Pioneer YN020GMFI22M2D Installation Manual page 16

Wiring Figure
CAUTION
Connect the connective cables to the terminals as identified with their respective matched
numbers on the terminal block of indoor and outdoor units. For example, see the following US
models: Terminal L1 of outdoor must connect with terminal L1 on the indoor unit. Do Not Invert.
Some indoor units terminals are marked as 1-2-3-G
Some outdoor units terminals are marked as 1-2-3-G
NOTE: please refer to the following figures, for different available terminal blocks.
please run the main power cord through the lower line-outlet of the cord clamp.
TWO ZONE models:
 
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Some indoor units terminals are marked as L1-L2-S-G
Some outdoor units terminals are marked as L1-L2-S-G
Model AA
Model BB
Magnetic ring ( not supplied, optional part)
(Used to slip on the connecting cable of indoor
and outdoor units after installation.)
Model AB
Model BA