SPH 3-6K Hybrid Inverter troubleshooting
Attention, please. For SPH 3-6K Standard inverter ( Not UP model ) ONLY can modify safety type via dip swith like below.
Error code
1. Error 411
Internal communication failed
Triggering condition:
1. Abnormal communication between M3 and DSP chip , last for 900 ms
2. Abnormal communication between M3 and BDC chip , last for 900 ms
2. Error 418
DSP and COM firmware version unmatch, system fault
Triggering condition:
1. dSP and com Fireware on M3 board is not different, once 900ms has exceeded, it will alarm 418fault
3. Error 303
Inverter L N reversed or ground failed
3. Error 405
Relay fault
Relay Short circuit : voltage is 0
Relay Open circuit; Detect the voltage between 2 group of relays, if near to lowest grid voltage like 150V, then it will alarm.
4. Error PV Isolation too low
PV Isolation too low
ISO value is 22K resistance , once less than the value, it will trigger the fault
5. OP Short circuit Fault
Output Voltage is less than 45V and Output current is 15A
6. NTC Open
3 temperature sensors, test the voltage of sensors. Once less than 2.5V, it will alarm
7. Error 406
Model set up not meet certification
8. Residual I High
Leakage current too high
Inverter detects GFCI value, once it is greater than 30mA, it will trigger the fault.
9. Error 408
DC-DC Temperature over range :85 degree
10. PV voltage greater than datasheet
PV voltage trigger point: 540v
Warning code
1. Warning 401
SP-CT/Meter Communication fault
2. Warning 203
MPPT1 or MPPT2 Circuit short
PV voltage is lower 30V and greater than 3A.
3. Warning 506
Battery temperature out of specified range for charge or discharge
4. AC V Outrange
Grid voltage fault
5. AC F Outrange
Grid frequency fault
6. PairingTimeOut
Communication fault
8. CT LN Reversed
9. BMS COM Faul
10. Battery reversed
11. bAT NTC OPEN
NTC open ( only for lead acid battery )
12. battery OPEN
Battery terminal open ( only for lithium-ion battery )