Remedy: 1 The irregular power supply is detected Replace the low voltage power supply PCB ASSY. Reset the irregular power supply detection counter following the procedure described in "5. IF YOU REPLACE THE PANEL UNIT" in Chapter 4. 2 Main PCB failure Replace the main PCB ASSY.
Code: F0
Description: USB flash memory does not work properly
Causes:
Remedy: 1 Malfunction of firmware Rewrite the latest firmware. 2 Main PCB failure Replace the main PCB ASSY.
Code: F9
Description: The country code is not entered properly.
Causes:
Remedy: 1 Power turned OFF while the function code 74 is being executed and “PARAMETER INTI” is being displayed Re-enter the country code. (Refer to "1.4.20 Setting by country (Function code 74)" in Chapter 5.)