HEART actuators.short-cycling H-09004
Short-cycling. It switches on and off far too often.
| Code | HEART actuators.short-cycling; inside a message "code": "actuators.short-cycling" |
|---|---|
| H-number | H-09004: area 09, code 004 |
| Area | actuators: Motors, valves, heaters, compressors |
| Typical severity | warning. A product may set another for its own case. |
| Applies to | Heating, cooling, compressors, pumps, burners |
Likely causes
- A wrong or drifting sensor, so the controller switches too soon.
- Too small a gap between on and off (hysteresis).
- Low flow cutting a burner's flame.
- An oversized unit for its job.
How to fix or prevent it
- Check the sensor and its place.
- Widen the on-off gap, or set a minimum run time.
- Check flow, filters and pumps.
What the HEART does by itself
It raises a warning, often with a cause such as sensors.drift. A Playbook may set a minimum run time, if the product allows it. It resolves when cycling is back to normal.
When to call service
If it continues: short-cycling wears compressors and burners fast.
Related codes
sensors.driftH-08005: Sensor driftperformance.overshootH-05006: Overshootsystem.main-function-degradedH-01002: Main function degraded
Inside a message a code is written bare, "code": "storage.full". In logs, tickets, documents and searches it is written
HEART storage.full. Things that simply happen, such as system.started, are event types, not faults.
The codes are defined in Part 3, Section 5.4, and their H-numbers in Section 5.7.
All of it, as data: fault-codes.json.
All fault codes, by area · All fault codes, by H-number · Problem types (API errors)