Sinclair SCV-50EA Service Manual page 76

E9 malfunction: EEPROM malfunction
The malfunction may be caused by two reasons:
1) The EEPROM is not inserted well; 2) Outdoor main PCB is broken.
Check whether EEPROM is installed properly.
H0 malfunction : Communication malfunction between main chip and IPDU.
LED displays H0
Communication malfunction between main chip and IPDU
Whether the signal wire is connected normally between module board .
Judge whether LED on the module board flash normally or not
when powered on.
Replace module board.
LED displays E9
EEPROM malfunction
Yes
Replace main PCB.
YES
YES
NO
NO
NO
74
Installed properly again.
Connect wire again.
Replace main PCB.