# If the frequency light is flashing & the unit can only be operated by the forced operations button.
The “Memory Module PCB” could be faulty.
Refer attached photo’s
Note:
There is no real way of isolating this Memory Module PCB & testing it, apart from replacing the
indoor control box assembly. As this component is not available as a induvial component.
Location of Memory Module PCB
(Indoor control box assembly)
Page 4 KSSSI90