Battery Replacement; 7.25 Temperature Sensor Service - Carrier 69NT40-561-399 Operation And Service Manual

Installation:
Install the module by reversing the removal steps.
Torque values for mounting screws (see
nectors is 0.12 mkg (10 inch-pounds).
7.24.6

Battery Replacement

Standard Battery Location (Standard Cells):
1. Turn unit power OFF and disconnect power supply.
2. Slide bracket out and remove old batteries. (See
3. Install new batteries and slide bracket into control box slot.
Use care when cutting wire ties to avoid nicking or cutting wires.
Standard Battery Location (Rechargeable Cells):
1. Turn unit power OFF and disconnect power supply.
2. Disconnect battery wire connector from control box.
3. Slide out and remove old battery and bracket. (See
4. Slide new battery pack and bracket into the control box slot.
5. Reconnect battery wire connector to control box and replace wire ties that were removed.
Secure Battery Option (Rechargeable Cells Only):
1. Turn unit power OFF and disconnect power supply.
2. Open control box door and remove both the high voltage shield and clear plastic rain shield (if installed).
3. Disconnect the battery wires from the "KA" plug positions 14, 13, 11.
4. Using Driver Bit, Carrier Transicold part number 07-00418-00, remove the 4 screws securing the display
module to the control box. Disconnect the ribbon cable and set the display module aside.
5. Remove the old battery from the bracket and clean bracket surface. Remove the protective backing from the
new battery and assemble to the bracket. Secure battery by inserting the wire tie from the back of the
bracket around the battery, and back through the bracket.
6. Reconnect the ribbon cable to display and re-install the display.
7. Route the battery wires from the battery along the display harness and connect the red battery wire and one
end of the red jumper to "KA14," the other end of the red jumper wire to "KA11," and the black wire to
"KA13."
8. Replace wire ties that were removed.

7.25 TEMPERATURE SENSOR SERVICE

Service procedures for the return recorder, return temperature, supply recorder, supply temperature, ambient,
defrost temperature, evaporator temperature, and compressor discharge temperature sensors are provided in the
following sub paragraphs.
Figure 7.21) are 0.23 mkg (20 inch-pounds). Torque value for the con-
Figure
CAUTION
!
The battery wires must face toward the right.
7–33
4.4, Item 8.)
Figure 4.4, Item 8.)
T-365