17.12.3 In the event of a communication failure between the active system and the standby system
If a communication failure occurs between the active system and the standby system, HA Monitor stops the server machine that caused the communication failure, and then shuts its power supply off.
First, re-start the server machine that stopped, and then eliminate the cause of the communication failure. Then, restore the corresponding host in the cold standby configuration. For details about how to restore a host to the cold standby configuration, see 17.12.4 Returning a system to the cold standby configuration.