CIRCUTOR AFQ Series - Manual (Page 92)

AFQ-4W
92 Instruction Manual
MIN. DC bus voltage
Description The DC bus voltage is too low.
Corrective
Action
Check the input voltage of the three phases of the AFQ-4W and
the circuit breaker 1Q22.
Synchronising
Description Synchronising with the mains frequency.
Corrective
Action
Check the input voltage and the connections if the message
remains on the screen.
Polarity Error
Description Error measuring the load current.
Corrective
Action
Check the measuring transformers connection. Check the unit
configuration, 4.3.2.- OPERATION MODE CONFIGURATION.
DC Bus imbalance
Description The capacitor voltage is decompensated.
Corrective
Action
Reduce the number of harmonics to be neutralised.
NTC connector failure
Description
The NTC temperature probe is disconnected or the temperature
inside the unit is below 0ºC.
Corrective
Action
Make sure the NTC probe is connected to the controller board.
If the temperature inside the cabinet is under 0ºC, do not start the
unit.
Table 12: Not Initial Conditions messages.