{"id":2265,"date":"2026-01-13T07:53:23","date_gmt":"2026-01-13T07:53:23","guid":{"rendered":"https:\/\/wiki.solars.co.za\/?page_id=2265"},"modified":"2026-01-22T06:15:46","modified_gmt":"2026-01-22T06:15:46","slug":"dyness-fault-codes","status":"publish","type":"page","link":"https:\/\/wiki.solars.co.za\/?page_id=2265","title":{"rendered":"Dyness Fault Codes"},"content":{"rendered":"\t\t
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Dyness Fault Codes <\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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Inverters<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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Power grid loss <\/div><\/span>\n\t\t\t\t\t\t\t\n\t\t\t<\/path><\/svg><\/span>\n\t\t\t<\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t
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Fault Name<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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Grid Loss<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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Solution<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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1.The alarm is automatically cleared after the grid
power supply is restored.
2.Check whether the AC cable is connected and
the AC breaker is on.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t

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Grid voltage fault <\/div><\/span>\n\t\t\t\t\t\t\t\n\t\t\t<\/path><\/svg><\/span>\n\t\t\t<\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t
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Fault Name<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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Grid voltage fault<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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Solution<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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Cause:\u00a0<\/strong><\/p>

Grid voltage exceeds allowable range
(undervoltage\/overvoltage\/VRT). The inverter
automatically returns to normal operation after
detecting that the power grid is normal.
Solutions:<\/strong>
1.If the problem occurs frequently, check whether
the grid voltage is within the permissible range.
2.Check grid voltage compliance. If unstable,
configure BACK-UP as EPS mode.
3.Enable high-impedance mode if voltage
fluctuates severely at remote installations.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t

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Grid frequency fault <\/div><\/span>\n\t\t\t\t\t\t\t\n\t\t\t<\/path><\/svg><\/span>\n\t\t\t<\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t
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Fault Name<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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Grid
frequency
fault<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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Solution<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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Cause: Grid frequency exceeds allowable range
(under\/over frequency).
The inverter automatically returns to normal
operation after detecting that the power grid is
normal.<\/p>

Solutions:
Verify grid frequency compliance. Contact the
utility company to adjust protection thresholds if<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t

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Grid phase angle fault <\/div><\/span>\n\t\t\t\t\t\t\t\n\t\t\t<\/path><\/svg><\/span>\n\t\t\t<\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t
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Fault Name<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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Grid phase angle fault<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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Solution<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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Cause: Grid voltage phase angle deviation. Rare
occurrence. The inverter automatically returns to
normal operation after detecting that the power
grid is normal.
Solutions:
Contact service provider if persistent.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t

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Grid phase sequence fault <\/div><\/span>\n\t\t\t\t\t\t\t\n\t\t\t<\/path><\/svg><\/span>\n\t\t\t<\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t
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Fault Name<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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Grid phase sequence fault<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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Solution<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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Cause:<\/p>

Incorrect phase sequence (non-positive
sequence).<\/p>

Solutions:
1. Enable phase sequence auto-adaptation
(default: enabled).
2. Verify grid terminal wiring sequence.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t

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Fault Name<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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AC current has a high DC component<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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Solution<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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Cause:<\/p>

The problem is caused by an external fault
like a utility grid exception or frequency
exception, the inverter will recover automatically
after solving the problem.<\/p>

Solutions:
1.If the problem occurs frequently contact the
dealer or the after-sales service.
2.If it persists and cannot be recovered, it may be
a sensor malfunction, please contact the service
provider for confirmation.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t

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Off-grid high dc component <\/div><\/span>\n\t\t\t\t\t\t\t\n\t\t\t<\/path><\/svg><\/span>\n\t\t\t<\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t
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Fault Name<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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Off-grid AC voltage has a high DC component<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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Solution<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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Cause:<\/p>

Generally caused by half-wave load, it can
automatically restore normal operation.<\/p>

Solutions:<\/p>

1. Check load types (avoid half-wave load).
2. If it persists and cannot be recovered, it may be
a sensor malfunction, please contact the service
provider for confirmation<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t

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N-PE relay fault <\/div><\/span>\n\t\t\t\t\t\t\t\n\t\t\t<\/path><\/svg><\/span>\n\t\t\t<\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t
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Fault Name<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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N-PE relay fault<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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Solution<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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Cause: Generally caused by poor grounding, stop
after two consecutive tests, you need to manually
clear.<\/p>

Solutions:
1. Ensure proper grounding.
2. Disable N-PE relay via Inverter config if
externally shorted.
3. If the fault persists, the relay may be faulty.
Contact the service provider for confirmation.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t

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BACK-UP output fault <\/div><\/span>\n\t\t\t\t\t\t\t\n\t\t\t<\/path><\/svg><\/span>\n\t\t\t<\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t
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Fault Name<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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BACK-UP output fault (overload, overcurrent, undervoltage)<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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Solution<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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Cause:<\/p>

Overloaded BACK-UP port or insufficient
battery discharge capability.<\/p>

Solutions:
1. Optimize BACK-UP load configuration.
2. Verify battery and load compatibility.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t

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Device over temperature <\/div><\/span>\n\t\t\t\t\t\t\t\n\t\t\t<\/path><\/svg><\/span>\n\t\t\t<\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t
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Fault Name<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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The inverter temperature is too high<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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Solution<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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Cause: High operating temperature<\/p>

Solutions:
1. Ensure adequate airflow and avoid direct
sunlight.
2. If it persists and cannot be recovered, it may be
a sensor malfunction, please contact the service
provider for confirmation<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t

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Fault Name<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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The battery or PV input voltage is too high<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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Solution<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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Cause:\u00a0<\/p>

PV string or battery voltage exceeds
specifications.

<\/p>

Solutions:
1. Please check the number of PV strings to
ensure that the maximum open circuit voltage
does not exceed the inverter operating voltage
range.
2. Check the battery specifications to ensure that
the maximum battery voltage does not exceed the
inverter operating voltage range.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t

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Bus over voltage <\/div><\/span>\n\t\t\t\t\t\t\t\n\t\t\t<\/path><\/svg><\/span>\n\t\t\t<\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t
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Fault Name<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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BUS voltage is too high<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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Solution<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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Cause: The DC bus voltage of the inverter is out of
the working range, usually because the input
voltage of PV strings is too high or the external
environment changes dramatically leading to the
control failure, the inverter will automatically
recover when it detects that the bus voltage is
restored to the working range.<\/p>

Solutions:
1. If it happens frequently, please check the
number of PV strings to make sure the maximum
open circuit voltage does not exceed the inverter
working voltage range.
2. If it is always there and cannot be recovered,
please contact the service provider for
confirmation.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t

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Flash operation failure <\/div><\/span>\n\t\t\t\t\t\t\t\n\t\t\t<\/path><\/svg><\/span>\n\t\t\t<\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t
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Fault Name<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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Internal memory operation failure<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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Solution<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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Cause: Flash memory failure.<\/p>

Solutions:
Replace flash memory if reboot fails, please
contact the service provider for confirmation.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t

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CPLD communication loss <\/div><\/span>\n\t\t\t\t\t\t\t\n\t\t\t<\/path><\/svg><\/span>\n\t\t\t<\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t
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Fault Name<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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CPLD communication loss<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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Solution<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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Cause: Internal logic chip failure.<\/p>

Solutions:
Replace CPLD if reboot fails, please contact the
service provider for confirmation.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t

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Slave DSP communication loss <\/div><\/span>\n\t\t\t\t\t\t\t\n\t\t\t<\/path><\/svg><\/span>\n\t\t\t<\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t
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Fault Name<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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Slave DSP communication loss<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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Solution<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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Cause: Firmware upgrade failure or chip damage.
Solutions:
1. Retry firmware upgrade.
2. Replace DSP chip if unresolved, please contact provider<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t

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ARM communication loss <\/div><\/span>\n\t\t\t\t\t\t\t\n\t\t\t<\/path><\/svg><\/span>\n\t\t\t<\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t
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Fault Name<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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ARM communication loss<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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Solution<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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Cause: Communication failure between ARM and
DSP.
Solutions:
1. Retry firmware upgrade.
2. Contact service provider.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t

\n\t\t\t\t\n\t\t\t\t\t
Battery connect abnormal <\/div><\/span>\n\t\t\t\t\t\t\t\n\t\t\t<\/path><\/svg><\/span>\n\t\t\t<\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t
\n\t\t
\n\t\t\t\t
\n\t\t\t\t\t

Fault Name<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

Abnormal battery access<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

\n\t\t\t\t
\n\t\t\t\t\t

Solution<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

Cause: Battery ready function not purchased or
hardware mismatch.<\/p>

Solutions:
1. Remove battery if function is disabled.
2. Contact service provider for standard models.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t

\n\t\t\t\t\n\t\t\t\t\t
Insulation fault <\/div><\/span>\n\t\t\t\t\t\t\t\n\t\t\t<\/path><\/svg><\/span>\n\t\t\t<\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t
\n\t\t
\n\t\t\t\t
\n\t\t\t\t\t

Fault Name<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

Abnormal battery access<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

\n\t\t\t\t
\n\t\t\t\t\t

Solution<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

Cause: Battery ready function not purchased or
hardware mismatch.<\/p>

Solutions:
1. Remove battery if function is disabled.
2. Contact service provider for standard models.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t

\n\t\t\t\t\n\t\t\t\t\t
Battery connect abnormal <\/div><\/span>\n\t\t\t\t\t\t\t\n\t\t\t<\/path><\/svg><\/span>\n\t\t\t<\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t
\n\t\t
\n\t\t\t\t
\n\t\t\t\t\t

Fault Name<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

The insulation resistance is low<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

\n\t\t\t\t
\n\t\t\t\t\t

Solution<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

Cause:<\/p>

System insulation below safety threshold.
Solutions:
1. Check PV\/battery insulation for damage. For
example, the wiring harness is damaged or the
component shell is damaged.
2. Isolate components to diagnose.
3. Contact service provider.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t

\n\t\t\t\t\n\t\t\t\t\t
GFCI protection <\/div><\/span>\n\t\t\t\t\t\t\t\n\t\t\t<\/path><\/svg><\/span>\n\t\t\t<\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t
\n\t\t
\n\t\t\t\t
\n\t\t\t\t\t

Fault Name<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

GFCI protection<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

\n\t\t\t\t
\n\t\t\t\t\t

Solution<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

Cause: System leakage current exceeds limit.
After the fault disappears, the inverter
automatically returns to normal operation.
Solutions:
1. Inspect system components and grounding.
2.If the fault persists, the sensor may be faulty.
Contact the service provider for confirmation.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t

\n\t\t\t\t\n\t\t\t\t\t
Reference voltage fault <\/div><\/span>\n\t\t\t\t\t\t\t\n\t\t\t<\/path><\/svg><\/span>\n\t\t\t<\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t
\n\t\t
\n\t\t\t\t
\n\t\t\t\t\t

Fault Name<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

Reference voltage fault<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

\n\t\t\t\t
\n\t\t\t\t\t

Solution<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

Cause: Control board reference voltage failure.
Solutions:
Replace hardware if reboot fails, please contact
the service provider for confirmation.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t

\n\t\t\t\t\n\t\t\t\t\t
AC relay fault <\/div><\/span>\n\t\t\t\t\t\t\t\n\t\t\t<\/path><\/svg><\/span>\n\t\t\t<\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t
\n\t\t
\n\t\t\t\t
\n\t\t\t\t\t

Fault Name<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

AC relay fault<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

\n\t\t\t\t
\n\t\t\t\t\t

Solution<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

Cause: Inverter AC terminal relay self-test fails,
two consecutive self-test failures stop operation,
need to manually recover.
Solutions:
1. If it happens frequently, please check whether
there is poor contact or empty connection in the
inverter grid port wiring.
2. If the fault described in 1 is rectified and the
relay cannot be recovered after restart, contact
the service provider for confirmation.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t

\n\t\t\t\t\n\t\t\t\t\t
Relay once self-test fault <\/div><\/span>\n\t\t\t\t\t\t\t\n\t\t\t<\/path><\/svg><\/span>\n\t\t\t<\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t
\n\t\t
\n\t\t\t\t
\n\t\t\t\t\t

Fault Name<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

Relay self-test fault<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

\n\t\t\t\t
\n\t\t\t\t\t

Solution<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

Cause: The inverter AC terminal relay fails the
single self-test, the inverter will automatically
re-test and resume operation after it passes.
Solutions:
If it happens frequently, please check whether the wiring of inverter grid port has poor contact or
empty connection.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t

\n\t\t\t\t\n\t\t\t\t\t
HCT fault <\/div><\/span>\n\t\t\t\t\t\t\t\n\t\t\t<\/path><\/svg><\/span>\n\t\t\t<\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t
\n\t\t
\n\t\t\t\t
\n\t\t\t\t\t

Fault Name<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

HCT fault<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

\n\t\t\t\t
\n\t\t\t\t\t

Solution<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

Cause: Inverter current sensor failure, stop
running, need to restart manually to recover.
Solutions:
If it can not be restored after reboot, it may be
the inverter sensor failure, please contact the
service provider for confirmation.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t

\n\t\t\t\t\n\t\t\t\t\t
HCT self-test fault <\/div><\/span>\n\t\t\t\t\t\t\t\n\t\t\t<\/path><\/svg><\/span>\n\t\t\t<\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t
\n\t\t
\n\t\t\t\t
\n\t\t\t\t\t

Fault Name<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

HCT self-test fault<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

\n\t\t\t\t
\n\t\t\t\t\t

Solution<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

Cause: Inverter current sensor self-test failure,
the inverter will automatically re-test and resume
operation after it passes.
Solutions:
If it happens frequently, please contact the service
provider for confirmation.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t

\n\t\t\t\t\n\t\t\t\t\t
GFCI self-test fault <\/div><\/span>\n\t\t\t\t\t\t\t\n\t\t\t<\/path><\/svg><\/span>\n\t\t\t<\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t
\n\t\t
\n\t\t\t\t
\n\t\t\t\t\t

Fault Name<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

GFCI self-test fault<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

\n\t\t\t\t
\n\t\t\t\t\t

Solution<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

Cause: Inverter GFCI device failure, stop running,
need to restart manually to recover.
Solutions:
If it can not be restored after reboot, it may be
the inverter sensor failure, please contact the
service provider for confirmation.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t

\n\t\t\t\t\n\t\t\t\t\t
GFCI once self-test fault <\/div><\/span>\n\t\t\t\t\t\t\t\n\t\t\t<\/path><\/svg><\/span>\n\t\t\t<\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t
\n\t\t
\n\t\t\t\t
\n\t\t\t\t\t

Fault Name<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

GFCI once
self-test fault<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

\n\t\t\t\t
\n\t\t\t\t\t

Solution<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

Cause: Inverter GFCI self-test failure, the inverter
will automatically re-test and resume operation
after it passes.
Solutions:
If it happens frequently, please contact the service
provider for confirmation.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t

\n\t\t\t\t\n\t\t\t\t\t
PV Connect reverse fault <\/div><\/span>\n\t\t\t\t\t\t\t\n\t\t\t<\/path><\/svg><\/span>\n\t\t\t<\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t
\n\t\t
\n\t\t\t\t
\n\t\t\t\t\t

Fault Name<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

PV Connect reverse fault<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

\n\t\t\t\t
\n\t\t\t\t\t

Solution<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

Cause: PV string polarity reversed.
Solutions:
Correct PV polarity.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t

\n\t\t\t\t\n\t\t\t\t\t
Bat Connect reverse fault <\/div><\/span>\n\t\t\t\t\t\t\t\n\t\t\t<\/path><\/svg><\/span>\n\t\t\t<\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t
\n\t\t
\n\t\t\t\t
\n\t\t\t\t\t

Fault Name<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

Battery reverse connection<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

\n\t\t\t\t
\n\t\t\t\t\t

Solution<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

Cause: Battery polarity reversed.
Solutions:
Correct battery polarity<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"

Dyness Fault Codes Inverters Power grid loss Fault Name Grid Loss Solution 1.The alarm is automatically cleared after the gridpower supply is restored.2.Check whether the AC cable is connected andthe AC breaker is on. Grid voltage fault Fault Name Grid voltage fault Solution Cause:\u00a0 Grid voltage exceeds allowable range(undervoltage\/overvoltage\/VRT). The inverterautomatically returns to normal operation […]<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-2265","page","type-page","status-publish","hentry"],"yoast_head":"\nDyness Fault Codes - Central solar wiki<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/wiki.solars.co.za\/?page_id=2265\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Dyness Fault Codes - Central solar wiki\" \/>\n<meta property=\"og:description\" content=\"Dyness Fault Codes Inverters Power grid loss Fault Name Grid Loss Solution 1.The alarm is automatically cleared after the gridpower supply is restored.2.Check whether the AC cable is connected andthe AC breaker is on. Grid voltage fault Fault Name Grid voltage fault Solution Cause:\u00a0 Grid voltage exceeds allowable range(undervoltage\/overvoltage\/VRT). The inverterautomatically returns to normal operation […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/wiki.solars.co.za\/?page_id=2265\" \/>\n<meta property=\"og:site_name\" content=\"Central solar wiki\" \/>\n<meta property=\"article:modified_time\" content=\"2026-01-22T06:15:46+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/wiki.solars.co.za\/wp-content\/uploads\/2026\/01\/145-150x150.png\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"11 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/wiki.solars.co.za\\\/?page_id=2265\",\"url\":\"https:\\\/\\\/wiki.solars.co.za\\\/?page_id=2265\",\"name\":\"Dyness Fault Codes - Central solar wiki\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/wiki.solars.co.za\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/wiki.solars.co.za\\\/?page_id=2265#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/wiki.solars.co.za\\\/?page_id=2265#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/wiki.solars.co.za\\\/wp-content\\\/uploads\\\/2026\\\/01\\\/145-150x150.png\",\"datePublished\":\"2026-01-13T07:53:23+00:00\",\"dateModified\":\"2026-01-22T06:15:46+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/wiki.solars.co.za\\\/?page_id=2265#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/wiki.solars.co.za\\\/?page_id=2265\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/wiki.solars.co.za\\\/?page_id=2265#primaryimage\",\"url\":\"https:\\\/\\\/wiki.solars.co.za\\\/wp-content\\\/uploads\\\/2026\\\/01\\\/145.png\",\"contentUrl\":\"https:\\\/\\\/wiki.solars.co.za\\\/wp-content\\\/uploads\\\/2026\\\/01\\\/145.png\",\"width\":500,\"height\":500},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/wiki.solars.co.za\\\/?page_id=2265#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/wiki.solars.co.za\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Dyness Fault Codes\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/wiki.solars.co.za\\\/#website\",\"url\":\"https:\\\/\\\/wiki.solars.co.za\\\/\",\"name\":\"Central solar wiki\",\"description\":\"\",\"publisher\":{\"@id\":\"https:\\\/\\\/wiki.solars.co.za\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/wiki.solars.co.za\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/wiki.solars.co.za\\\/#organization\",\"name\":\"Central solar wiki\",\"url\":\"https:\\\/\\\/wiki.solars.co.za\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/wiki.solars.co.za\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/wiki.solars.co.za\\\/wp-content\\\/uploads\\\/2025\\\/11\\\/CSS-Logo-3.png\",\"contentUrl\":\"https:\\\/\\\/wiki.solars.co.za\\\/wp-content\\\/uploads\\\/2025\\\/11\\\/CSS-Logo-3.png\",\"width\":188,\"height\":188,\"caption\":\"Central solar wiki\"},\"image\":{\"@id\":\"https:\\\/\\\/wiki.solars.co.za\\\/#\\\/schema\\\/logo\\\/image\\\/\"}}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Dyness Fault Codes - Central solar wiki","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/wiki.solars.co.za\/?page_id=2265","og_locale":"en_US","og_type":"article","og_title":"Dyness Fault Codes - Central solar wiki","og_description":"Dyness Fault Codes Inverters Power grid loss Fault Name Grid Loss Solution 1.The alarm is automatically cleared after the gridpower supply is restored.2.Check whether the AC cable is connected andthe AC breaker is on. Grid voltage fault Fault Name Grid voltage fault Solution Cause:\u00a0 Grid voltage exceeds allowable range(undervoltage\/overvoltage\/VRT). 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