Carrier 42LUVH055N Service Manual page 28

The machine has run for 10 minutes in defrosting.
8.7.7 Defrosting action
on
compressor
off
nn
on
4-way valve
off
on
outdoor fan
off
on
indoor fan
off
indoor fan breeze 10s
8.7.8 Rating capacity test function
Set the indoor unit with remote controller as: high fan, 30℃ in heating mode, then press "TURBO" button on controller 6
times or more within 10 seconds(make sure indoor unit receives these signals), the machine will turn into rating capacity
test mode, the buzzer will make a "di" sound for 2 seconds continuously. Also, indoor fan will change to rating speed, the
frequency of compressor will be fixed as rating value. Any condition of above is not satisfied, the machine can not be
turned into rating capacity test mode.
The machine will quit from the rating capacity test mode if running for 5 hours or changing fan speed or setting
temperature.
8.7.9 Turbo function in heating mode
Elevate current frequency (excluding F8) to a higher grade. If indoor fan is in low speed or pause caused by defrosting or
anti-cold-wind function, frequency of compressor will not be elevated one grade until these limit has been released.
Indoor fan changes to turbo speed and anti-cold-wind function is valid.
After running for 30 minutes the machine will turn back to previous setting mode.
F
8
90s
100s
no longer than 10 minutes
25
30s