Electrical Maintenance
8-5
Field Current Test
Use this test to determine if the alternator can be repaired. Perform this test with the unit turned off.
1. Attach a clamp-on ammeter to the 2A wire near the B+ terminal on the alternator.
2. Energize the field on the Thermo King alternator by connecting a jumper wire between the F2 terminal and the B+ terminal.
Do not connect the F2 terminal to ground or the alternator will be damaged.
3. Note the ammeter reading. The ammeter reading indicates the field current, which should be 2.0 to 6.0 amps at 12 volts.
•
No field current or a low field current indicates an open circuit or excessive resistance in the field
circuit. Remove the voltage regulator and brush assembly and inspect the slip rings. If the slip rings
and are acceptable, install a new voltage regulator and brush assembly and repeat the test. If the
brushes are not the problem, replace the alternator.
•
High field current indicates a short in the field circuit. Replace the rotor or the alternator.
BATTERY
The Microprocessor Power switch must be placed in the Off position before connecting or disconnecting the battery terminals.
The Microprocessor Power switch is located on the control box side of the unit.
Inspect/clean the battery terminals and check the electrolyte level during scheduled maintenance inspections. A dead or low
battery can be the cause of an ammeter indicating discharge due to lack of initial excitation of the alternator even after the unit
has been boosted for starting. The minimum specific gravity should be 1.235. Add distilled water as necessary to maintain the
proper water level.
FUSES
TSR-2/TSR-3
A number of fuses protect various circuits and components. All the fuses except F21 are located on the interface board, which
is located inside the control box. F21 is located in the fuse holder between the REDB and 2 wires that go from the battery to the
2 terminal on the interface board. Refer to the appropriate Microprocessor Diagnostic Manual for a complete list of the size and
function of the fuses.
Fuse
Size
Function
F2
15A
Power to On/Off Switch
F3
40A
Fuel Sol Pull-In/Starter Circuit
F4
None
2A
No Fuse - All Bosch and Thermo King Alternators
2A Fuse - All Prestolite Alternators
F5
40A
Preheat Circuit
F6
15A
Damper and High Speed Circuits
F7
2A
8XP Circuit - Controller On Feedback to HMI
F8
5A
CAN Connector J12
F9
5A
CAN Connector J14
F10
10A
8X Power (Install fuse in upper position)
F11
10A
Power to Drain Tube Heater Relay for Remote Evaporator (Not Used)
F12
5A
CAN Connector J13
F13
2A
8FC Circuit (Remote Lights)
F15
P/S
On/Off Relay
F21
60A
Main Fuse (2 Circuit)
F20
2A
Alternator Sense
F22
Not Used
F23
Not Used
Summary of Contents for T-1000R
Page 14: ...Safety Precautions 2 6 Warning Decals 2e24151g0 ...
Page 34: ...Maintenance Inspection Schedule 4 10 ...
Page 57: ...Unit Description 5 23 Purge Mode UT Series 1 3 4 5 2 ...
Page 67: ...Unit Description 5 33 Zone 1 Cool and Zone 2 Cool UT SPECTRUM Units ...
Page 69: ...Unit Description 5 35 Purge Mode UT SPECTRUM Units ...
Page 71: ...Unit Description 5 37 Zone 1 Cool and Zone 2 Heat UT SPECTRUM Units ...
Page 72: ...Unit Description 5 38 ...
Page 74: ...Diesel Electric Menu 6 28 Adjust Brightness 6 29 Time 6 30 ...
Page 120: ...Operating Instructions Standard HMI 7 18 ...
Page 152: ...Engine Maintenance 9 14 T Series Fuel and Oil System Components TK 376 ...
Page 154: ...Engine Maintenance 9 16 T Series Fuel and Oil System Components TK 270 ...
Page 156: ...Engine Maintenance 9 18 UT Series Fuel System Components AMA768 ...
Page 172: ...Engine Maintenance 9 34 T Series Engine Mounting Components for 2 Cylinder Engine ...
Page 184: ...Engine Maintenance 9 46 ...
Page 238: ...Refrigeration Maintenance 10 54 ...
Page 246: ...Clutch Maintenance 11 8 ...
Page 258: ...Structural Maintenance 12 12 ...
Page 264: ...Mechanical Diagnosis 13 6 ...
Page 265: ...14 Electric Standby Diagnosis ...
Page 268: ...Electric Standby Diagnosis 14 4 ...
Page 269: ...15 Refrigeration System Diagnosis ...
Page 272: ...Refrigeration System Diagnosis 15 4 ...
Page 280: ...Remote Evaporators 16 8 ...