Fault Code Reference

myenergi Fault Codes

myenergi Zappi EV charger, Eddi power diverter, and Libbi battery storage. UK-designed solar energy management devices built around solar self-consumption.

18
Fault codes
Device types covered
Inverter (18)

Common fault codes

ZP-001
Unknown Cable!
Wait 5 seconds — Zappi retests automatically. Unplug cable, inspect plug for dir…
ZP-002
Pilot Problem!
Wait 5 seconds. Unplug cable, check CP pin for contamination or bending, clean w…
ZP-003
Lock Failure!
Push plug fully into socket until it clicks. Press and hold the button to reset.
ZP-004
Output Fault! (Code 24)
Unplug EV. Press and hold button to reset. Replug EV and monitor.
ZP-005
PE Fault! (Code 25)
SAFETY: Turn off supply before inspecting. Check earth terminal inside Zappi — c…
ZP-006
Comms Fault! / NMI (Code 26)
Unplug EV. Press and hold button to reset. Check myenergi app for fault detail.

All myenergi fault codes

ZP-001
Unknown Cable!
Wait 5 seconds — Zappi retests automatically. Unplug cable, inspect plug for dir…
ZP-002
Pilot Problem!
Wait 5 seconds. Unplug cable, check CP pin for contamination or bending, clean w…
ZP-003
Lock Failure!
Push plug fully into socket until it clicks. Press and hold the button to reset.
ZP-004
Output Fault! (Code 24)
Unplug EV. Press and hold button to reset. Replug EV and monitor.
ZP-005
PE Fault! (Code 25)
SAFETY: Turn off supply before inspecting. Check earth terminal inside Zappi — c…
ZP-006
Comms Fault! / NMI (Code 26)
Unplug EV. Press and hold button to reset. Check myenergi app for fault detail.
ZP-007
SelfTest Failed! (Code 27)
Unplug EV. Press and hold button to reset. Replug EV and allow self-test to run …
ZP-008
Contactor Fault! (Code 28)
Unplug EV. Press and hold button — this will not clear a welded contactor.
ZP-009
RCD Tripped! (Code 29)
Unplug EV. Check if fault persists without EV. Check upstream RCD — reset if tri…
ZP-010
Over Voltage! / Under Voltage! / Bad Voltage Range!
Wait — Zappi auto-resumes when voltage returns to range. Measure supply voltage …
ZP-011
Overheating!
Check location — Zappi must not be in direct sunlight. Move to shaded location i…
ZP-012
Voltage Mismatch!
Confirm model: ZAPPI-2H07 = 7kW single phase, ZAPPI-2H22 = 22kW 3-phase. Verify …
ZP-013
Charge Blocked!
Check myenergi app — confirm no active schedule. Check display mode indicator.
ZP-014
Check Grid CT / Grid CT Lost
Check Grid CT cable inside Zappi — firmly seated in CT1 (red +, black -). Arrow …
ZP-015
Device Offline (app offline, LED flashing red)
Check router — confirm 2.4 GHz SSID broadcasting, credentials unchanged. Power c…
ZP-016
Harvi No Signal / Fault Code (4)3
Check Harvi is powered — harvests energy from cable the CT monitors. If that cab…
ZP-017
Grid Sensor Error! / Fault Code (4)4
Check CT arrow — must point toward consumer unit (direction of import). CT must …
ZP-018
Charge Delayed (normal behaviour)
Wait — Smart Charge delay up to 10 minutes. Cannot be disabled. Zappi displays C…
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