DIY User Manual

34 of 39
10-539-1 MN5048DIY REV -
MN5048DIY
User Manual
6.3 Troubleshooting
Faults Handling measures
No display on the screen
Check if the battery circuit breaker or the PV circuit breaker are closed;
if the switch is in the "ON" state; press any button on the screen to
exit the screen sleep mode.
Battery overvoltage
protection
Measure if the battery voltage exceeds rating, and turn off the PV
array and Mains circuit breakers.
Battery undervoltage
protection
Charge the battery until it returns to the low voltage disconnection
recovery voltage.
Fan failure Check if the fan is not turning or blocked by foreign objects.
Heat sink over temperature
protection
When the temperature of the device is cooled below the recovery
temperature, normal charge and discharge control will resume.
Bypass overload pro tection,
inverter overload protection
① Reduce the use of power equipment;
② Restart the unit to resume load output.
Inverter short circuit
protection
① Check the load connection carefully and clear any short circuit faults.
② Re-power up to resume load output.
PV overvoltage
Use a multimeter to check if the PV input voltage exceeds the
maximum allowable input voltage rated .
Battery missing alarm
Check if the battery is not connected or if the battery circuit breaker
is not closed.