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Safety Precautions
17
Electrical Hazards
High Voltage
Low Voltage
Microprocessor Service
Precautions
Take precautions to prevent electrostatic
discharge when servicing the microprocessor and
its related components. Even tiny amounts of
current can severely damage or destroy electronic
components.
Observe the following precautions when servicing
a microprocessor control system to avoid
damaging electronic components. Refer to the
ThermoGuard SPECTRUM TS Multi-Temp
Microprocessor Control System Diagnostic
Manual (TK 51652) and the Electrostatic
Discharge Training Guide (TK 40282) for more
information.
•
If the microprocessor has a power switch, turn
it OFF before connecting or disconnecting the
battery.
•
Disconnect power to the unit.
CAUTION: Wipe up spills immediately.
Refrigerant oil can damage paints and
rubber materials.
DANGER: When servicing or repairing a
temperature control unit, the possibility of
serious or even fatal injury from electrical
shock exists. Extreme care must be used
when working with a refrigeration unit
that is connected to a source of operating
power, even if the unit is not operating.
Lethal voltage potentials can exist at the
unit power cord, inside the control box, at
the motors and within the wiring
harnesses.
WARNING: Make sure the unit On/Off
switch is turned Off before connecting or
disconnecting the standby power plug.
Never attempt to stop the unit by
disconnecting the power plug.
WARNING: Make sure the unit power
plug is clean and dry before connecting it
to a power source.
WARNING: Do not make rapid moves
when working on high voltage circuits in
refrigeration units. Do not grab for falling
tools because you might accidentally touch
a high voltage source.
WARNING: Use tools with well insulated
handles. Never hold uninsulated metal
tools near exposed, energized conductors.
WARNING: Treat all wires and
connections as if they were high voltage
until a meter and wiring diagram indicate
otherwise.
WARNING: Never work alone on high
voltage circuits in the refrigeration unit.
Another person should be nearby to shut
off the unit and provide aid in the event of
an accident.
WARNING: Safety glasses, rubber-
insulated gloves and cable cutters should
be near your work area, in the event of an
electrical accident.
WARNING: Use caution when working
with electrical circuits that contain
capacitors. Some capacitors hold a
significant charge that might cause burns
or shocks if accidentally discharged. Make
sure capacitors are discharged before
working on electrical circuits.
WARNING: Control circuits used in
refrigeration units are low voltage (12 to
24 volts dc). This voltage is not dangerous,
but the large amount of amperage
available from the alternator can cause
severe burns if accidentally shorted to
ground with metal objects, such as tools.
WARNING: Do not wear jewelry, watches
or rings because they increase the risk of
shorting out electrical circuits and
damaging equipment or causing severe
burns.
Summary of Contents for SPECTRUM TS 30 SR NAD
Page 4: ...4 ...
Page 10: ...Table of Contents 10 ...
Page 20: ...Safety Precautions 20 ...
Page 51: ...Unit Description 51 Figure 19 Front View Figure 20 Back View AJA1350 AJA1500 ...
Page 52: ...Unit Description 52 1 On Off Switch Figure 21 Side View 1 ...
Page 60: ...Unit Description 60 ...
Page 80: ...SPECTRUM TS Operation 80 ...
Page 90: ...Electrical Maintenance 90 ...
Page 100: ...Engine Maintenance 100 Figure 130 Early TK 3 95 Fuel and Oil System Components ...
Page 102: ...Engine Maintenance 102 Figure 131 Late TK 3 95 Fuel and Oil System Components ...
Page 104: ...Engine Maintenance 104 Figure 132 TK376 Fuel and Oil System Components ...
Page 136: ...Refrigeration Maintenance 136 ...
Page 156: ...Hilliard Clutch Maintenance 156 ...
Page 158: ...Structural Maintenance 158 ...
Page 168: ...Remote Evaporator Specifications 168 ...
Page 170: ...Remote Evaporator Maintenance Inspection Schedule 170 ...
Page 176: ...Remote Evaporator Electrical Maintenance 176 ...
Page 180: ...Remote Evaporator Refrigeration Service Operations 180 ...
Page 182: ...Remote Evaporator Structural Maintenance 182 ...
Page 184: ...Remote Evaporator System Diagnosis 184 ...
Page 188: ...Wiring and Schematic Diagrams Index 188 ...
Page 189: ...189 Wiring Diagram Page 1 of 4 ...
Page 190: ...190 Wiring Diagram Page 2 of 4 ...
Page 191: ...191 Wiring Diagram Page 3 of 4 ...
Page 192: ...192 Wiring Diagram Page 4 of 4 ...
Page 193: ...193 Schematic Diagram Page 1 of 3 ...
Page 194: ...194 Schematic Diagram Page 2 of 3 ...
Page 195: ...195 Schematic Diagram Page 3 of 3 ...
Page 196: ...196 ...