Heat pumps · Error codes · Clivet
C0Clivet · Edge EVO 2.0 EXC (WiSAN-YME 1 S)
C0 on a Clivet Edge EVO 2.0 EXC: Multiple units configured as master in the network (printed 'CO')
Short answer
On a Clivet heat pump, C0 means: Multiple units configured as master in the network (printed 'CO'). The manual does not say whether the heat pump stops. An engineer is needed to fix the cause.
Reviewed 23 September 2026 · 1 source
What it means
The manual says: Multiple units configured as master in the network (printed 'CO').
Likely causes:
- See Clivet WiSAN-YME manual corrective-action column for this code (not reliably transcribed).
Is it safe?
| Does the heat pump stop? | Not stated |
|---|---|
| Engineer needed? | Yes |
The manual does not say whether the heat pump stops.
What you can check
- Read and note the exact code shown on the controller display.
- Check the heat pump's breaker/isolator at the consumer unit is on.
- Restart once via the controller (OFF then ON) as the manual allows; if the code returns, call an engineer.
What the engineer will check
- See Clivet WiSAN-YME manual corrective-action column for this code (not reliably transcribed).
Sources
- CLIVET WiSAN-YME 1 S 2.1-14.1 Manual for Installation, Use and Maintenance, M0PE00002-00 10-22 (ManualsLib copy) ↗ · M0PE00002-00 · page 167 · Reviewed 23 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 23 September 2026