> ## Documentation Index
> Fetch the complete documentation index at: https://learning.kent.co.in/llms.txt
> Use this file to discover all available pages before exploring further.

# Comm Fault

> Battery, meter and parallel communication failures — the cable-first triage flow.

export const children_0 = undefined

export const Escalate = () => <div>
    <p><strong>Escalate to Kent New Energy service only</strong> — through your registered Kent
    partner channel or the Kent service desk details on your work order. Do not contact any
    third-party or component-manufacturer support line for a Kent-branded system: tickets outside
    the Kent channel are not tracked, not covered, and can void warranty handling.</p>
  </div>;

export const Applicability = ({labels}) => <div style={{
  border: "1px solid #0057A8",
  borderLeft: "6px solid #0057A8",
  borderRadius: "8px",
  padding: "10px 14px",
  margin: "0.75rem 0 1.25rem 0",
  background: "rgba(0, 87, 168, 0.06)",
  fontSize: "0.9em"
}}>
    <strong style={{
  color: "#0057A8",
  marginRight: "8px"
}}>Applies to:</strong>
    {labels.map(l => <span key={l} style={{
  display: "inline-block",
  border: "1px solid #0057A8",
  borderRadius: "999px",
  padding: "1px 10px",
  margin: "2px 6px 2px 0",
  background: "#ffffff",
  color: "#003F7D",
  fontWeight: 600
}}>{l}</span>)}
  </div>;

export const SITE_NAME = "Kent New Energy Knowledge Base";

<Applicability labels={["Kent G3 Hybrid Inverter", "Kent Lithium Battery"]} />

**Symptom:** a comm alarm on the display, missing SOC, frozen meter data, or parallel units
that stopped talking.

## Check first

1. **Which link?** Battery (SOC/BMS), meter (grid data), or parallel bus — the alarm string
   names it; fix one link at a time.
2. **Kent battery link down? Crossover cable first.** A straight RJ45 on this pairing is a
   guaranteed comm failure — verify the labelled cable before any settings work.
3. **Connectors seated, correct port?** Click-home RJ45s at both ends, on the port the
   platform page names — before deeper diagnosis.

{children_0}

<Note>
  **Datalogger stick "offline" is not a display comm fault.** The stick is fitted physically
  per the installation pages and is **activated with Kent Central Command — documentation to
  follow.** Nothing in commissioning or troubleshooting here depends on it.
</Note>

<Note>
  After restoring a battery link, close with the **full-charge SOC verification** from
  [SOC Mismatch](/battery/soc-mismatch) — the drift accumulated offline doesn't clear itself.
</Note>

## Escalate when

* BMS silent after cable **and** selection are verified — battery-level case for Kent
  service. {/* CITE: workbook T9 escalation trigger */}
* A meter is dead with wiring, selection and supply verified — replacement case.
* Parallel sync fails on a verified cabling/DIP/address setup.

<Escalate />

## Related pages

* [Cable Checks](/battery/cable-checks)
* [BMS Comms Basics](/battery/bms-comms-basics)
* [Meter & Phase Matching](/ct-meter/meter-phase-matching)