Alarm and fault messages

4.2 Alarm and fault messages

Table 4-9 Fault 36

(Alarm) AC contactor defective (no checkback), or Fast Stop button pressed

 

Condition

There is no signal at input 11/12 of the CU (green

 

 

connector); transferred via Profibus to the S7; drive has

 

 

received an ON command.

 

Causes

No power supply for Fast OFF

 

 

o Fast Stop button has been pressed

 

 

o Wire break in the Fast OFF circuit

 

 

o Defect in power supply for Fast OFF

 

 

o

Fire alarm system has been activated (if

 

 

 

installed)

 

 

No checkback signal from the AC contactor

 

 

o Defect in AC contactor control circuit (power

 

 

 

pack)

 

 

o Defect in AC contactor coil

 

 

o Defect in auxiliary contacts of AC contactor

 

 

o

Wire break

 

Measures

Unlock the Fast Stop button.

 

 

Replace the AC contactor

 

 

Unlatch the contacts of the AC contactor

 

 

Repair the cabling

Table 4-10 Fault 37

 

 

 

 

 

(Alarm) Several restart attempts in succession

 

 

 

Condition

The S7 has tried several times without success to

 

 

restart the drive

 

 

 

 

Causes

Fault in the drive

 

 

Operational fault (might be rectified automatically)

 

Measures

Repair the drive

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Image 33
Siemens SINVERT 350 manual Causes No power supply for Fast OFF, No checkback signal from the AC contactor

350, SINVERT 350 specifications

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