Got a Dover DMC-I, 3 stop, front and rear, dual post telescopic jacks, getting an intermittent fault 66-000 (Dynamic sensor resynch Fault Critical):
(Tested when running to a floor)
Indicates the dynamic sensor detects the middle jackheads are 6l or more out of alignment. This activates Dual Post Shutdown Operation (Low Oil Operation).
• Jack Synchronization Problem
• Improper Adjustment or Failure of Dynamic re-synch sensor
• Defective I/0 Expansion Board


I have checked my pistons, when in a faulted state they are not out of synch at all. Always seems to be faulting out around the middle floor, but the sensors that are near my middle floor are triggering the static sensors I’m pretty sure, not the dynamic. We have changed the CLC and the I/O expansion boards, verified all sensors are turning on/off when they are supposed to, I’ve verified my 5vdc and my 12vdc power supply is sufficient. I have not changed any sensors, but I feel like that is my next step. Just was seeking some advice from anyone who has seen anything like this. I’ve been in the trade for over 13 years and this is the first DMC that I’ve seen with jack synch sensors. This was in the era of when TK was putting in DMCs and tried to incorporate their technology I suppose.