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Table 7-4 LCD Troubleshooting PROTECTION
Fault Description / Instruction
Protection
Protect0090
(Bus over voltage)
1. Restart inverter by turning both AC and DC
switches off. Wait for 1 minute for all energy to
discharge and turn both switches ON
2. If inverter cannot clear fault, replace inverter
Protect0070
(Bus imbalance)
1. Raise limit of IDCmax (for example, 400mA) to
allow inverter more room to adjust in transient
condition to cope with imbalance of impedance
and voltage between Grid phases
2. If after adjustment, alarm still occurs, replace
Protect0030
(Inverter Over
Current)
1. Restart inverter by turning both AC and DC
switches off. Wait for 1 minute for all energy to
discharge and turn both switches ON
2. If inverter cannot clear fault, replace inverter
GridV.OutLim
1. Check the AC connections and AC voltage is
within range
2. Restart the inverter again
GridF.OutLim
1. Check the AC connections and AC frequency
is in range
2. Check the measured frequency value on the
LCD, if within limit, restart the inverter
Protect0020
(Grid relay error)
1. Restart inverter by turning both AC and DC
switches off. Wait for 1 minute for all energy to
discharge and turn both switches ON
2. If inverter cannot clear fault, replace inverter
TempOver
(Over-
protection)
1. Confirm the external ambient temperature is
within the specified range of operating
temperature
2. Check whether air inlet is blocked
3. Check whether fan is blocked
4. Check whether the location of installation is
appropriate or not
5. Observe for 30 minutes and see whether the
alarm will be eliminated automatically
6. Contact post-sales service if not corrected
(The sampling
1. If the inverter can start up, then recalibrate
2. If the inverter consistently reports this alarm
and can not start up, then replace inverter
Protect0170
(DCI high)
1. Raise limit of DCImax (for example, 400mA) to
allow inverter more room to adjust in transient
condition to cope with imbalance of impedance
and voltage between grid phases
2. After raising the limit, if inverter cannot clear
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