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
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