Contents

Output Contactor Answer Back Detection
The output contactors can be observed using the output contactor answer back function. Therefore an auxiliary
contact of the motor contactors must be connected to a digital input which is set to for this function
(H1-=86). If no answer back signal comes from the contactor, the inverter detects a SE1 fault (see below).
•Multi-function Digital Inputs (H1-01 to H1-05)
Control Methods
Set
Value
Function
V/f
Open
Loop
Vector
Closed
Loop ´
Vector
86 Output contactor answer back Yes Yes Yes
SE1 fault (SE1:Contactor Feed-back Faults)
There are 3 possibilities of fault condition
Case 1: Output contactor of output inverter kept closing before contactor closed command set.
Case 2: Output contactor cannot be closed within the contactor close delay time.
Case 3: Output contactor is opened during inverter running.
Contactor Faults
Speed
Up/Down
Speed selection
Inverter enable(D/I)
Contactor Control(D/O)
Run Delay
DC Injection/
zero servo
Contactor comformation
Contactor comformation
Contactor comformation
Case 1
Case 2
Case 3
5-46