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Slim R410a
18-08-2010, 12:17 PM
AUY18RG 5kw compact cassette. (R22)

Runs fine in cooling for about 20mins to 1hour then timer (green) light blinks fast continuosly and the operation (red) light flashes 4 times then a pause.

Any one have fault codes for these units?

Cheers,

bigor_2
18-08-2010, 01:48 PM
Float switch error.

Slim R410a
18-08-2010, 02:44 PM
Thanks for that. Probable cause = blocked drain?

The unit is installed in a hair salon, filters get cleaned occassionally by owner but fan blades and coil were coated in dirt/hair product.

bigor_2
18-08-2010, 03:06 PM
If it so it is necessary to disassemble the indoor unit and wash coil; fan blades; drain pan; drain hose. And as the external drainage pipeline.