9 To set the clock1. Press “CLOCK button”.is displayed.blinks.2. Press “TIMER setting button”to set the clock to the presenttime.Holding down “ ” or “ ” button rap-idly increases or decreases the time dis-play.3. Press “CLOCK button”.blinks. Turn the breaker ON• Turning ON the breaker opens the flap,then closes it again. (This is a normalprocedure.)NOTE Tips for saving energy• Be careful not to cool (heat) the room too much.Keeping the temperature setting at a moderate level helps save energy.• Cover windows with a blind or a curtain.Blocking sunlight and air from outdoors increases the cooling (heating)effect.• Clogged air filters cause inefficient operation and waste energy. Clean them once in about every two weeks. Please note• The air conditioner always consumes 15-35 watts of electricity even while it is not operating.• If you are not going to use the air conditioner for a long period, for example in spring or autumn, turn the breaker OFF.• Use the air conditioner in the following conditions.• Operation outside this humidity or temperature range may cause a safety device to disable the system.CTEMPON/OFFPOWERFULMODETIMERFANON CANCELOFF 1.32SWINGRecommended temperature settingFor cooling:26°C – 28°CFor heating:20°C – 24°CMode Operating conditions If operation is continued out of this rangeCOOL Outdoor temperature: –10 to 46 °CIndoor temperature: 18 to 32 °CIndoor humidity: 80% max.• A safety device may work to stop the operation.(In multi system, it may work to stop the operation of the outdoor unit only.)• Condensation may occur on the indoor unit and drip.HEAT Outdoor temperature: –15 to 21 °CIndoor temperature: 14 to 28 °C • A safety device may work to stop the operation.DRY Outdoor temperature: –10 to 46 °CIndoor temperature: 18 to 32 °CIndoor humidity: 80% max.• A safety device may work to stop the operation.• Condensation may occur on the indoor unit and drip.

Safety precautions

installation site

Names of parts

i outdoor unit

remote controller

Preparation Before Operation

OPERATION

Adjusting the Air Flow Direction

POWERFUL Operation

TIMER Operation

Care and Cleaning

i air filter

before a long idle period

Trouble Shooting

check again

call the service shop immediately

fault diagnosis

Daikin FTS50BVMB Operation Manual

indoor units

dc fan lock

high pressure control in cooling

and outdoor units

fan motor connector output check

electronic expansion valve check

four way valve performance check

thermistor resistance check

installation condition check

discharge pressure check

power supply waveforms check

capacitor voltage check

main circuit electrolytic capacitor check

hall ic check

FTS50BVMB

Part 1 List of Functions ................................................................ 1