Honda EU22i Manuel De L'utilisateur page 36

4. Start the engines and make sure the Output indicators (green) come
ON.
5. Confirm that the appliance to be used is switched off, and plug in
the appliance.
6. Switch on the equipment to be used.
Parallel operation with EU20i
For instructions on how to connect the parallel operation cable, refer
to pages 30 through 33.
An EU22i generator may only be connected to EU20i generator that
have specific frame serial numbers. Refer to the table below to
confirm that your EU20i generator is compatible with an EU22i.
Model Frame Serial Number Range
EAAJ-2032188 and later
EU20i
EACT-1000001 and later
OUTPUT INDICATOR
(GREEN)
33