The solar cells themselves were on the -Z sides of the panels. There are three levels of anomaly response in the spacecraft flight software. The first, emergency mode, is entered in response to a command-loss timeout. Entry into emergency mode reconfigures the telecom subsystem to its lowest data rate settings to enhance the chances of successful contact from Earth. After a programmable period of time in emergency mode, the spacecraft transitions to contingency mode.
Safe mode is the deepest level of anomaly response.
The response to safe mode entry is similar to that of contingency mode. The primary function of the DSN is to provide two-way communications between the Earth and spacecraft exploring the solar system. Two of the complexes are located in the northern hemisphere while the third is in the southern hemisphere.