Sounds like bad cyan developing unit. Was the machine setup and then delivered to you with all the consumables in the unit already... or was it unboxed and setup on site? You may need to pull all the DV units and give them a good shake to settle out the developer.
Note From Service... (parts of interest to you are red)
Solution ID
TAUS0800175EN* Solution Usage 0
Description
C-2804 (C2804) code.
Solution
CAUSE: Normally, replacing the Black Developing unit would correct the problem. Although the problem turned out to be a bad Cyan Developing unit which would normally generate a C-2803 code.
SOLUTION:When performing the Gamma correction adjustment, Cyan did not look correct. Replace the Cyan Developing unit (p/n A03U R706 00).
SPECIAL NOTE : Solution contribution by Matt Behling, KMBS - Waukesha, WI
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