Revision: 01
Date: 17/12/2025
Applicable to: All E4 model variants
Serial no: All commencing 2512....
Changes to technical build specification including -
a) New version 3.6 Main Board
b) Control firmware Iss_ 10, operationally featuring -
i) 90 sec compressor start delay on powering up unit
ii) Cold temp on set point revised to +5C
iii) Minimum compressor off time 320sec
iv) Maximum compressor on time 4hrs
v) Other minor bug fixes
c) New ePTC type compressor starting device (complete with overload protector)
Note: This new build specification aligns new production units with same features as recent field upgrade kits 721028 (hardware) and 721029 (firmware) and all according to the relevant BO241025.E4.EN.01 instructions issued with those.
