What does Bitzer error code E01 mean?

Error code E01 on Bitzer compressors indicates a high-pressure cutout. Check the discharge pressure against the maximum allowable pressure for your refrigerant, inspect the condenser for fouling or airflow restrictions, and verify the condenser fan motor is operating correctly.

How do I reset a Bitzer compressor after a fault?

After resolving the root cause, press and hold the reset button on the Bitzer control module for 3 seconds. For Bitzer CRII models with SABB, navigate to the fault log in the display and clear active faults. Always identify and fix the underlying fault before resetting to prevent repeated trips.

What causes a Bitzer screw compressor to trip on high discharge temperature?

High discharge temperature (E03) on Bitzer screw compressors is commonly caused by insufficient oil injection, a blocked oil separator, high compression ratio due to low suction pressure, or loss of economiser function. Check oil level and injection nozzles first, then verify suction pressure is within rated parameters.

How do I read the Bitzer LOGVIEW fault history?

Connect LOGVIEW software to the Bitzer CRII controller via RS485 or USB adapter. Navigate to the Fault History tab to see timestamped fault events with operating conditions at time of trip. This data is invaluable for diagnosing intermittent faults and trending compressor health.

What oil should I use in a Bitzer compressor with R404A?

Bitzer recommends BSE 55 or BSE 170 polyolester (POE) oil for R404A applications. Always use the viscosity grade specified on the compressor nameplate. POE oils are hygroscopic — keep containers sealed and replace oil if moisture contamination is suspected.

What is the correct superheat setting for a Bitzer reciprocating compressor?

Bitzer recommends 10-15K superheat at the compressor suction port for reciprocating models under normal operating conditions. Lower superheat risks liquid slugging; higher superheat increases discharge temperature and reduces efficiency. Use a digital manifold gauge set for accurate measurement.

refrigeration

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Common Bitzer Error Codes

E01

High pressure cutout — check condenser and refrigerant charge

E02

Low pressure cutout — check suction pressure and refrigerant levels

E03

High discharge temperature — check oil injection and compression ratio

E04

Motor overload / winding temperature — check motor current and cooling

E05

Oil pressure differential fault — check oil pump and separator

Frequently Asked Questions — Bitzer

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