Mitsubishi Electric Mr.Slim SUZ-M-VA-ER Series Installation Manual page 14

■ The serial number is indicated on the SPEC NAME PLATE.
P
Sequential number for each unit: 00001–99999
P (Product code of outdoor)
Month of manufacture: 1, 2, 3, 4, 5, 6, 7, 8, 9, X (10), Y (11), Z (12)
Year of manufacture (western calendar) : 2015 → 5, 2016 → 6