KOSTAL

- **Left Fan Blockage Warning**: Indicates the left fan is obstructed. To resolve, clean the fan, check for damage to the plug, connection cable, and the fan itself. If the cause remains unidentified, seek assistance from the support hotline. Note: Fan testing is only feasible in feed-in mode.
- **Right Fan Blockage Warning**: Suggests blockage in the right fan.
- **Left Fan Speed Warning**: Signals that the left fan is operating too slowly.
- **Right Fan Speed Warning**: Indicates the right fan is moving too slowly.

Network Failures:
- **N Conductor Failure (106)**: The N conductor is not correctly connected. Action required: Verify the connection of the neutral conductor N.
- **Network Frequency Failure (150)**: Indicates a network frequency error. Suggested action: Check the network frequency.
- **Network Voltage Failures (151 - 164)**: Errors occur during network feed due to incorrect voltage. Ensure all phases and the N relative to PE are checked.
- **Frequency Errors (165 - 178)**: Highlight frequency errors, making operation with an emergency group impossible. The network frequency should be verified.
- **AC Feed Phase Disturbance (240)**: A disturbance on the AC side during the feed phase. Persistent issues necessitate contact with technical support.
- **Network Voltage Too High/Low (250)**: Check the network voltage as it's outside acceptable limits.
- **Phase Errors (279 - 292)**: Suggests a phase error. If possible, check the phase angle.

Fault Current:
- **Fault Current Shutdown (300 - 399)**: Prompted by a fault current, indicating possible insulation errors in the electrical installation on both DC (PV module) and AC (network) sides. Insulation resistance should be checked (minimum 500 kOhm).

Insulation Errors:
- **Insulation Error (400 - 401)**: Insulation resistance is insufficient. Check for insulation defects on the module side, including faulty connectors or moisture. Insulation resistance check is required (minimum 500 kOhm).

Electric Arc Failures:
- **Parallel Electric Arcs (501-503)**: Indicate parallel electric arcs on strings 1 to 3. Comprehensive installation checks are advised to locate potential electric arc indicators.
- **Serial Electric Arcs (504-506)**: Denote serial electric arcs on strings 1 to 3, necessitating thorough inspection of the installation for damage indicative of electric arcs.

Overheating:
- **Device Overheating (601 - 615)**: The device has overheated, leading to a temporary shutdown or power reduction. Let the device cool down and ensure the installation site allows for adequate cooling. Avoid direct sunlight exposure and check the fan for dirt, cleaning as necessary.

System Failures:
- **Internal System Failure (800 - 999)**: Indicates a failure within the system. For sporadic short occurrences, no action is needed. For frequent short appearances or permanent issues, power down the inverter, restart after 5 minutes, and contact technical support if the problem continues.

Models: PIKO 4.2 5.5 7.0 8.3 10.1
MP Plus 5.0-2
3.0 4.2 4.6 5.5 7.0 8.5
30 50 60