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3.3 Trouble Shooting
3
3.3.3
CTB23 Circuit Board +24V System
Replace CTB23 circuit board.
Repair or replace harness.
Replace DC supply unit.
Is 2 pin of CTB1 connector on
CTB23 circuit board set to LOW
(drive power-ON signal)?
Check harness between
CTB1 on CTB23 circuit board and
PS5 on power supply unit.
HIGH
+24V
LOW
Malfunction
Normal