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Frequently Asked Questions (FAQS)





Dual power controller reports "switch trip alarm"

Problem Description:

The dual power controller reports a “switch trip alarm”.


question answer:

1. Check whether the load is overloaded.

2. Check whether the load is short-circuited.

3. Check whether the inrush current is too large.

4. Check whether the release is faulty.

Dual power controller reports "phase sequence error"

Problem Description:

The dual power controller reports a "phase sequence error".


question answer:

Check whether the phase sequence of the voltage sampling is A, B, C.

For the off position, the ATS switch stops halfway

Problem Description:

For the off position, the ATS switch stops halfway.


question answer:

1. The closing delay is too short and the opening delay is too short.

2. When the closing delay is "0S", the switch has no action.

Cannot switch for two frame circuit breakers

Problem Description:

It cannot be switched for two frame breakers.


question answer:

1. Check whether the closing coil of the circuit breaker has power.

2. Check whether the programmable output of the controller is configured as "closed output" or check whether the fixed closed output is wired.

3. Check whether the closing delay setting of the controller is greater than "3S".

4. Check whether the programmable output port of the controller is configured as "opening output" and wiring.

5. Check whether one closing input and two closing inputs are connected to the auxiliary contact of the circuit breaker.

For AC contactors, 1 # and 2 # are continuously switched

Problem Description:

For AC contactors, 1 # and 2 # switch continuously.


question answer:

Check that the controller closing delay should be set to "0S" and ATS wiring.

Dual power controller reports "forced break" alarm

Problem Description:

The dual power controller reports a "forced break" alarm.


question answer:

1. Check whether the programmable input port of the controller is configured with "forced breaking".

2. Check whether the ATS switch has “breaking position” (if there is no breaking position, “forced break” is invalid).

The dual power controller reports "one way opening failure" or "two way opening failure"

Problem Description:

The dual power controller reports “One-way opening failure” or “Two-way opening failure”.


question answer:

1. Check whether the closing delay of the controller is set to "0S".

2. Check the wiring of A # opening coil of 1 # and 2 # and check whether the programmable output port of the controller is configured with "1 # switch opening output and 2 # switch opening output.

ATS switch continuous switching

Problem Description:

ATS switch continuous switching


question answer:

1. Check whether the ATS switch 1 # and 2 # closing coil power wires are in good contact.

2. For the ATS switch without interruption position, configure the controller without interruption position.

Dual power controller with display, ATS switch but not action

Problem Description:

The dual power controller has a display, the ATS switch does not work.


question answer:

1. Check whether the programmable output port of the controller is configured with "1 # switch opening output and 2 # switch opening output".

2. Check whether the configured programmable output port is closed and its wiring.

3. Check whether the ATS switch has a break position.

4. Check whether the power of A # switch closing coil of 1 # and 2 # is normal.

5. Check whether 1 # and 2 # voltage sampling is normal.

6. Check the controller for alarm items (for example: forced disconnection, one-way closing fault, two-way closing fault).

7. For ATS without forced disconnection, check whether the controller is configured with a programmable input port as "forced disconnection".

Dual power controller does not display

Problem Description:

The dual power controller is not displayed.


question answer:

Check the DC power supply (DC power supply without suffix, DC power supply or AC power supply with B).

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