Mitsubishi Electric Mr.SLIM PKH-1.6FKA Technical & Service Manual page 36

(2) Indoor fan control
Indoor fan speed LOW/HIGH depends on the remote controller setting.
However, if an outdoor unit abnormality is detected, the indoor fan speed will be LOW, regardless of the remote controller
setting.
When the outdoor unit abnormality detection is released and the fan speed returns to the set speed, the quiet cycle control
will work.
(a) Normal control
( i ) Fan speed LOW/HIGH depends on the remote controller setting regardless of the thermostat ON/OFF.
(ii) Fan speed will remain on LOW if an abnormality in outdoor unit is detected. (5 minutes)
When the abnormality detection is released, the fan speed returns to the set speed.
5 minutes
SET
LOW
1 2
NOTE 1 : Fan stops immediately if the unit stops or the check mode is started.
5 minutes
SET
LOW
OFF
1 3
36
1 Start-up of outdoor unit abnormality detec-
tion.
2 Release of outdoor unit abnormality detec-
tion.
3 Unit stop due to outdoor unit abnormality
with P8 indication.