Sunways STT Series - Page 23

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Error Message Description Troubleshooting
Bus Voltage Fault BUS voltage is over-high.
① Restart the inverter, wait a moment for invert-
er recovery.
② If the fault occurs repeatedly, please contact
Sunways.
SCI Fault
Internal communication fails.
Caused by a strong external
magnetic fi eld etc.
① Restart the inverter, wait a moment for invert-
er recovery.
② If the fault occurs repeatedly, please contact
Sunways.
SPI Fault
Internal communication fails.
Caused by a strong external
magnetic fi eld etc.
① Restart the inverter, wait a moment for invert-
er recovery.
② If the fault occurs repeatedly, please contact
Sunways.
E2 Fault
Internal storage anomaly.
Caused by a strong external
magnetic fi eld etc.
① Restart the inverter, wait a moment for invert-
er recovery.
② If the fault occurs repeatedly, please contact
Sunways.
GFCI Device Fault GFCI device anomaly.
① Restart the inverter, wait a moment for invert-
er recovery.
② If the fault occurs repeatedly, please contact
Sunways.
AC Transducer Fault AC transducer anomaly.
① Restart the inverter, wait a moment for invert-
er recovery.
② If the fault occurs repeatedly, please contact
Sunways.
Error Message Description Troubleshooting
Relay Check Fail
Self-checking of relay fails.
neutral & ground cable are not
connected well on AC side or just
occasional failure.
① Check use multi-meter if there is high voltage
(normally should be lower than 10V) between
N&PE cable on AC side. If the voltage higher than
10V, it means the Neutral & ground cable are not
connected well on AC side or restart inverter.
② If the neutral & ground cable are connected
well, please contact Sunways.
Flash Fault
Internal storage anomaly.
Caused by a strong external
magnetic fi eld etc.
① Restart the inverter, wait a moment for invert-
er recovery.
② If the fault occurs repeatedly, please contact
Sunways.
External Fan Fault External fan anomaly.
① Stop the inverter and disconnect the AC&DC
cables.
② Check whether the fan is blocked by foreign
matters. If not, replace the fan.
Internal Fan Fault Internal fan anomaly.
① Restart the inverter, wait a moment for invert-
er recovery.
② If the fault occurs repeatedly, please contact
Sunways.
7 Troubleshooting7 Troubleshooting