H17 on a Panasonic heat pump: Zone 2 pump error
Short answer
On a Panasonic heat pump, H17 means: Zone 2 pump error. The heat pump keeps running with some functions stopped. An engineer is needed to fix the cause.
Reviewed 23 September 2026 · 1 source
What it means
The manual says: Zone 2 pump error.
Part involved: Zone 2 circulation pump.
When it shows: Not stated in the documents opened.
Likely causes:
- Not stated in the documents opened.
Is it safe?
| Does the heat pump stop? | Partly |
|---|---|
| Severity | Fault — needs a manual reset once the cause is fixed |
| Engineer needed? | Yes |
The heat pump keeps running with some functions stopped.
Resetting itself: Not stated in the Panasonic documents opened; protection counters lock out after the stated number of occurrences.
Manual reset: User: 'Error Reset' in the remote-controller Quick Menu (H/J/K/L controllers) or OFF/ON; engineer must clear the underlying cause (service manuals: 'When error happens, the power has to be reset').
What you can check
- Read and note the code shown blinking on the remote controller (also stored under System Check > Error history). Per the Panasonic operating instructions the user may switch the system OFF/ON at the remote controller and use 'Error Reset' in the Quick Menu; if the code returns, leave the system and contact the installer (UK user guide lists Panasonic technical support as the fallback).
What the engineer will check
- Check zone 2 pump supply, wiring and feedback; check zone 2 pump for seizure/air; check indoor/zone PCB.
Who to ask for: Heat pump / heating engineer (hydraulics).
Certification: None statutory for water-side work; G3 unvented-cylinder competence if cylinder safety devices are involved.
What you might notice
Sources
- Manuals+ rendering of Panasonic Operating Instructions WH-WXG09/12/16ME8 + WH-ADC0316M9E8(AN) (WEB-ACXF55-39380-EN) ↗ · WEB-ACXF55-39380-EN · page 54-55 · Reviewed 23 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 23 September 2026