Service Manual
Table Of Contents
- 627333-A
- 01 Introduction
- Safety
- Follow Safety Instructions
- Prepare for Emergencies
- Safety Alert Symbol
- Signal Words
- Informational Messages
- Important Safety Information
- General Hazard Information
- Emergency Exit From Cab
- Operating The Vehicle Safely
- Prevent Vehicle Runaway
- Use Safety Lights and Devices
- Operating On Slopes
- Traveling On Public Roads
- Stopping And Parking The Vehicle
- System Boom Safety
- Avoid Eye Contact With Radar
- Exhaust Fumes
- Overhead Electrical Power Lines
- Noise
- Handle Fuel Safely - Avoid Fires
- Stay Clear Of Rotating Drive Lines And Moving Parts
- Towing Other Vehicles / Trailers / Equipment
- Modifications
- Maintenance And Service Safety
- Practice Safe Maintenance
- Chemical Safety
- Wear Protective Clothing
- Work In A Clean Area
- Understand Correct Service
- Use Proper Tools
- Support Machine Properly
- Proper Lifting Equipment
- High-Pressure Fluids
- Hydraulic Hoses
- Avoid Heating Near Pressurized Fluid Lines
- Service Cooling System Safely
- Remove Paint Before Welding Or Heating
- Batteries
- Tires And Wheels
- Dispose Of Waste Properly
- Mobile Radio Installations
- Maintenance In The Articulation Joint (Hinge) Area
- Safety Tread and Grip Material
- Safety And Service Decal Locations Chassis
- Safety And Service Decal Locations Cabine
- General
- Dimensions
- Torque Specifications
- Jack Up The Machine
- Tooling list
- Index
- Safety
- 02 Engine
- 03 Powertrain
- Transmission Service Manual
- Transmission and Solenoids
- Testing and Adjusting
- Transmission Troubleshooting
- Disassembly and Assembly
- Drive line
- Index
- TA19 KENR6054-00
- TA19 KENR6678 (Modification)
- 04 Chassis
- MM9L(Modification)
- 05 Cab
- Cab
- Cab Seat
- HVAC
- General Information
- Theory of operation
- Basics of Refrigeration
- Air Conditioning Process
- HVAC System
- Automatic Temperature Control
- Refrigerant Relief Valve
- Temperature Sensors
- Evaporator Coil
- Heater Core (Cab)
- Actuator Motor (Water Valve)
- AirFlow
- Motor (Air Conditioning Blower)
- Speed Control
- Actuator Motor (Damper)
- Glossary of Terms
- HVAC Specification
- HVAC Testing and Adjusting
- Troubleshooting Machine Preparation
- General Troubleshooting Information
- Visual Inspection
- Troubleshooting Faults With Service Codes (Active)
- Troubleshooting Air Conditioner Control
- Problem List
- Probable Causes
- No Display
- Probable Solution
- No Blower Fan
- Probable solution
- No Heat
- Probable Solution
- No Cooling
- Probable Solution
- System is putting out cool air when heat needed
- Probable Solutions
- System is putting out hot air when cooling needed.
- Probable Solution
- No Fan or Erratic Fan
- Probable Solutions
- Nothing Works
- Probable Solution
- Electric Actuator for Mode of Airflow is not Moving or Working Properly
- Probable Solutions
- Refrigerant Compressor Oil - Check
- Refrigerant System - Charge
- Complete Charge of System from a Refrigerant Tank with a Scale
- Adding Additional Refrigerant to an Air Conditioning System with Low Charge
- Manifold Gauge Set (Refrigerant) - Remove
- Control Panel - Test
- Index
- 06 Electrical
- 07 Hydraulic
- 08 Air System
5-14 627333-A
HVAC
AUTOMATIC TEMPERATURE CONTROL
Description
The Automatic Temperature Control (ATC) allows for
true interior cab temperature control and continuously
variable blower fan speed through the use of advanced
microprocessor and sensor technology.
1. ON / OFF - Powers vehicle Heater-A/C control
system on or off. The LED numeric display is
illuminated when the unit is turned on. The display
will show the current set point temperature.
2. AUTO - Places the system in a fully automatic
temperature control mode including automatic fan
speed control. A panel light indicates when this
mode is active. The system will adjust the blower
fan speed to the lowest setting necessary to
maintain the cab temperature at the displayed set
point temperature.
3. DEF (Defrost icon) - Energizes the A/C system to
allow for rapid de-humidification of the cab. The A/C
will be enabled even if the set point temperature
requires heat. A panel light indicates when this
modes is active.
4. FAN UP / DOWN - Overrides the automatic fan
speed control feature. Increments fan speed up or
down in eleven steps. The digital display indicates
the fan speed setting as a percentage or “HI” when
maximum fan speed is reached or “LO” when
minimum fan speed is reached then returns to
normal display five seconds after either key is
depressed. The set point fan speed is maintained
until it is changed or if the AUTO key is depressed.
5. TEMPERATURE UP / DOWN - Increments the set
point temperature up or down. The system will
control the electronic water valve and/or the A/C
compressor clutch to hold the cab temperature as
closely as possible to set point temperature.
6. ECON (Economy Mode) - When depressed, locks
out the A/C function. The control uses only fresh air,
fan speed, and water valve control to maintain the
set point temperature. Depressing the ECON key
will return the system back to normal operation. A
panel light indicates when this mode is active.
7. C / F - Switch between Fahrenheit and Celsius.
FIG. 3
1
2
3
6
7
4
5
Climate Control
4
5