Products Details:

FANUC NC controller, servo amplifier, servo power supply, control board, single control circuit board (motherboard, CPU board, backplane, plug-in board, power board, main board, I / O board, AXIS board, SPIF board, CRT board, PSU board, FSRM board, SRAM board, DRAM board, FSRM power board), etc.

Discrimination and repair of common faults in FANUC.

SVM failure: LED display 2, how to remove the alarm. SPM failure: LED display 19, how to remove the alarm?
SVM alarm Code 2.
(1) content: the frequency converter controls the low voltage of the power supply.
(2) main causes and elimination methods.
(a) confirms the 3-phase input voltage of the amplifier (should be greater than or equal to 0.85 times the rated input voltage).
(b) confirms the 24V power supply voltage output from PSM (normal: 22.8V or greater).
(c) confirm Connector, Cable (CXA2A/B).
(d) replace SVM.

SPM alarm codes 19, 20. 
The offset voltage of U phase (alarm code 19) and V phase (alarm code 20) current detection circuit is too large.Detect when powered on.
When an alarm occurs, please replace the SPM. When the SPM control printed circuit board has just been replaced, please confirm the insertion of the connector between the power unit and the SPM control printed circuit board.