Daikin E603

Alarm Logic	Suction modulation valve (SMV) is not functioning correctly Electronic expansion valve (EV) connection is not connect
Possible Causes	SMV malfunction I/O board failure / SMV coil failure / controller failure EV is disconnected EV wiring is disconnected / EV connector is disconnected
Trouble Shooting	SMV malfunction Check CN9 connector on I/O board for proper connection or broken wire EV is disconnected Check CN11 connector on I/O board for proper connection or broken wire
Controller Action	E603 Backup operation