CPS SCH100KTL-DO-600 - Page 96

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PROTECTION CODES
start up, then replace inverter.
Protect0170
(DCI high)
Recommended solutions:
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 limit, if inverter cannot clear fault, replace
inverter.
IsolationErr
(Insulation
resistance low)
Check wires of PV and ground:
1. Turn OFF AC switch to disconnect inverter from Grid.
2. Open fuse drawers to de-couple PV strings from each other.
Test strings with string test set.
3. Add one PV string at a time and start up inverter to see if
alarm occurs.
4. If there is no alarm, turn OFF AC switches to disconnect
from Grid and add in the next string. Startup inverter
again.
5. Continue until you can find the string that triggers the alarm.
Trace wirings of faulted string to find any leakage to Earth
Ground.
6. The parameter ISOResist in hidden menu can be adjusted.
GFCIErr
(leakage current
high)
Check wires of PV and ground:
1. Turn OFF AC switch to disconnect inverter from Grid.
2. Open fuse drawers to de-couple PV strings from each other.
Test strings with string test set
3. Add one PV string at a time and start up inverter to see if
alarm occurs.
4. If there is no alarm, turn OFF AC switches to disconnect
from Grid and add in the next string. Startup inverter
again.
5. Continue until you can find the string that triggers the alarm.
Trace wirings of faulted string to find any leakage to Earth
Ground.
Protect0150
(Mini MCU Fault)
Recommended solutions:
1. Restart inverter by recycling 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.
Protect0110
(BUS over voltage
(firmware))
Recommended solutions:
1. Restart inverter by recycling 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.