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The H70 error on a heat pump usually indicates a communication or control board issue, but the exact meaning depends on the brand and model of your unit.
H70 indicates a fault in the overheat protection plate of the heating element in the indoor unit.
This happens when there is no power supply to the indoor unit (“Power Supply 2”) when the booster heater starts, or when the safety heating circuit (OLP) is open.
Possible causes
A faulty power connection to the heating terminals of Power Supply 2.A blown electrical installation / heater circuit, causing the heating element to fail.
Chapter AI
Three things that actually matter in production
Reliable answers, not statistical guesses
Standard AI guesses the next word. Our infrastructure maps the actual relationships between your machine parts, PLC error codes, and schematics. Responses are grounded only in your specs.
Works with the data you already have
No need to reformat your documentation. Connect your existing manuals, training videos, and technical specs. Your agents update automatically in the background when your documentation changes.
Traceable by design
An AI answer without a source is useless on the shop floor. Every response comes with precise visual citations so your field engineers can verify the exact page or video timestamp instantly.
Testimonials
Some previous feedback we received
When a customer calls, I immediately open Chapter and type in the question while I’m still on the line. And it quickly gives me an answer.
Since we have two systems (CRM and performance system), it’s great that Chapter AI provides a single source of information.
He came up with an answer that really made me happy. The information came from different documents, and he had put it together neatly.
When our installers encounter installation questions or error codes in the field, they need instant access to accurate, Solvis-specific procedures, not generic heating advice.
When we encounter an unexpected error in the field, instant access to shared solutions makes all the difference. Instead of waiting for someone to find and share the fix, it’s available right away. It’s heaven. It’s great.
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