freightliner Park Smart User Manual

1
Technical Information and Diagnostic Guide
FOR
Freightliner Park Smart No Idle System
This guide will assist you in becoming more familiar with the working components of
the Park Smart® System and the proper steps and procedures to completely diagnose
the no idle unit.

freightliner Park Smart Specifications

General

Brand	freightliner
Model	Park Smart
Category	Automobile Accessories
Language	English

Summary

External Component Identification and Location

Battery Separator

Separates main starting batteries from AUX batteries, allowing charging.

Fuses (F1-F5)

Protects various components like compressor, controls, heater, blower, and condenser fan.

Relays

Control voltage to compressor, condenser fan, and evaporator blower based on operational mode.

Blend Door Actuator

Operates the blend door to direct airflow through the evaporator coil and heater core.

AUX Control Panel

Controls HVAC functions, featuring lights that activate in Park mode.

Internal Components

Control PCB Assembly

Stores the operating program and controls the Park Smart unit's components.

Compressor

The primary component of the hermetically sealed refrigeration system.

Compressor Thermal Limit Switch

A normally closed switch that protects the compressor from overheating.

Evaporator Blower

Pulls air through the evaporator coil to cool the sleeper's interior.

Condenser Fan

Draws ambient air through the condenser coil to cool the refrigerant.

Pressure Switches

Includes High Pressure Switch and Evaporator Sensor/Freeze Switch for system protection.

Temperature Sensors

Includes Sleeper Sensor and Outside Air Sensor for monitoring temperatures.

Diagnostics Table

Appendix

Battery Condition and Performance

Criticality of battery voltage and condition for reliable Park Smart unit operation.

Separator Testing

Procedure to check separator operation and AUX battery charging.

AUX Control Panel Testing

Steps to test voltage and signal integrity at the AUX Control Panel connector.

Relay Testing

Methods to verify relay functionality by checking voltage and coil resistance.

Pressure Switch Testing

Testing the pressure switch continuity for proper system operation.

Fuse Testing

Guidelines for checking fuse continuity and voltage presence.

Evaporator Sensor/Freeze Switch Testing

Verifying the sensor's condition to prevent compressor icing.

Compressor Thermal Limit Switch Testing

Checking the continuity of the thermal switch for compressor protection.

Control PCB Assembly Testing

Comprehensive testing of voltage inputs and outputs for the control PCB.

Condenser Fan Motor Testing

Procedures to check voltage and signal for the condenser fan motor.

Evaporator Blower Motor Testing

Procedures to check voltage and signal for the evaporator blower motor.

Compressor Mounts and Actuator Testing

Inspecting compressor mounts and testing the blend door actuator.

Temperature Sensor Testing

Testing Sleeper and Outside Air temperature sensors for accurate readings.