E1 99 (FJM Outdoor) — No pipe check operation performed

What does E1 99 mean?

The FJM outdoor unit displays E1 99, indicating that the pipe check operation was not performed, usually because the system was put into operation after installation using auto-addressing mode without completing this necessary check.

• Pipe check operation was skipped during installation
• Incorrect installation procedure followed
• Incorrect system setting for pipe check

Click steps to track your progress.

1. 1

   Turn off the main power to the unit at the circuit breaker.

2. 2

   Review the installation manual for the proper procedure to perform the pipe check operation after initial setup.

3. 3

   Access the system's settings via the remote control or service interface and initiate the pipe check operation.

4. 4

   If you are unsure how to complete this process, contact a qualified installer or technician for assistance.