Frequently Asked Questions about 7VTHD504CD01
What does the diagnostic readout 111100 mean?
The diagnostic readout 111100 has a fault number FL60 and a fault name U6BAD and means the U6 ROM, timer or ALU bad (L,T)
-The U6 failed and needs to be replaced.
What does the diagnostic readout 111101 mean?
The diagnostic readout 111101 has a fault number FL61 and a fault name of U6ROM and means the U6 ROM is bad (L, T).
-The U6 has failed and needs to be replaced.
What does the diagnostic readout 111111 mean?
The diagnostic readout 111111 has a fault number FL63 and a fault name U6COM and means the U4 is not communicating correctly with the U6 (L, T).
-Check for PROM revision compatibility.
-Digital tach pulse rate exceeds 41,000 Hertz.
-Check for noise on tach input signals.
-FUP and TUP are in the wrong sockets.
What does the diagnostic readout 000001, 000010, 000011, 000100, 000101, 000110 mean?
The diagnostic readout 000001, 000010, 000011, 000100, 000101, 000110 has fault numbers FL65, FL 66, FL 67, FL 68, FL 69, FL 70 and fault names of A1FOP, A2FOP, A3FOP, A4FOP, A5FOP, A6FOP, and means the SCR AXF is not operating (L,T), where "X" = 1,2,3,4,5,or6.
-Low current test maybe enabled - run a high current test.
-Gate circuit is disconnected or open.
-The 5PL is disconnected or damaged.
- The SCR has failed- check and replace if necessary.
-Replace the Power Connection card.
-Replace the Control card.
What does the diagnostic readout 000111 mean?
The diagnostic readout 000111 has a fault number FL71 and a fault name FWDOP and means that all forward SCR's are not operating, (L, T).
-The low current test may be enabled- run a high current test.
-The 5PL is disconnected or damaged.
-Replace the Power Connection card.
-Replace Control card.
