Replacing NTC resistor - AWS310 - AWS310-SITE - AWS810 - AWS810-SOLAR - BMU801

BMU801 User Guide
Document code
M212710EN
Revision
B
Language
English
Product
AWS310
AWS310-SITE
AWS810
AWS810-SOLAR
BMU801
Document type
User guide
1.5‑mm flat head screwdriver

Replace the NTC resistor when replacing BMU801 or if the resistor is broken.

If you have 2 batteries, replace the NTC resistor first for one battery, then for the other.

  1. Detach the battery connector from BMU801.
    1
    Battery 1 connector
    2
    NTC resistor for battery 1
    3
    NTC resistor for battery 2
    4
    Battery 2 connector
  2. To detach the NTC resistor:
    1. Insert a 1.5‑mm flat head screwdriver in the slot next to the resistor wire in the NTC connector.
    2. Push the screwdriver to the bottom of the slot and, at the same time, pull the wire out of the connector with your other hand.

      Repeat for the other wire.

  3. Disconnect the other end of the NTC resistor from the battery.
    1
    Screw
    2
    Spring washer
    3
    Flat washer
    4
    NTC temperature resistor
    5
    Connector
    6
    Battery
  4. Attach the wires of the new NTC resistor to BMU801.
  5. Connect the other end to the battery.

    Make sure that you connect the battery cable and the corresponding NTC resistor cable to the same battery:

    • Battery cable from BMU801 connector Batt 1 and the NTC cable next to it to the first battery.
    • Battery cable from BMU801 connector Batt 2 and the NTC cable next to it to the second battery (if you have a second battery in the system).
    1
    Battery and NTC connectors in BMU801
    2
    Battery 1
  6. Reattach the battery connector to BMU801.