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Main failure

Created: Oct 15, 2020 05:57:48Latest reply: Oct 15, 2020 13:46:06 557 5 0 0 0
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Hi guys!
You know how to fix alarm main failed? even I try to switch off/on AC power. what is the main reason over this case?

BR,

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Unicef
MVE Created Oct 15, 2020 13:46:06

Dear User, hope below can help u:


Solution:
Possible Causes:
1) The AC input power cable is faulty.
2) The upper-level AC input circuit breaker is OFF.
3) The mains grid is faulty.
Measures:
1) Check whether the AC input cable is loose. If yes, secure the AC input cable.
2) Check whether the upper-level AC input circuit breaker is OFF. If yes, handle the back-end circuit failure and then switch on the circuit breaker.
3) Check whether the AC input voltage is lower than 50 V AC. If yes, handle the mains grid fault.

Thanks!

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simchamnan
simchamnan Created Oct 16, 2020 09:30:33 (0) (0)
very helpful  

Recommended answer

(0) (0)
BetterMing
Created Oct 15, 2020 06:13:57

Hello, dear.
I need you to provide more information about the alert. Such as alarm name or alarm code.

Maybe you can refer to the following information:

Solution

Possible Causes:
1) The AC Undervoltage alarm threshold is not set properly on the SMU.
2) The power grid is faulty.

Measures:

1) Check whether the AC Undervoltage alarm threshold is properly set. If no, adjust it to a proper value.

2) Check whether the AC input voltage is below the AC Undervoltage alarm threshold (180V AC by default). If yes, handle the AC input fault.


View more
  • x
  • convention：

simchamnan
simchamnan Created Oct 16, 2020 09:30:18 (0) (0)
thanks  
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2#
olive.zhao
olive.zhao Admin Created Oct 15, 2020 05:58:07

Hello, dear!
It's nice to meet you in the community.
We're working on your problem. Please be patient.
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3#
BetterMing
BetterMing Created Oct 15, 2020 06:13:57

Hello, dear.
I need you to provide more information about the alert. Such as alarm name or alarm code.

Maybe you can refer to the following information:

Solution

Possible Causes:
1) The AC Undervoltage alarm threshold is not set properly on the SMU.
2) The power grid is faulty.

Measures:

1) Check whether the AC Undervoltage alarm threshold is properly set. If no, adjust it to a proper value.

2) Check whether the AC input voltage is below the AC Undervoltage alarm threshold (180V AC by default). If yes, handle the AC input fault.


View more
  • x
  • convention：

simchamnan
simchamnan Created Oct 16, 2020 09:30:18 (0) (0)
thanks  
(0) (0)
4#
Unicef
Unicef MVE Created Oct 15, 2020 13:46:06

Dear User, hope below can help u:


Solution:
Possible Causes:
1) The AC input power cable is faulty.
2) The upper-level AC input circuit breaker is OFF.
3) The mains grid is faulty.
Measures:
1) Check whether the AC input cable is loose. If yes, secure the AC input cable.
2) Check whether the upper-level AC input circuit breaker is OFF. If yes, handle the back-end circuit failure and then switch on the circuit breaker.
3) Check whether the AC input voltage is lower than 50 V AC. If yes, handle the mains grid fault.

Thanks!

View more
  • x
  • convention：

simchamnan
simchamnan Created Oct 16, 2020 09:30:33 (0) (0)
very helpful  
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