AJ PowerCube P5A - Troubleshooting

File version: V1.0
Page 30 of 33
8.3 Troubleshooting
8.3.1 Fault Code and Handling Methods
Fault code
Fault name
Whether it affects
the output or not
Description
【01】
BatVoltLow
No
Battery under-voltage alarm
【02】
BatOverCurrSw
Yes
Battery discharge average current over-current software
protection
【03】
BatOpen
Yes
Battery not-connected alarm
【04】
BatLowEod
Yes
Battery under-voltage stop discharge alarm
【05】
BatOverCurrHw
Yes
Battery over-current hardware protection
【06】
BatOverVolt
Yes
Charging over-voltage protection
【07】
BusOverVoltHw
Yes
Bus over-voltage hardware protection
【08】
BusOverVoltSw
Yes
Bus over-voltage software protection
【09】
PvVoltHigh
No
PV over-voltage protection
【10】
PvBuckOCSw
No
Buck over-current software protection
【11】
PvBuckOCHw
No
Buck over-current hardware protection
【12】
bLineLoss
No
Mains power down
【13】
OverloadBypass
Yes
Bypass overload protection
【14】
OverloadInverter
Yes
Inverter overload protection
【15】
AcOverCurrHw
Yes
Inverter over-current hardware protection
【17】
InvShort
Yes
Inverter short circuit protection
【19】
OverTemperMppt
No
Buck heat sink over temperature protection
【20】
OverTemperInv
Yes
Inverter heat sink over temperature protection
【21】
FanFail
Yes
Fan failure
【22】
EEPROM
Yes
Memory failure
【23】
ModelNumErr
Yes
Model setting error
【26】
RlyShort
Yes
Inverted AC Output Back-fills to Bypass AC Input
【29】
BusVoltLow
Yes
Internal battery boost circuit failure
8.3.2 Common Faults and Handling Methods
Faults
Handling measures
No display on the screen
Check if the battery air switch or the PV air switch has been closed; if the switch is
in the "ON" state; press any button on the screen to exit the screen sleep mode.
Battery over-voltage protection
Measure if the battery voltage exceeds rated, and turn off the PV array air switch
and Mains air switch.
Battery under-voltage protection
Charge the battery until it returns to the low voltage disconnection recovery voltage.