Troubleshooting - Daikin FWW Series Technical Manual

Chilled water fan coil units
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Troubleshooting

Troubleshooting
Model
FWW03/04/05/06L
FWKE05/08/11E(H)
FWC03/04/06/07/09/12/14/16C
FWC03/04/06/08/10/12/14/16/18/20G
FWC02/03/04/06/08/10/12G EC
FUD20/25/30B
Self Diagnostic Table - 50WJW Board
COOL/HEAT
(GREEN/RED)
Green
Red
1 time
2 times
4 times
ON
Board
50WJW
W3DC
No Controller
No Controller
No Controller
Normal Operation/Fault Indication
Cool mode
Heat mode
Timer on
Sleep mode on
Fan mode on
Dry mode on
Room air sensor contact
Loose/Short
Indoor coil sensor open/short
Pipe water temperature poor
3 times
Pipe water temperature bad
1 time
Hardware error (tact switch pin short)
6 times
No feedback from indoor fan
W2
ON or OFF
Action
Error Code
-
-
-
-
-
-
-
-
-
-
-
-
Call your dealer
Blink E1
Call your dealer
Blink E2
-
Blink E4
-
Blink E5
Call your dealer
Blink E8
Call your dealer
Blink E9
Blinking
125

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