Teze TW-EOR48 - Troubleshooting Common Issues; Troubleshooting Table; Battery Voltage and Connectivity Issues; System and BMS Faults

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Guangdong
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42
20
OverTemperInv
Yes
Inverter heat sink over-
temperature protection
21
FanFail
Yes
Fan failure
22
EEPROM
Yes
Reservoir failure
23
ModelNumErr
Yes
Wrong model
24
Busdif
Yes
Busbar voltage imbalance
25
BusShort
Yes
Busbar short circuit
26
Rlyshort
Yes
Inverter output back flow to
bypass
28
LinePhaseErr
Yes
Utility input phase fault
29
BusVoltLow
Yes
Busbar under-voltage
protection
30
BatCapacityLow1
No
Battery SOC below 10% alarm
(Only enable BMS take effect)
31
BatCapacityLow2
No
Battery SOC below 5% alarm
(Only enable BMS take effect)
32
BatCapacityLowStop
Yes
Battery dead (Only enable
BMS take effect)
56
Low insulation
resistance fault
No
PV abnormally low impedance
to ground.
57
Leakage current
overload fault
Yes
System leakage current
exceeds limit.
58
BMSComErr
No
BMS communication failure
59
BMSErr
No
BMS failures occur
60
BMSUnderTem
No
BMS under-temperature alarm
(Only enable BMS take effect)
61
BMSOverTem
No
BMS over-temperature alarm
(Only enable BMS take effect)
62
BMSOverCur
No
BMS over-current alarm (Only
enable BMS take effect)
63
BMSUnderVolt
No
BMS under-voltage alarm
(Only enable BMS take effect)
64
BMSOverVolt
No
BMS over-voltage alarm(Only
enable BMS take effect)
8.2 Troubleshooting
Fault
Code
Meaning
Causality
Remedy
/
Screen no display
No power input, or in
sleep mode.
Closing the circuit breaker.
Ensure the rocker switch is ON. Push any
button on the panel to exit sleep mode
01
Battery under-
voltage
The battery voltage is
lower than the value
set in parameter [14].
Charge the battery and wait until the
battery voltage is higher than the value
set in the parameter item [14].
03
Battery not
connected
The battery is not
connected, or the
BMS in discharge
protection
Check whether the battery is reliably
connected; check whether the circuit
breaker of the battery is not closed;
ensure that the BMS of the Li-ion battery
can communicate properly.
04
Battery over-
discharge
The battery voltage is
lower than the value
Manual reset: Power off and restart.
Automatic reset: charge the battery so