Air filter choke up indication

[sachin230]

We have Daikin VRVIII system

Can anyone explain,
1) How ceiling mounted indoor unit identify the air filter choke up & give indicaiton.What is the logic behind it.
Is it depend on suction air or fan current ?.

2) How A/c system identify the all type of faultcode .where can I get information about this logic /interlock?

[refaircon]

doesnt it go on run hours

[Pauly.]

indoorfan running hours isnt it?

[james10]

like the rest it's on run hours you can change the time period or remove it all together

[Brian_UK]

Purely on run hours which can be adjusted to suit the usage of the unit.

Personally I switch off that function in maintained offices as it only raises silly call-outs.

[lana]

Hi there,

If air filter is blocked the air flow will reduce. If air flow over the evaporator is reduced (for any reason), then air temperature difference (in and out) will increase. Also you will see frost on the surface of the evaporator coil.

This is a fairly simple fault do diagnose.

Cheers

[sachin230]

How system identify the faultcode.where can I get information about this logic /interlock.

[Brian_UK]

How system identify the faultcode.where can I get information about this logic /interlock.

Read replies given above !

[sachin230]

sorry,
My question is not clear to understand.Now edited

[Brian_UK]

OK, the only information that most of us use is the manufacturer's service manuals, these explain the fault signals and the way to interpret them.