When the blue LED flashes continually (when connected to the Space Station) it generally indicates there is a fault on the CanBus. Cause can be a few things, most likely its due to corrosion on the CanBus connections on the P2 connector. Or the CanBus protection diode pack on the main board (near the fuse) has been damaged.. short/leaky. The 6 pin diode protection pack is marked X2. Failing those, the CanBus controller IC may be faulty.
More often that not though its the P2 and or the X2 diode pack. We have had a high success rate repairing pumps exhibiting the flashing blue light syndrome. Also if the pump connect to a PC, the cause is generally the same, either P2 or the x2 diode pack. NB: Replacing the x2 chip is a nightmare if you don't have a video scope or a strong magnifying glass.
Cheers Jim
The Canberra Hospital
