7–33
T-372
7.27.8
Removing and Installing a Controller
Removal:
1. Disconnect all front wire harness connectors and move wiring out of the way.
2. The lower controller mounting is slotted. Loosen the top mounting screw (see
) and lift up and out.
3. Remove the module.
4. When removing the replacement module from its packaging, note how it is packaged. When returning the
old module for service, place it in the packaging in the same manner as the replacement. The packaging
has been designed to protect the module from both physical and electrostatic discharge damage during
storage and transit.
Installation:
1. Install the module by reversing the removal steps.
2. Torque values for mounting screws (see
) are 0.23 mkg (20 inch-pounds). Torque value for the
connectors is 0.12 mkg (10 inch-pounds).
7.27.9
Battery Replacement
The Carrier rechargeable battery pack part # is 79-04262-01.
1. Turn unit power Off and disconnect the power supply.
2. Open the control box door and remove both the high voltage shield and clear plastic rain shield (if installed).
3. Disconnect the battery connection at the "BA" connector and carefully remove wire ties along the battery
wires leading back to the battery pack.
4. Using a Driver Bit, Carrier Transicold part number 07-00418-00, loosen the left hand screw on the battery
pack cover then remove the second screw on the outer edge of the battery pack cover.
5. Remove the old battery from the bracket and assemble the new battery to the bracket.
6. Secure the battery wires from the battery along the previous route and then reconnect the BA connector.
Heat shrink a ferrite clamp to the harness to reduce electromagnetic voltage transients onto this interface.
