Hold the Preheat-Start switch in the PREHEAT posi-
tion for the required time.
2. Place the On-Off switch in the ON position.
3. Hold the Preheat-Start switch in the START position to
crank the engine. Release when the engine starts. DO
NOT release prematurely when the engine is extremely
cold.
CAUTION: Never use starting fluid.
If the engine fails to start within 15 seconds:
1. Turn the On-Off switch to OFF.
2. Check for and correct any alarm conditions and clear
the alarm codes. View the alarms with the CODE key,
clear the alarms with the CLEAR key, and then repeat
the manual start procedure. Refer to the appropriate
Operation and Diagnosis Manual for detailed informa-
tion about alarms.
If the engine still will not start, turn the On-Off switch OFF,
determine and correct the cause of the failure and repeat the
manual start procedure.
Automatic Start (CYCLE-SENTRY Operation)
With the selector switch placed in the CYCLE-SENTRY
position, the CYCLE-SENTRY system shuts down the unit
when the trailer temperature reaches the setpoint, and
restarts the unit on microprocessor demand. Start-ups may
also be initiated by defrost cycle initiation, low battery volt-
age, or engine coolant temperature demand.
Ambient Temperature
Preheat
Time
-18 ° to 0 ° C (0 ° to 32 ° F) 30 seconds
Below -18
°
C (0
°
F) 60 seconds