Figure 7.18 Autotransformer - Carrier PrimeLINE Operation And Service Manual

Container refrigeration units

Table of Contents

1) Circuit Breaker (CB-2) 230-Volt

2) 460 VAC Power Receptacle

7.27 Controller Service

Do not remove wire harnesses from circuit boards unless you are grounded to the unit frame

with a static safe wrist strap or equivalent static drain device.

Remove the controller module and unplug all connectors before performing any arc welding on

any part of the container.

Do not attempt to use an ML2i PC card in an ML3 equipped unit. The PC cards are physically

different and will result in damage to the controller.

Do not attempt to service the controller modules. Breaking the seal will void the warranty.

7.27.1

Controller Module Handling

The guidelines and cautions provided herein should be followed when handling the modules. These precautions

and procedures should be implemented when replacing a module, when doing any arc welding on the unit, or when

service to the refrigeration unit requires handling and removal of a module.

1. Obtain a grounding wrist strap (Carrier Transicold P/N 07-00304-00) and a static dissipation mat (Carrier

Transicold P/N 07-00277-00). The wrist strap, when properly grounded, will dissipate any potential static

buildup on the body. The dissipation mat will provide a static-free work surface on which to place and/or

service the modules.

2. Disconnect and secure power to the unit.

3. Place strap on wrist and attach the ground end to any exposed unpainted metal area on the refrigeration

unit frame (bolts, screws, etc.).

4. Carefully remove the module. Do not touch any of the electrical connections if possible. Place the module

on the static mat.

The strap should be worn during any service work on a module, even when it is placed on the mat.

T-362