Carrier 69NT40-521 manual Removal, Controller/Datacorder, Handling of Controller/DataCORDER

NOTE

Suction pressure must be 0.5 kg/cm@ (6 psig) below valve maximum operating pressure (M.O.P.). Example: if valve rated at 55 MOP, suction pressure must be below this MOP. Recommended pressure is below 3.44 kg/cm@ (49 psig).

6.27 CONTROLLER/DATACORDER

a. Handling of Controller/DataCORDER

These guidelines should be followed when handling the Controller/DataCORDER module. These steps should be implemented when replacing the module, when doing any arc welding on the unit, or when service to the refrigeration unit requires handling and removal of the Controller.

CAUTION

Remove Controller/DataCORDER module and unplug all connectors before performing any arc welding on any part of the container.

6.Upon completion of your service work, put the wrist strap back on, and re-install the module into the refrigeration unit.

b.Removing and Installing the Controller/DataCORDER Module

Removal:

1.Disconnect all front wire harness connectors (MA, MB, MC, KA & KB) and move wiring out of way.

2.Loosen one mounting screw (see Figure 6-31, item 1) and pull out the top of the module (item 2). Lift up and out.

3.Turning the module around will give access to the two back connectors (EC) which can be disconnected. Remove module.

4.Remove the new Controller/DataCORDER module from its packaging and install it in the refrigeration unit. Place the old module into the same packaging that accompanied the new module. Make sure that you package it in the exact manner that you received it.

Do not remove wire harnesses from modules unless you are grounded to the unit frame with a static safe wrist strap.

1.Obtain a grounding wrist strap and a static dissipation mat. The wrist strap, when properly grounded, will dissipate any potential buildup on the body. The dissipation mat will provide a static-free work surface on which to place and/or service the Controller/DataCORDER module.

NOTE

Use a dissipation mat, order CTD P/N 07-00277-00.

2.Disconnect and secure power to the unit.

3.Place strap on wrist and attach the ground or clip end of the wrist strap to any exposed unpainted metal area on the refrigeration unit frame (bolts, screws, etc.).

4.Carefully remove the Controller/DataCORDER. Do not touch any of the electrical components if possible. Place the module on the static mat.

5.If you are servicing the refrigeration unit, you are free to remove the ground strap from your wrist and complete your work.

T-268-07 6-28

4 1 2 3

1.Mounting Screw

2.Controller/DataCORDER Module

3.Test Points

4.Controller/DataCORDER Software Programming Port

Figure 6-31. Controller side of the Control Box