It is normal for iSTAR Pulsar to show red LEDs when initially powered up, this is part of the startup process. The lights should change within a few minutes - when they both go solid green, the device is ready for use.
If you see red LEDs at any time other than upon initial startup, then your device has encountered an issue, and must be power cycled. If the issue reoccurs, then please get in touch with our support team, who can assist further.