Heat pumps · Error codes · Trianco
P07Trianco · Activair R410A indoor wall hung 3kW (S300)
P07 on a Trianco Activair R410A indoor wall hung 3kW: Suction temp. sensor failure (sensor is open or short circuit)
Short answer
On a Trianco heat pump, P07 means: Suction temp. sensor failure (sensor is open or short circuit). 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: Suction temp. sensor failure (sensor is open or short circuit).
Part involved: temperature sensor/thermistor.
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
- Note the exact code shown on the controller (a photo helps) and report it to your installer or the manufacturer's service line.
- Check the heat pump's supply breaker/isolator at the consumer unit is on (do not open any casing).
What the engineer will check
- Check or change the suction temp. sensor.
Who to ask for: heat pump controls / electrical.
Certification: Competent heat pump engineer; electrical competence for work inside the unit.
What you might notice
Sources
- Trianco Activair Wall Hung Air Source Heat Pump S300 (R410A indoor) - Installation Operation and Service Manual ↗ · 2023-07 · page 32 · Reviewed 23 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 23 September 2026