Special status screens
The special status screens are displayed depending on events that occur during the product life. The screens depend on the event type but always trigger the product status LED to red and the insulation alarm relay is active. If the preventive insulation alarm relay is configured in mirror mode, it is also triggered and no longer mirrors the insulation alarm relay.
Over-limit capacitance detection
The over-limit capacitance detection state is triggered when the capacitance of the monitored system becomes too high. For details on the device specification, refer to Specifications. In case of detected over-limit capacitance, the device can not monitor the system.
Power Circuit or Control Ciruit
Photovoltaic Circuit (IM400-1700)
The overvoltage state is triggered when the voltage of the monitored system becomes too high. For details on the device specification, refer to Specifications. In case of overvoltage, the device can not monitor the system and the device automatically disconnects the power system. Disconnect the auxiliary power supply of device and reconnect.
The inoperative product state is triggered when the device is inoperative.
Disconnected Injection Detection
The state of disconnected injection is triggered when the injection circuit of the device is interrupted. In case of disconnected injection detected, the device is no longer able to monitor the ungrounded system.
If the Disconnect Inj. parameter in the Ins. Alarm menu is set to ON, the following screen displays:
If the Disconnect Inj. parameter is set to OFF, the device displays R > 10 MΩ.
HV1 and HV2 open detection
Applicable for IM400THRN.
The HV1 and HV2 open detection is triggered when the terminals HV1 and HV2 are not shorted and the V. Adapt parameter in the Network menu is set to P1N (See Wiring diagram).
When the terminals HV1 and HV2 are not shorted and the V. Adapt parameter is set to None, the device displays the resistance of the ungrounded system.