What does Ranco error code OL mean?

Error code OL on Ranco equipment indicates compressor overload — check motor current draw. Refer to the Ranco service manual for specific diagnostic steps and safety precautions before troubleshooting.

How do I reset a Ranco unit after a fault?

To reset a Ranco unit, first resolve the root cause of the alarm. Then power cycle the unit or press the reset button on the controller. For Ranco systems with digital controllers, navigate to the fault log and clear active alarms. Never reset without investigating the cause.

Where can I find Ranco service manuals and documentation?

Official Ranco service manuals are available through authorised distributors and the Ranco technical support portal. AskWhiz provides instant AI-powered access to Ranco troubleshooting information via WhatsApp — no manual hunting required.

Refrigeration

Ranco error codes, decoded.

Look up any Ranco fault code below. Each one is grounded in Ranco's own service documentation — the meaning, the symptoms, the causes, and the steps to clear it.

By Octavian Ghindea

Co-founder & CTO · Reviewed August 2026

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Ranco sits in our Refrigeration coverage. Every page here is transcribed from the manufacturer's manuals, not scraped from forums.

What error codes does Ranco display?

Tap a code for the full breakdown — meaning, symptoms, causes, and fix steps.

Compressor overload — check motor current draw

High pressure fault — check condenser and refrigerant charge

Low pressure fault — check evaporator and expansion valve

Communication fault — check wiring and addresses

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Common questions about Ranco equipment

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