Thermo King 088669, Руководство пользователя

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Safety Precautions (Rev. 04/03)
iii
Low Voltage
Control circuits used in the refrigeration unit are low volt-
age (12 volts dc). This voltage potential is not considered
dangerous, but the large amount of current available (over
30 amperes) can cause severe burns if shorted or ground.
Do not wear jewelry, watch or rings when working on the
unit. If these items contact an electrical circuit, severe burns
may result.
µP-T MICROPROCESSOR CAUTIONS
The following procedures may not be readily apparent, but
must be followed when working on units equipped with
µP-T microprocessors.
• Precautions must be taken to prevent electrostatic dis-
charge when servicing the microprocessor and related
components. A potential difference less than that
required to produce a small spark between a finger and
a doorknob can cause severe damage to solid state com-
ponents. Refer to the Thermoguard µP-IV Micropro-
cessor Controller Operations and Diagnosis Manual
(TK 41087) (T.I.P. Procedure #P41AA12B) and the
Electrostatic Discharge Training Guide (TK 40282) for
additional information.
• Never use testers consisting of a battery and a light bulb
to test circuits on any microprocessor based equipment.
• Before connecting or disconnecting the battery, the
microprocessor switch must be turned OFF.
NOTE: The following T.I.P. Procedures may be found in
Operation and Diagnosis Manual TK 41087.
• Replacing and calibrating the return air and discharge
sensor.
• Replacing the µP-T microprocessor.
• Welding on the unit or truck.