Philips WH-UD16CE5-A-1 Service Manual page 58

11.4.7 Disposal of Outdoor Unit Drain Water

When a Drain elbow 2 is used, please ensure to follow below:
- the unit should be placed on a stand which is taller than 50 mm.
- cover the 8 holes (ø20 mm) with Rubber cap 0 (refer to illustration below)
- use a tray (field supply) when necessary to dispose the outdoor unit drain water.

If the unit is used in an area where temperature falls below 0°C for 2 or 3 consecutive days, it is recommended
not to use the Drain elbow 2 and Rubber cap 0, for the drain water freezes and the fan will not rotate.
58