Main control board for 590p dc thyristor drives. Included in the control assembly control door and fitted to all ratings and all frame sizes of 590p and 591p dc thyristor drives. Requires ah466405u001 besides this board for frame 3 drives. Fitted in 590pd and 590pxd control doors manufacturers part number ah500075u002 replaces, Ah470372u002 . Ah470372u002 was fitted to increase to version 7. 2 ah500075u002 is fitted to the current range and is backwards compatible for the older drives. Board is marked ah500075u002 replaces ah470372u002 configuration procedure, Power, On drive with up, E and prog keys pressed. Display will show m to set p code press m . Product code is shown. Press m then use up and/or down keys to select correct product code. Press e to save. Then e to exit each menu level. Drive will calibrate.