Daikin F603

Alarm
Logic		 F603
  • Incorrect controller model setting
  • If the suction modulating valve (SMV) does not fully close after commands from controller
Possible
Causes		 Incorrect controller model setting
  • Incorrect initial setting of controller type
Faulty suction modulation valve (SMV)
  • Faulty SMV body
  • Broken coil
  • Faulty operation cycle
  • Connector disconnected / Fuse Fu7 is open
Controller failure
Trouble
Shooting
  • Check controller type DECOS3 [g]
  • Check connector CN9 on I/O board
  • Replace fuse Fu7 if open
  • Check value of resistance for SMV. Blue-Red : 113Ω at degree 20 C / Orange-White :113Ω at degree 20 C
  • Check SMV coil disconnected. Replace as needed (refer to page 3-13)
  • Check SMV body. Replace as needed (refer to page 3-14)
Controller
Action
  • F603 Unit stopped
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