Hi,

We have a Crown RC5535-30. It is periodically throwing event code 745 and I am concerned i will soon be left with an inoperable forklift. We live in semi-rural BC and getting a technician here isn't easy or quick, especially at this time of year.

I have followed the reference guide for event code 745. The analyzer shows POT4 seems to be operating correctly but the ECR3 input seems inconsistent. Only showing 2 values, either -1 CNT or 0 CNT.

I have checked the power supply between CA602-1 and CA602-4 and I have a clean 5V.

I have checked continuity from CA602-3 and 602-2 to Access 7 (CA231-5 and CA231-4) and i have continuity.

The manual suggests to replace ECR3. Could someone give me some advice on how to go about this? I don't see how to get access to it?

I also tested the voltage of 602-2 and 602-3 to ground and got some unusual voltages. 2V and 21V. It does not pulse when the tiller is rotated.

When 602 is unplugged i have 12v between 602-3 and ground and 12v between 602-2 and ground.

Does this suggest a deeper fault? I can't find any shorted wires or damage.

Any advice would be greatly appreciated.