Thermo King SLXi Spectrum, Руководство по обслуживанию

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Electrical Maintenance 8-3
• The battery must be well charged, the battery cable connections must be clean and tight, and the 2A and excitation circuits
must be connected properly.
NOTE: All voltage readings should be taken between the negative battery terminal, or a good chassis ground, and the
terminals indicated, unless stated otherwise.
CAUTION: Check to make sure the alternator field fuse (F15 on uP-VI and TG-VI, F7 on uP-IV and F4 on SR-2/SR-3) has
been removed from the relay board. If the fuse has not been removed, the voltage regulator has probably been damaged.
1. Set the unit for CONTINUOUS operation and place the main On-Off switch in the OFF position.
2. Check the battery voltage. If the battery voltage is less than 12 volts, the battery must be charged or tested to determine if it
should be replaced.
3. Check the voltage at the B+ terminal on the alternator. Battery voltage must be present. If not, check the 2A circuit.
4. Disconnect the alternator harness from the voltage regulator by carefully pushing on the spring clip to release the plug lock.
5. Set the unit for CONTINUOUS operation and place the main On-Off switch in the ON position.
6. Check the voltage at pin A and pin B in the two pin connector on the alternator harness.
a. The A pin is the battery sense circuit and should be at battery voltage. If not, check the sense circuit (2 or equivalent) in the
alternator harness and in the main wire harness.
b.The B pin is the excitation circuit and should be at 10 volts or higher. If not, check the excitation circuit (7K or equivalent)
in the alternator harness and in the main wire harness.
7. If battery voltage is present on the sense and excitation circuits, connect the alternator harness to the voltage regulator and
check the voltage on the B pin in the two pin connector on alternator harness. The voltage should be 1 to 3 volts.
a. No voltage or a voltage reading below 1 volt indicates that the rotor or the voltage regulator may be shorted. Perform the
field current test to further isolate the problem.
b.A voltage reading above 3 volts indicates that the field circuit may be open or have high resistance. The brushes or the rotor
are probably defective.
Check Points for Bosch Alternator Test
1. Check 2A Amperage Here
2. Check B+ Voltage Here
3. Check Excitation Circuit Voltage Here
4. Place Full Fielding Jumper Here