ChargePoint

ChargePoint — field brand hub

Public and fleet DCFC tickets here are almost always Express 250 (air-cooled dual-standard) or Express Plus (high-power, liquid-cooled, NACS-capable). Start by naming the platform before you open a power section. Codes and ownership paths differ, and Express Plus liquid-cooling triage does not transfer to Express 250 air paths.

When this OEM shows up / cabinet vs dispenser

ChargePoint Express sites split work between a power cabinet (PFC / power bricks, fans or coolant skid, contactors, door interlocks) and a dispenser (HMI, RFID/payment, connectors, SECC path). Many “station down” tickets are dispenser-side or link-side while the cabinet is healthy.

Own on the dispenser first: RFID, payment authorize, HMI, gun latch/overtemp, cable IR after a swap.

Own on the cabinet first: PFC overcurrent, power brick offline, module fans, coolant pump, HDC weld detect, door interlock, site LMS curtail.

Own the link before either RMA: dispenser↔cabinet CAN loss looks like a dead stall on Cloud and HMI. Prove the bus before condemning a brick. Photograph which side drops first and whether sibling dispensers on the same cabinet still talk.

Express Plus adds liquid cooling and NACS. Confirm cable serial and coolant state on Plus before any power-brick RMA. On dual-standard Express 250 pads, record which gun (CCS vs CHAdeMO) faulted.

How faults typically present

HMI / station UI

• Red banner or fault code on the dispenser (CP-E250-* / CP-XP-* style strings in Cloud often map 1:1).
• Connector LEDs may still look “ready” while the stall is Unavailable — trust Cloud / OCPP status over cosmetics.
• Door open / interlock: cabinet may refuse to start with little more than a door icon; photograph the latch and switch state before you call it a power fault.
• Soft derate with no hard banner: fans, coolant, or LMS — pull Cloud timeline before assuming “working.”

OCPP / CSMS

• StatusNotification → Faulted or Unavailable with vendorErrorCode / info carrying the real ChargePoint string — log it verbatim.
• Mid-session drop to 0 A + Faulted: isolation, GF, HDC, PFC, or cooling latch — use /guides/ocpp-faulted-triage.
• Payment path: Authorize timeout or ReaderFailure while energy path is idle — split money from kWh (/guides/metering-payment).
• After reboot: Available → Preparing → Faulted again is a hard latch, not “needs another reboot” (/entries/protocol-ocpp-f01-statusnotification-stuck-faulted-after-reboot).

ChargePoint Cloud

• Cloud event timeline usually beats HMI alone. Pull the stall’s last successful session, firmware, and the exact code before you LOTO.
• Multi-stall pads: confirm whether one dispenser, one cabinet, or the whole pad shares the event.
• Keep timestamps matched between Cloud export and phone photos of the HMI.

Ranked common failure patterns

Express 250

1. Ground fault under rain / wash-down — Moisture bridging GF sensing or bad cable boot seals. Do not keep resetting. Dry, inspect boots, measure PE. Entry: /entries/chargepoint-cp-e250-gf-ground-fault-trip-under-rain. Site PE path: /entries/protocol-gnd-01-ground-continuity-fail-at-dispenser.

2. Isolation after cable swap — New cable/gun IR or wet connectors presenting as cabinet isolation. Swap known-good cable before power-stage blame. Entry: /entries/chargepoint-cp-e250-iso-isolation-fault-after-cable-swap. Protocol stage: /guides/ccs-handshake-basics, /entries/protocol-ccs-h03-cable-check-isolation-fail.

3. Dispenser–cabinet CAN loss — Stall looks dead; Cloud may show InternalError / Unavailable. Check terminators, harness, grounding, and which side drops first. Entry: /entries/chargepoint-cp-e250-comm-dispenser-cabinet-can-loss.

4. Power module fan fail — Filters, blocked inlets, or dead fans before sensor swaps. Entry: /entries/chargepoint-cp-e250-fan-power-module-fan-fail.

5. Door interlock open — Misaligned latch, sticky switch, service door left ajar. Entry: /entries/chargepoint-cp-e250-door-cabinet-door-interlock-open.

6. PFC stage overcurrent — Prove grid / phase / upstream trips with /guides/site-power-quality-basics before module RMA. Entry: /entries/chargepoint-cp-e250-pfc-pfc-stage-overcurrent.

7. HDC contactor weld detect — High-cycle depots; verify aux feedback before shotgun contactors. Entry: /entries/chargepoint-cp-e250-hdc-hdc-contactor-weld-detect.

8. Station RFID unresponsive — Reader/harness/config after board work; not a PFC problem. Entry: /entries/chargepoint-cp-e250-rfid-station-rfid-unresponsive. Related: /entries/protocol-rfid-01-rfid-reader-no-uid.

Express Plus

1. Liquid cooling pump fail — Airlock, low level, pump, or sensor after cable/service. Entry: /entries/chargepoint-cp-xp-cool-liquid-cooling-pump-fail. Loop triage: /guides/liquid-cooling-loops. Airlock after fill: /entries/site-generic-cool-air-airlocked-loop-after-fill.

2. NACS port overtemp — Handle/pins, airflow, repeated high-power sessions. Entry: /entries/chargepoint-cp-xp-nacs-nacs-port-overtemp. NACS path: /guides/nacs-field-notes, /entries/protocol-nacs-h03-nacs-thermal-derate-to-zero.

3. Power brick offline — One brick offline derates the stall; confirm which brick and link health before full bank swap. Entry: /entries/chargepoint-cp-xp-mod-power-brick-offline.

4. Site LMS curtails Express Plus — Budget / CT map / LMS heartbeat, not a dead brick. Entry: /entries/chargepoint-cp-xp-lms-site-lms-curtails-express-plus. Related: /entries/protocol-load-01-dynamic-load-management-caps-to-0-a.

5. Payment authorize timeout — PED/host path separate from energy. Entry: /entries/chargepoint-cp-xp-pay-payment-authorize-timeout. Related: /entries/ingenico-pay-to-payment-terminal-timeout.

Log sources / tools

Source	What you pull
ChargePoint Cloud / CSMS	Event codes, firmware, last good session, connector ID
Station HMI	Live banner, service menus if entitled
OCPP export	StatusNotification, MeterValues, Authorize timeline
Cabinet service UI / LEDs	Brick online map, fan/coolant, door/E-stop
Multimeter / IR / megger	PE continuity, IR after cable swap, hotspot on NACS
Known-good cable / gun	Moves isolation vs stays with cabinet

Field checklist (first 15 minutes)

1. Express 250 or Express Plus? Name it on the ticket.
2. One dispenser, one cabinet, or whole pad?
3. Photo HMI + Cloud code + connector ID.
4. Weather / recent cable or coolant work?
5. If ISO/GF: dry + known-good cable before HV.
6. If soft-offline: Heartbeat path and Cloud reachability before brick RMA.
7. If Plus thermal: coolant level/flow/pump sound before module swap.

When to escalate

Electrician / site power — Feeder undervoltage, phase loss, breaker trips correlating with PFC / GF; PE open at pedestal; LMS / CT wiring after site expansion.

Network / CSMS ops — Cloud offline with healthy cabinet power; OCPP URL / identity / cert after board or SIM swap; Authorize storms or payment host declines with healthy energy path; LMS policy capping stalls to 0 A during revenue hours.

ChargePoint OEM / RMA — Confirmed brick/PFC/HDC after grid and link proven; coolant pump or sensor path with flow/pressure evidence; firmware-related latch with Cloud package attached.

Do not open an RMA for LMS curtail, rain GF without dry-out/PE check, or CAN loss without bus evidence.