Huayuan Electric NB-500HK, Instruction Manual, Page: 25 / 29

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7.3 Component list
No. Component name Component model Code Remarks
1 Air breaker DZ47-63/3P D63 QF1
2
3 phase Bridge
rectifier
MDS100-12 V1
3 IGBT module 2MBI100VA-120-50
V2
、
V3
4 Diode module MMF200ZB040DK1 V4
、
V5
、
V6
5 Hall sensor TKC500BR TA1
6
Control
transformer
TN06 TC1
7 Cooling motor 200FZY6-SF/AC220 EV1
8 Control board PN14 AP1
Table 8 Component list
8, Maintenance and repairing
Note: When maintain or repair, the power must be cut off.
8.1 Maintenance

User should open the case regularly according to the usage and environmental
conditions (at least once a year) to clean the internal dust with dry compressed air to
prevent the dust from being damp and cause short circuit in the machine to cause
malfunction;

User should check the installation connection regularly, ensure reliable connection.
8.2 Repairing

Only the person holding the electrician's operation permit can repair the welder

Before opening the welding machine, first check the three-phase voltage of the
incoming power of the welder, which should meet the national standards. After the
three-phase voltage is normal, check whether the fuse inside the machine is blown,
and then check the welding cable to ensure the connection is reliable and correct.