Daikin R410As Service Manual page 104

Si39-302
6.1.3 When the Float Switch is Tripped During Heating Operation:
During heating operation, if the float switch is not reset even after the 5 minutes operation, 5
seconds stop, 5 minutes operation cycle ends, operation continues until the switch is reset.
6.1.4 When the Float Switch is Tripped and "AF" is Displayed on the
Remote Controller:
Note: If the float switch is tripped five times in succession, a drain malfunction is determined to have
occurred. "AF" is then displayed as operation continues.
Function
Outline of Control (Indoor Unit)
93