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TK 61753-2-MM-EN
Use the Gauges Menu to observe the ETV position during the ETV test. The expected ETV position observation is a
decrease followed by an increase. The suction pressure should decrease when the valve position decreases and
increase when the valve position increases.
Refer to the appropriate Diagnostic Manual for complete information about the testing and operation of the ETV.
Refer to “Electronic Throttling Valve” in Refrigeration Service Operations for removal and installation procedures.
Figure 2. ETV
1. Inlet
2. Valve Body
3. Stepper Motor
4. Outlet
CYCLE-SENTRY™™ Start-Stop Controls
The CYCLE-SENTRY Start-Stop fuel saving system provides optimum operating economy.
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When CYCLE-SENTRY Mode is selected, the unit will start and stop automatically to maintain setpoint, keep the engine
warm, and the battery charged. When Continuous Mode is selected, the unit starts automatically and runs continuously
to maintain setpoint and provide constant airflow.
NNoottee:: The Controller provides a wide range of control and programming flexibility. However, pre-programming of the
unit controller may prohibit operation in certain temperature ranges within some modes and may also prohibit
certain modes of operation.
In CYCLE-SENTRY, if the block temperature falls below 30 F (-1 C), the engine will start and run until the block
temperature is above 90 F (32 C). If the battery voltage falls to the programmed limit selected by CYCLE-SENTRY
Battery Voltage (typically 12.6 volts) and Diesel CYCLE-SENTRY mode is selected, the engine will start and run until the
charge rate falls below that programmed by CYCLE-SENTRY Amps (typically 2 amperes).
Features of the CYCLE-SENTRY system are:
• Offers either CYCLE-SENTRY or Continuous Run operation.
• Controller regulated all season temperature control.
• Maintains minimum engine temperature in low ambient conditions.
• Battery Sentry keeps batteries fully charged during unit operation.
• Variable preheat time.
• Preheat indicator buzzer.
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