Fault Codes / Bitzer / 3500

BI

Bitzer 3500

Critical

ECOLINE / IQ Module — Oil level low

Bitzer 3500: Oil level low This fault typically halts operation and needs immediate attention.

Possible causes

Oil shortage / poor return
Faulty oil level sensor (OLC-D1)

Check steps

Check sight-glass oil, top up if needed
Check/replace OLC-D1

Affected parts

Ölniveauwächter OLC-D1
Verdichteröl

Safety note

Low oil → bearing damage; do not bypass.

Source: Bitzer CM-RC-01 Reference Manual s.27 — 3500='Oil Level Low'

Reviewed by Anıl Güzeldemir — in the refrigeration machine room since 2006, developer of Enthalio.

Look up in Enthalio →

Related fault codes

Motor temperature high4301 High pressure switch tripped3431 Suction pressure low3400 Discharge temperature sensor fault7308 PTC motor winding sensor fault / sensor cold.4302 High pressure switch tripped.4321