What does Parker Hannifin error code HT mean?

Error code HT on Parker Hannifin equipment indicates high discharge temperature — check superheat settings. Refer to the Parker Hannifin service manual for specific diagnostic steps and safety precautions before troubleshooting.

How do I reset a Parker Hannifin unit after a fault?

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

Where can I find Parker Hannifin service manuals and documentation?

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

Refrigeration

Parker Hannifin error codes, decoded.

Look up any Parker Hannifin fault code below. Each one is grounded in Parker Hannifin'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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Parker Hannifin sits in our Refrigeration coverage. Every page here is transcribed from the manufacturer's manuals, not scraped from forums.

What error codes does Parker Hannifin display?

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

High discharge temperature — check superheat settings

Compressor overload — check motor current draw

Oil failure — check oil level and pump pressure

Low pressure fault — check evaporator and expansion valve

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Common questions about Parker Hannifin equipment

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