DOCA0189EN–05

Control Voltage Diagnosis

The control voltage supplying the control module at A1-A2 is monitored. If under voltage or over voltage are detected, see Troubleshooting.

Under Voltage

If the control voltage supplying the control module at A1-A2 is lower than 80 % of Ucmin, it is indicated by the Diagnosis LED flashing 2 times at repeated intervals.

Ucmin is the minimum value of rated control voltage range (Uc) of the control module.

Example: for a control module with Uc = 48-130 Vac/Vdc, Ucmin = 48 Vac/Vdc.

Over Voltage

If the control voltage supplying the control module at A1-A2 is higher than 110 % of Ucmax, it is indicated by the Diagnosis LED flashing 3 times at repeated intervals.

Ucmax is the maximum value of rated control voltage range (Uc) of the control module.

Example: for a control module with Uc = 48-130 Vac/Vdc, Ucmax = 130 Vac/Vdc.

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