CPS SCH Series, Installation And Operation Manual

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Table 6-5 Troubleshooting Protection Codes
PROTECTION CODES
Protect0090
(Bus over voltage)
Recommended solutions:
1. Restart inverter by recycle both AC and DC switches.
Wait for 1 minute between OFF and ON for all energy to
discharge.
2. If inverter cannot clear fault, replace inverter.
Protect0070
(Bus imbalance)
Recommended solutions:
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 inverter.
Protect0030
(Inverter Over
Current)
Recommended solutions:
1. Restart inverter by recycle both AC and DC switches. Wait
for 1 minute between OFF and ON for all energy to
discharge.
2. If inverter cannot clear fault, replace inverter.
GridV.OutLim
Recommended solutions:
1. Make sure the grid connection is good.
2. Restart the inverter again.
GridF.OutLim
Recommended solutions:
1. Check the AC wires connection and AC frequency is in
range;
2. Check the measurement value in LCD, if the grid frequency
is in limit, restart the inverter.
Protect0020
(Grid relay error)
Recommended solutions:
1. Restart inverter by recycle both AC and DC switches. Wait
for 1 minute between OFF and ON for all energy to
discharge.
2. If inverter cannot clear fault, replace inverter.
TempOver
(Over-temperature
protection)
Recommended solutions:
1. Confirm that 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 after-sales service personnel.
Protect0180
(The sampling
offset of DCI)
Recommended solutions:
1. If the inverter can start up, then recalibrate.
2. If the inverter consistently reports this alarm and cannot