Yaskawa GPD503 Drive - Manual (Page 110)

INDICATION
(DISPLAY) FAILURE INDICATION ITEM DESCRIPTION
ou Overvoltage Internal monitor of DC Bus voltage indicates that input
(blinking) AC power is excessively high, while GPD 503 is in
stopped condition.
ou Overvoltage (OV) Detection level: Approx. 400V for 230V GPD 503;
Approx. 800V for 460V GPD 503 (700V if Cn-01 < 400);
Approx. 1000V for 575V GPD 503.
Reset level: 385V.
r r Regenerative transistor Dynamic Braking resistor has failed.
failure
r H Braking resistor unit Dynamic Braking resistor has overheated.
overheated
Uu Low voltage (Power UV) Internal monitor of DC Bus voltage indicates that input
(blinking) AC power is below Undervoltage detection level, while the
GPD 503 is in stopped condition.
Uu1 Low voltage (Power UV) Occurs two seconds after detection of low voltage.
(See "Undervoltage" specification, under "Protective
Functions", in Appendix 2.)
Uu2 Low voltage (Control UV) Control circuit voltage levels drop below acceptable
levels during operation.
Uu3 Low voltage (MC-ANS fault) Main circuit magnetic contactor does not
operate correctly.
Table 6-1. Failure Indication and Details - Continued
INDICATION
(DISPLAY) FAULT DESCRIPTION
6-3