LG Therma monoblock heat pump WiFi module

[Boy1925]

I have an LG Therma heat pump which was installed three years ago without the optional wifi module.

i would like to fit that module and wonder if anybody here knows if if there is only one such module or if I need to match my wired control unit to a specific wifi module?

I have seen a WiFi module referred to as for aircon units but I’m not sure if that is the correct one. The reference number is 

PWFMDD200. If anyone knows a reasonably priced source that would also assist.