Thermo King SLXi Spectrum, Maintenance Manual

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Unit Description 5-5
The controller starts and operates the unit:
• If the compartment temperature demands Cool or Heat operation,
• If the engine block temperature decreases to -1 C
or
• If the battery charge level is decreases below a battery sentry voltage limit, typically 12.6 Volts (TG-VI, µP-IV, µP-V, µP-VI,
SR-2 and SR-3 controllers ONLY).
• When the CYCLE-SENTRY system automatically starts the unit, the engine operates until:
• The compartment temperature demand for Cool or Heat is satisfied,
• The engine block temperature increases to 32 C
• The battery is fully charged (ALL CYCLE-SENTRY systems).
NOTE: SLXi units Battery sentry Level set at 12.6 Volts
CAUTION: Operation in confined spaces. Diesel operation should be avoided in areas or circumstances where fumes from
the engine could become trapped and cause serious injury or death.
WARNING: With the CYCLE-SENTRY switch in the CYCLE position (or CYCLE-SENTRY icon ON in TG-VI, SR-2 and
SR-3 display) and the unit On/Off switch in the ON position, the unit may start at any time without prior warning.
NOTE: A buzzer sounds when the unit is automatically preheating.
CYCLE-SENTRY system features:
• Offers either CYCLE-SENTRY (Start-Stop) or Continuous Run operation
• Controller regulated all-season temperature control
• Maintains minimum engine temperature in low ambient conditions
• Battery Sentry fully charges battery before automatic unit shift to Null (engine shutdown)
• Variable preheat time
• Preheat indicator buzzer
• CYCLE-SENTRY Fresh (CSFR) feature (µP-IV, µP-V, µP-VI, SR-2 and SR-3 controllers only) places the unit on
Continuous Run operation when cargo requires continuous air circulation. CSFR operation is determined by a programmable
setpoint temperature range that locks out CYCLE-SENTRY Start-Stop operation.
CYCLE-SENTRY is designed for use only with products which do not require tight temperature control or continuous airflow,
such as all deep frozen products and non-perishable non-frozen products.
The start/stop nature of CYCLE-SENTRY does not satisfy the temperature control or airflow requirements for perishable or
temperature sensitive products. Thermo King therefore does NOT recommend the use of CYCLE-SENTRY control for these
products.
Economy Mode Control Option
The µP-VI, SR-2 and SR-3 control systems include the Economy mode feature as standard. The Economy mode can be turned
ON or OFF for both CYCLE-SENTRY and Continuous Run operation.
Economy mode operation can save additional fuel by extending the length of the Null mode when the unit set for
CYCLE-SENTRY operation. The CYCLE-SENTRY Null Range changes from 2.8 C to 5.6 C (default setting) when the
Economy mode is ON. The CYCLE-SENTRY Null Range can also be adjusted from 2.8 C to 11.2 C.
The Economy mode saves fuel when the unit is set for Continuous Run operation by extending the length of the Low Speed Cool
mode. The Low Speed Switch Point changes from 2.0 C to 5.6 C (default setting) when the Economy mode is ON. The Low
Speed Switch Point can also be adjusted from 1.7 C to 8.4 C.
NOTE: All SLXi 100/200/Spectrum models have a configurable cycle sentry NULL range from 2.7-8.5 C.
SLXi 300/400 models (configured with an ETV) have a configurable CYCLE SENTRY null range from 1.5-8.5 C in fresh
range, and 2.0-8.5 C in frozen range.