Thermo King SGCO 3000, Руководство пользователя

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Safety Precautions
17
General Safety Precautions for
Servicing Units (or Containers)
Equipped with a
Microprocessor Controller
Precautions must be taken to prevent electrostatic
discharge during service of the SG+
microprocessor controller and related
components. The risk of significant damage to the
electronic components of the unit is possible If
these precautionary measures are not followed.
The primary risk potential results are as follows:
• The failure to wear adequate electrostatic
discharge preventive equipment when
handling and servicing the controller.
• Electric welding on the unit and/or container
chassis without taking precautionary steps.
Controller Repair
It’s necessary to ensure that electrostatic
discharges are avoided when servicing the
controller. Potential differences considerably
lower than those which produce a small spark
from a finger to a door knob can severely damage
or destroy solid-state integrated circuit
components. The following procedures must be
rigidly adhered to when servicing these units to
avoid controller damage or destruction.
1. Turn the generator set OFF.
2. Disconnect the negative terminal of the
battery. Disconnect the cable end that is away
from the battery.
3. Avoid wearing clothing that generates static
electricity (wool, nylon, polyester, etc.).
4. Wear a static discharge wrist strap (TK P/N
204-622) with the lead end connected to the
controller's ground terminal. These straps are
available at most electronic equipment
distributors. DO NOT wear these straps with
power applied to the unit.
5. Avoid contacting the electronic components
on the unit circuit boards.
6. Leave the circuit boards in their static proof
packing materials until ready for installation.
7. If a defective controller is to be returned for
repair, it should be returned in the same static
protective packing materials from which the
replacement component was removed.
8. After servicing the circuit board and any other
circuits, the wiring should be checked for
possible errors before restoring power.
Welding of Units or Containers
It is necessary to ensure that welding currents are
NOT allowed to flow through the electronic
circuits of the unit. This includes whenever
electric welding is to be performed on any portion
of the generator set, container or container chassis
with the generator set attached. These procedures
must be rigidly adhered to when servicing these
units to avoid damage or destruction.
1. Disconnect all power to the generator set.
2. Disconnect all wire harnesses from the
microprocessor.
3. Switch all of the electrical circuit breakers in
the control box to the OFF position.
4. Weld unit and/or container per normal
welding procedures. Keep ground return
electrode as close to the area to be welded as
practical. This will reduce stray welding
currents passing through any electrical or
electronic circuits.
5. When the welding operation is completed, the
unit power cables, wiring and circuit breakers
must be restored to their normal condition.
Safety Do’s and Don’ts
DO:
• Do perform your tasks carefully, without
undue haste.
• Do provide a fire extinguisher (rated ABC).
•
Do
provide a First Aid kit (for bums and
abrasions). Obtain medical attention.
•
Do
use the correct tools for the job you are
doing.
•
Do
make sure that all fasteners are secure.