Fault codes

A HEART names every problem with a standard fault code, such as storage.full, which means the same on every product. Each code also has a short fixed number, its H-number, such as H-04002, for small screens, lights and phone calls. Each page below gives the likely causes, how to fix or prevent the problem, what the HEART does by itself, and when to call service.

64 codes in 11 areas. Jump to: system power connectivity storage performance software ai sensors actuators data security · Look up an H-number

`system`

01The whole system

H-01001

system.main-function-lost Main function lost The system cannot do its main job. Every HEART MUST be able to detect this.

critical

H-01002

system.main-function-degraded Main function degraded The main job works, but less well than normal.

warning

H-01003

system.flatline No Pulse (flatline) No Pulse for three intervals. Raised by whoever is watching, not by the system itself.

error

H-01004

system.unexpected-restart Unexpected restart The system restarted without being asked to.

warning

H-01005

system.heart-unwell The HEART itself is unwell The HEART itself has a problem. The product may be fine.

warning

H-01006

system.undo-failed A change could not be undone A change the HEART made could not be undone, so the system is left changed. A person must look.

critical

`power`

02Supply, battery, charging

H-02001

power.supply-lost Main power lost Main power is gone. Running on battery or backup, if any.

error

H-02002

power.supply-unstable Power supply unstable Voltage or supply is outside the normal range.

warning

H-02003

power.battery-low Battery low The battery needs charging soon.

warning

H-02004

power.battery-failing Battery failing The battery no longer holds charge as it should.

error

`connectivity`

03Network and links to other systems

H-03001

connectivity.link-lost Network link lost A network link is down.

warning

H-03002

connectivity.link-unstable Network link unstable A link keeps dropping or is very slow.

warning

H-03003

connectivity.dependency-unreachable A service it relies on cannot be reached An outside service or system it relies on cannot be reached.

error

H-03004

connectivity.clock-unsynced Clock not synchronised The clock cannot be checked against a time source.

warning

`storage`

04Disk, memory cards, databases

H-04001

storage.nearly-full Storage nearly full Storage is almost full (the system states the threshold).

warning

H-04002

storage.full Storage full Storage is full. Writing new data fails.

error

H-04003

storage.write-failed Write failed Data could not be written, for a reason other than being full.

error

H-04004

storage.wearing-out Storage wearing out Storage hardware is near the end of its life.

warning

H-04005

storage.corrupted Storage corrupted Stored data or the file system is damaged.

error

`performance`

05Speed, load, heat

H-05001

performance.slow Responses slow Responses take much longer than normal.

warning

H-05002

performance.overloaded Overloaded More work is arriving than can be handled.

warning

H-05003

performance.backlog Backlog growing A queue of waiting work keeps growing.

warning

H-05004

performance.memory-exhausted Memory exhausted Memory is (nearly) used up.

error

H-05005

performance.too-hot Too hot The device is overheating and may slow itself down.

warning

H-05006

performance.overshoot Overshoot A controlled value goes past its target by more than the system's stated limit, such as a room getting colder than its setpoint.

warning

`software`

06Crashes, versions, updates, settings

H-06001

software.error-spike Error spike Errors are happening far more often than normal.

warning

H-06002

software.crashed Crashed A program or component crashed.

warning

H-06003

software.crash-loop Crash loop A component keeps crashing and restarting.

error

H-06004

software.update-failed Update failed An update did not install.

warning

H-06005

software.config-invalid Settings invalid Settings are wrong or contradict each other.

error

H-06006

software.version-mismatch Version mismatch Parts that must work together have incompatible versions.

warning

`ai`

07AI providers, models, budgets

H-07001

ai.provider-unavailable AI provider unavailable The AI model or provider cannot be reached.

warning

H-07002

ai.cost-spike AI cost spike AI spending is rising much faster than normal.

warning

H-07003

ai.budget-near-limit AI budget near its limit AI spending has reached 80% of the budget.

info

H-07004

ai.budget-exceeded AI budget used up The AI budget is used up. AI calls are stopped.

warning

H-07005

ai.model-drift AI model drift The AI model's answers have changed in quality or behaviour.

warning

H-07006

ai.output-rejected AI output rejected AI suggestions keep failing the HEART's checks.

warning

H-07007

ai.lease-expired Brain lease expired The brain lease ran out without a renewal, so the system is brainless.

warning

H-07008

ai.brain-revoked Brain revoked The brain was cut: by a Command Center signal, by the owner, or by the system's own tripwire.

warning

H-07009

ai.answer-rejected Brain answer rejected A brain answer was refused: unsigned, wrongly signed, for another request, or outside the lease.

warning

H-07010

ai.disagreement Brain disagrees with the system's checks The brain's answer disagreed with the system's own checks on something safety-relevant.

warning

`sensors`

08Readings and calibration

H-08001

sensors.no-reading No reading A sensor gives no value.

warning

H-08002

sensors.out-of-range Reading out of range A reading is outside what is physically possible.

error

H-08003

sensors.stuck Reading stuck A reading has not changed when it should have.

error

H-08004

sensors.noisy Readings noisy Readings jump around far more than normal.

warning

H-08005

sensors.drift Sensor drift A sensor has slowly moved away from the true value.

warning

H-08006

sensors.disagree Sensors disagree Two sensors that should agree do not.

warning

`actuators`

09Motors, valves, heaters, compressors

H-09001

actuators.not-responding Actuator not responding A motor, valve or similar part does not react to commands.

error

H-09002

actuators.position-mismatch Position mismatch It ended up somewhere other than where it was told to go.

error

H-09003

actuators.stalled Actuator stalled It is blocked or cannot move.

error

H-09004

actuators.short-cycling Short-cycling It switches on and off far too often.

warning

H-09005

actuators.overcurrent Overcurrent It is drawing more current than it should.

error

`data`

10Data quality, sync, backups

H-10001

data.invalid Data invalid Data fails its checks.

warning

H-10002

data.missing Data missing Expected data has not arrived.

warning

H-10003

data.out-of-sync Data out of sync Two copies of the same data disagree.

warning

H-10004

data.backup-failed Backup failed A backup did not complete.

warning

H-10005

data.integrity-failed Data integrity check failed Data has been changed or damaged when it should not have been.

error

`security`

11Logins, certificates, tampering

H-11001

security.login-failures Many failed logins Many failed login attempts.

warning

H-11002

security.unexpected-access Unexpected access Access from an unknown place, or at an unusual time.

warning

H-11003

security.certificate-expiring Certificate expiring A security certificate expires soon.

warning

H-11004

security.certificate-expired Certificate expired A security certificate has expired.

error

H-11005

security.tamper-detected Tampering detected Someone may have opened or altered the device or its software.

critical

H-11006

security.policy-violation Policy violation Something broke the owner's rules, such as data that should not have left.

error

H-11007

security.anomaly Security anomaly Unusual activity that may be an attack.

warning

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)