The diagnostic readout 001000 has a fault number FL72 and fault name ARMOP and means the armature circuit is open (L, T).

-The DC fuse is blown (regenerative drives only).

-The armature circuit is open.

-The brushes are missing or disconnected.

-The 5PL is disconnected or damaged.

-The main contractor is not picking up -check the piolet relay operation. 

-Loss of current feedback - check 1PL-20 and DRPL.

-P2-CFB ZERO on the Power Supply card is misadjusted.

-Power Supply card has failed and needs to be replaced.

-The Control card has failed and needs to be replaced. 

The diagnostic readout 001001, 001010, 001011, 001100, 001101, 001110 has a fault number FL73, FL74, FL75, FL76, FL77, FL78, and fault names A1ROP, A2ROP, A3ROP, A4ROP, A5ROP, A6ROP (respectively) means the SCR AXR is not operating (L, T), where "X" = 1,2,3,4,5,or 6. 

-The low current test maybe enabled - run a high current test.

-The Gate circuit is disconnected or open.

-The 5PL is disconnected or damaged.

-The SCR has failed - check and replace if necessary.

-Replace Power Connection card.

-Replace Control card. 

The diagnostic readout 001111 has a fault number FL79 and a fault name REVOP and means all of the reverse SCRs are not operating (L, T).

-The low current test may be enabled - run a high current test.

-The 5PL is disconnected or damaged.

-The ADR002-REGJP is not set correctly for non-regenerative drives. 

-Replace Power Connection card.