New Holland T8010 Manual page 973

SAFETY PROCEDURES ............................................................................................................................... 50-1-5
SPECIAL TOOLS ........................................................................................................................................... 50-1-6
A/C THERMAL OPERATION ......................................................................................................................... 50-1-7
A/C SYSTEM COMPONENTS ....................................................................................................................... 50-1-9
Cab HVAC Box Components - Automatic Temperature Control ................................................................ 50-1-9
Chassis Components ................................................................................................................................ 50-1-11
AUTOMATIC TEMPERATURE CONTROL (ATC) OPERATION ................................................................. 50-1-12
Operation Modes ...................................................................................................................................... 50-1-15
Automatic Mode ...................................................................................................................................... 50-1-15
Defog Mode ............................................................................................................................................. 50-1-15
Automatic Operation Summary ............................................................................................................... 50-1-16
Defog/Dehumidify Operation Summary .................................................................................................. 50-1-17
ATC Fault Codes ...................................................................................................................................... 50-1-18
ATC Fault Code 111 ............................................................................................................................... 50-1-18
ATC Fault Code 112 ............................................................................................................................... 50-1-19
ATC Fault Code 115 ............................................................................................................................... 50-1-19
ATC Fault Code 116 ............................................................................................................................... 50-1-20
ATC Fault Code 120 ............................................................................................................................... 50-1-20
ATC Fault Code 121 ............................................................................................................................... 50-1-21
ATC Fault Code 122 ............................................................................................................................... 50-1-21
ATC Fault Code 125 ............................................................................................................................... 50-1-22
ATC Fault Code 126 ............................................................................................................................... 50-1-22
ATC Fault Code 127 ............................................................................................................................... 50-1-23
ATC Fault Code 128 ............................................................................................................................... 50-1-23
ATC Fault Code 129 ............................................................................................................................... 50-1-24
ATC Fault Code 130 ............................................................................................................................... 50-1-24
ATC Fault Code 131 ............................................................................................................................... 50-1-25
ATC Fault Code 132 ............................................................................................................................... 50-1-25
ATC Fault Code 133 ............................................................................................................................... 50-1-26
ATC Fault Code 134 ............................................................................................................................... 50-1-26
Locating System Problems Without Fault Codes ...................................................................................... 50-1-27
Controller-Based Resistance Tests ......................................................................................................... 50-1-27
ATC Controller Test (Connector J8 Test Points) ...................................................................................... 50-1-29
ATC Field Reported Symptoms/Causes ................................................................................................... 50-1-32
Compressor And Clutch ............................................................................................................................ 50-1-33
Operational Check .................................................................................................................................. 50-1-33
Electrical Test .......................................................................................................................................... 50-1-36
Compressor Clutch Control Circuit Test Procedure ................................................................................ 50-1-36
Service Note: Adjusting Clutch Air Gap .................................................................................................. 50-1-38
High And Low Pressure Switch Clutch Latching Circuit ............................................................................ 50-1-39
Background ............................................................................................................................................. 50-1-39
Possible Failure Modes - Fault Codes 129 and 134 ............................................................................... 50-1-40
Electrical Test .......................................................................................................................................... 50-1-41
High Pressure Switch and Circuit Test .................................................................................................... 50-1-41
Low Pressure Switch and Circuit Test .................................................................................................... 50-1-42
Heater Control Valve ................................................................................................................................. 50-1-43
Operational Check .................................................................................................................................. 50-1-43
Electrical Test .......................................................................................................................................... 50-1-44
Heater Control Valve Power, Signal and Ground Test ............................................................................ 50-1-44
Section 50 - Climate Control - Chapter 1
TABLE OF CONTENTS
50-1-2