CPS SCA50KTL-DO/US-480 - Page 127

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Table 8-4 LCD Troubleshooting PROTECTION
Type
Error/State
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 IDC
max
(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
inverter
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-temperature
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
Protect0180
(The sampling
offset of DCI)
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 fault,
replace inverter