Heat pumps · Error codes · Stiebel Eltron
8193Stiebel Eltron · WPM 3 heat pump manager (older controller)
8193 on a Stiebel Eltron WPM 3 heat pump manager: Multiple occurrence of fault INV H INV EXCESS TEMP
Short answer
On a Stiebel Eltron heat pump, 8193 means: Multiple occurrence of fault INV H INV EXCESS TEMP. The heat pump stops until the fault clears or is reset. An engineer is needed to fix the cause.
Reviewed 23 September 2026 · 1 source
What it means
The manual says: Multiple occurrence of fault INV H INV EXCESS TEMP.
Part involved: unspecified.
When it shows: Multiple occurrence of fault INV H INV EXCESS TEMP.
Likely causes:
- See fault INV H INV EXCESS TEMP.
Is it safe?
| Does the heat pump stop? | Yes |
|---|---|
| Severity | Fault — needs a manual reset once the cause is fixed |
| Engineer needed? | Yes |
The heat pump stops until the fault clears or is reset.
Resetting itself: no.
Manual reset: yes - WPM/IWS reset after cause removed (contractor).
What you can check
- Read and note the full message code and time from the WPM display (DIAGNOSIS / NOTIFICATIONLIST if accessible without a code).
- Check the heat pump and controller circuit breakers/isolators at the consumer unit are on.
What the engineer will check
- See fault INV H INV EXCESS TEMP.
Who to ask for: Heating / heat pump engineer.
What you might notice
Sources
- OPERATION AND INSTALLATION Heat pump manager WPM 3 (DM0000035521) ↗ · A 316199-43934-9674 · page 52 · Reviewed 23 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 23 September 2026