Thermo King KD-II SR, Manual

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Unit Description (Rev. 04/03)
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• Dairy products
• Candy
• Chemicals
• Film
• All non-edible products.
The above listings are not all inclusive. Consult your
grower or shipper if you have any questions about the
operating mode selection of your type of load.
Continuous Run Operation
With the selector switch in the CONTINUOUS-RUN posi-
tion, the unit will operate in its regular cooling and heating
modes. Refer to starting instructions for Standard Units.
Auto Start-Stop Operation
With the selector switch in the CYCLE-SENTRY (AUTO
START-STOP) position (or CYCLE-SENTRY icon visible
in µP-T display), the CYCLE-SENTRY system shuts down
the unit when the compartment temperature reaches the
thermostat setpoint and restarts the unit on thermostat
demand.
On CYCLE-SENTRY equipped units, unit start-ups may
also be initiated by defrost cycle initiation or engine block
temperature switch demand.
If defrost is initiated manually or automatically (defrost
timer or air switch), the unit will start and operate on high
speed. When the defrost cycle is complete, the unit will
operate in whichever operating mode the thermostat is call-
ing for until the compartment temperature reaches setpoint.
In cold ambients, the CYCLE-SENTRY system automati-
cally maintains engine temperature by restarting the unit if
the engine block temperature drops to 35 F (18 C on units
without Preheat). When the unit starts up because of low
engine block temperature, the unit will operate in whichever
operating mode the unit thermostat is calling for until the
battery is fully charged (optional) and the engine block tem-
perature rises to 120 F (49 C on SR models or units without
Preheat).
After the unit starts from thermostat demand, defrost initia-
tion or engine block temperature thermostat demand, a bat-
tery sentry switch monitors the voltage across the field of
the alternator and will keep the unit operating until the bat-
tery is recharged sufficiently. The unit operates in which-
ever mode the thermostat requires to properly maintain the
load temperature. When the battery is sufficiently
recharged, the unit will shut down on thermostat demand.
WARNING: With the ON/Off switch (or ON key)
“ON” and the selector switch in CYCLE-SENTRY
(Auto Start-Stop) position (or CYCLE-SENTRY icon visi-
ble in µP-T display), the unit may start at any time without
proper warning.
NOTE: Fully charged batteries in good condition are
essential for reliable unit operation. This is especially true
on CYCLE-SENTRY equipped units in cold weather.
Restarting the Unit
These procedures are used when starting units that have
been shut off for short periods of time. When a unit has been
shut off for a long period of time is first started, it should be
started and put through a full unit self check.
Automatic Start (CYCLE-SENTRY Equipped Units)
1. Push the ON key.
2. After a 10 second delay, the unit should preheat and
start automatically.
NOTE: When the CYCLE-SENTRY icon is active, the
unit may not start if: the compartment temperature is
near the setpoint, the engine is warm, and the battery
is fully charged.