TAVRIDA ELECTRIC VCB Series, User Manual, Page: 85 / 142

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Table 13 - CM self-diagnostic indication
CM state
Indication
LED Power LED Ready LED Malfunction
Power supply voltage is absent
more than 3 minutes
off off off
"Close" operation is preparing continuous off off
CM is ready and operable continuous continuous off
Power supply voltage is absent
for more than 1.5 seconds
off continuous 1 blink
Excessive trip or close time continuous off 2 blinks
Actuator coil isolated continuous off 3 blinks
Short circuit of Actuator coil continuous off 4 blinks
Manual Trip and Lock continuous off 5 blinks
Out of temperature range continuous off 6 blinks
ISM state is open without
command from the CM
continuous off 7 blinks
Internal fault of the CM continuous off continuous
Notes.
1. Number of blinks in series followed by 1.5 s intervals, continuous light or off state are shown for LED
indicators.
2. Period of checking Actuator Coil state (short circuit / isolated)
– 10 s.
Priority of the fault indication starting from the lowest one:
1. CM is out of temperature range;
2. ISM state is open without command from the CM;
3. Excessive trip or close time;
4. Manual Trip and Lock;
5. Actuator coil isolated;
6. Short circuit of Actuator coil;
7. Power supply voltage is absent more than 1.5 seconds.