Daikin U4 fault, power down and reboot sequence

[ICEmarc]

What is the procedure for powering down then powering up a daikin vrv system

Also how long does the boot up sequence take?

[VRVIII]

Hi,
What is the unit model number? If the unit is K, L, M or P series, switch off indoors at controllers then switch off mains power.

Switch on mains power and wait for H2P LED on the outdoor unit pcb to change from flashing (initialising) to off, usually takes about 10~15min.

[ICEmarc]

do you power the indoor units down first? And is the condensor or indoor units powered up first?

Hi,
What is the unit model number? If the unit is K, L, M or P series, switch off indoors at controllers then switch off mains power.

Switch on mains power and wait for H2P LED on the outdoor unit pcb to change from flashing (initialising) to off, usually takes about 10~15min.

[VRVIII]

do you power the indoor units down first? And is the condensor or indoor units powered up first?

Hi,

When switching off - It makes no difference but switch off at controllers first.

When applying power - Indoors & BS boxes first then outdoor. However it wouldn't make any difference providing you switch outdoor mains off/on when you have power to all connected indoors (& BS boxes if heat recovery).