Mitsubishi Electric M Series Manual page 191

M series
MSZ-HC25VA MSZ-HC35VA MSZ-HC35VAB
MUZ-HC25VA MUZ-HC35VA MUZ-HC35VAB
WALL-MOUNTED Inverter Heat Pump
Install the unit horizontally.
Do not use drain socket (6) in cold regions.
Drain may freeze and make the fan stop.
The outdoor unit produces condensate during the heating operation.
Select the installation place to ensure to prevent the outdoor unit and/or
the grounds from being wet by drain water or damaged by frozen drain
water.
C-189