Thermo King TS 200/300 – Excessive Voltage Output

12 Volt Alternators With Internal Regular Setting:

When a Thermo King unit is installed on a truck, it is often connected to a truck battery. When both the Thermo King unit and the truck engine are running on the truck battery, the charging system with the higher voltage may automatically turn off the charging system with the lower voltage output.

If it is determined that the Thermo King regulator setting is higher than the truck charging system or the batteries are consuming more water than normal the following solution may help solve the problem.

•Remove the wire labeled SENSE and tape off.
•Add a jumper wire from 2A to the SENSE terminal on the back of the alternator.

This should reduce the voltage to the battery by 0.2 to 0.3 of a volt.

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