!!
critical Petsafe
Error Code Rapid continuous flashing red LED
Error — contact customer service immediately.
? What Causes This
Unknown issue causing malfunction of the device.
✓ How to Fix It
1. Remove and wait 30 seconds before re-install batteries if still persists, contact customer care.
Source: page 7 of the official manual
From the manual
This error code appears in:
Petsafe Ppa44 16427 Microchip Cat Flap