![background image](http://html1.mh-extra.com/html/thermo-king/088669/088669_manual_1104404011.webp)
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.
Summary of Contents for 088669
Page 4: ......
Page 8: ......
Page 12: ...Safety Precautions Rev 04 03 iv PUB126...
Page 13: ...Safety Precautions Rev 04 03 v aea105...
Page 14: ......
Page 28: ...Unit Description Rev 04 03 14 Rear View Curbside RD II SR Evaporator aea105...
Page 32: ...Unit Description Rev 04 03 18 Power Receptacle Box RD II SR 50 aea102...
Page 76: ...Refrigeration Maintenance Rev 04 03 62...
Page 77: ...Refrigeration Maintenance Rev 04 03 63...
Page 81: ...Refrigeration Maintenance Rev 04 03 67...
Page 103: ...89 Hilliard Clutch Maintenance Clutch Assembly...
Page 106: ...Hilliard Clutch Maintenance Rev 04 03 92 12 Install retaining ring Clutch Torque Values...
Page 125: ...111 Cool Cycle RD II SR with TherMax Heating...
Page 126: ...112 Condenser Cycle RD II SR with TherMax Heating...
Page 127: ...113 Heat and Defrost Cycle RD II SR with TherMax Heating...
Page 129: ...115...
Page 130: ...116...
Page 131: ...117...
Page 132: ...118...
Page 133: ...119...
Page 134: ...120...
Page 135: ...121...
Page 136: ...122...