Compressor cranks but does not want to start.

Hi, I have 2 Doosan/Ingersoll Rand 7/120 diesel compressors with John Deere Engines. These machines are fairly new but recently after being used on a project, just failed to start again. Let us first deal with the first one's symptoms: It cranks but fail to start. There is diesel in the tank and fuel line and eject diesel at the injector tips. However after every attempt to start the control panel shows two Fault codes which do not appear in the operators manual under fault finding. These codes are: Code 157 and 652. Please can you help? Many thanks, Andre van Zweel