TK 57073-2-IM-EN
45
S–750i Unit Check List
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BEFORE installing the unit, visually inspect it for any damage. If any damage appears, file claim with delivery carrier.
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Install the fuel tank, fuel lines and unit as outlined in the Thermo King Installation Manual.
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Add 20 gallons (minimum) of ultra-low sulfur diesel fuel to the tank.
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Check battery and battery cable installation.
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Inspect fuel line routing checking for rubbing, chaffing or laying on hot surfaces.
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Visually inspect the unit for the following: Loose or improperly fitting bolts, brackets, hardware, hose connections,
and hose routing.
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Inspect all wiring connections and routing.
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Check defrost drain hoses and kazoos.
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Check unit mounting hardware for tightness.
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Check compressor and engine mounts.
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Check engine oil level.
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Check condenser and evaporator section for cleanliness and signs of refrigerant leaks.
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Check front bulkhead and air chute if equipped.
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Check for proper oil pressure, coolant temperature, oil, fuel, or coolant leaks.
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Check alternator or battery charger for proper output.
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Cycle the unit and ensure the unit functions in the correct modes and the mode indicators are working.
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Confirm engine speeds at normal engine running temperature. High Speed and Low Speed per maintenance
manual. Check @70° F (21 C) box temperature and 70° F (21 C) ambient.
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Set for continuous run with thermostat set point at 32 F (0 C) and run the unit to 32 F (0 C).
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Observe and record refrigerant operating pressures in relation to ambient and box temperatures.
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Verify the readings above are correct for the conditions.
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When box reaches 32 F (0 C) check calibration of thermostat, thermometer and data logger.
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Run unit for 30 minutes at 32 F (0 C). During this period check for correct cycling.
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Reset thermostat to 50 F (10 C).
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Check throttling valve while in the heat cycle.
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Check operation of Modulation system if equipped.
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Perform a controlled check of the refrigerant level.
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Initiate and check defrost operation and termination.
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Check for proper operation of all door switches.
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Remove the compartment bulk head(s) if equipped.
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Verify fuel level is sufficient to run unit for 6 hours, close trailer doors and initiate engine break-in mode. (more
engine break-in mode information can be found in the Diagnostic Manual).
To enter engine break-in mode: Menu>Maintenance Menu>Engine Break-in Mode>Select>Start. Engine will run for
6 hours to complete engine break-in.
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Run Pre-trip.
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Test AC electrical contacts and connections by connecting to AC power and running unit.
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Cycle thermostat and check for correct modes of operation.
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Power source not available to test AC.
