Thermo King CSR Series User Manual

Safety Precautions
15
Low Voltage
Control circuits are low voltage (24 Van and 12
Vdc). This voltage potential is not considered
dangerous, but the large amount of current
available (over 30 amperes) can cause severe
burns if shorted to ground. Do not wear jewelry,
watch or rings. These items can shortcut electrical
circuits and cause severe burns to the wearer.
Servicing Units (or Containers)
Equipped with a
Microprocessor Controller
Precautions must be taken to prevent electrostatic
discharge when servicing the MP-3000
microprocessor and related components. If these
precautionary measures are not followed, the risk
of significant damage to the electronic
components of the unit is possible. The primary
risk potential results from the failure to wear
adequate electrostatic discharge preventive
equipment when handling and servicing the
controller. The second cause results from electric
welding on the unit and container chassis without
taking precautionary steps.
Controller Repair
When servicing the controller, it is necessary to
ensure that electrostatic discharges are avoided.
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. Disconnect all power to the unit.
2. Avoid wearing clothing that generates static
electricity (wool, nylon, polyester, etc.).
3. Do wear a static discharge wrist strap (refer to
Tool Catalog) 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.
4. Avoid contacting the electronic components
on the circuit boards of the unit being
serviced.
5. Leave the circuit boards in their static proof
packing materials until ready for installation.
6. 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.
7. 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
Whenever electric welding is to be performed on
any portion of the refrigeration unit, container or
container chassis with the refrigeration unit
attached, it is necessary to ensure that welding
currents are not allowed to flow through the
electronic circuits of the unit. These procedures
must be rigidly adhered to when servicing these
units to avoid damage or destruction.
1. Disconnect all power to the refrigeration unit.
2. Disconnect all quick-disconnect wire
harnesses from the back of the controller.
3. If the unit is equipped with an Remote
Monitor Modem (RMM), disconnect all wire
harnesses from the RMM.
4. Switch all of the electrical circuit breakers in
the control box to the O
FF position.
5. 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 the likelihood of
stray welding currents passing through any
electrical or electronic circuits.
6. When the welding operation is completed, the
unit power cables, wiring and circuit breakers
must be restored to their normal condition.

Thermo King CSR Series Specifications

General

Brand	Thermo King
Model	CSR Series
Category	Refrigerator
Language	English