Fujitsu Understanding Serial Communication Error and Trip Detection in Air Conditioners

Page 11

ERROR DETECTION

TROUBLESHOOTING

OPERATION lamp (green)

 

 

 

 

 

 

TIMER lamp

 

 

 

 

with the indoor unit display

(orange)

 

ECONOMY lamp (green)

 

Error

 

OPERATION

TIMER

ECONOMY

 

 

 

 

 

 

 

Serial communication error

 

1 flash

1 flash

 

 

 

 

 

 

 

 

Indoor unit PCB model information error

 

3

2

 

 

 

 

 

 

 

 

Manual auto switch error

 

3

5

 

 

 

 

 

 

 

 

Room temp. sensor error

 

4

1

 

 

 

 

 

 

 

 

Indoor unit Heat Ex. Middle temp.sensor error

 

4

2

 

 

 

 

 

 

 

 

Indoor unit fan motor error

 

5

1

 

 

 

 

 

 

 

 

Indoor unit error

 

5

15

 

 

 

 

 

 

 

 

Outdoor unit main PCB model

 

6

2

 

 

information error or communication error

 

 

 

 

 

 

 

 

Inverter error

 

6

3

 

 

 

 

 

 

 

 

Active filter error, PFC circuit error

 

6

4

Rapid flash

 

 

 

 

 

(0.1s on

 

Trip terminal L error

 

6

5

 

 

/ 0.1s off)

 

 

 

 

 

 

Display PCB microcomputers communication error

 

6

10

 

 

 

 

 

 

 

 

 

 

Discharge temp. sensor error

 

7

1

 

 

 

 

 

 

 

 

Outdoor unit Heat Ex. liquid temp. sensor error

 

7

3

 

 

 

 

 

 

 

 

Outdoor temp. sensor error

 

7

4

 

 

 

 

 

 

 

 

Current sensor error

 

8

4

 

 

 

 

 

 

 

 

Trip detection

 

9

4

 

 

 

 

 

 

 

 

Compressor rotor position detection error

 

9

5

 

 

 

 

 

 

 

 

Outdoor unit fan motor error

 

9

7

 

 

 

 

 

 

 

 

4-way valve error

 

9

9

 

 

 

 

 

 

 

 

Discharge temp. error

 

10

1

 

 

 

 

 

 

 

 

 

 

(0.5s on / 0.5s off)

 

2012.11.07

10

 

 

Image 11
Contents ASU9RL2 AOU9RL2 ASU12RL2 AOU12RL2 ContentsSpecifications Outdoor Unit DimensionsIndoor Unit Refrigerant System Diagram Main PCB Circuit DiagramOutdoor Unit Indoor Unit Control Unit ASU9RL2 EZ-0120PHSE ASU12RL2 EZ-0120RHSE Indoor PCB Circuit DiagramIndicator PCB ASU12RL2 K11CN-1201HSE-C1 ASU9RL2K11CN-1200HSE-C1 K11CO-1100HSE-D0 Indoor Unit Indicator PCBAOU9RL2 K12HZ-1200HUE-C1 AOU12RL2 K12HZ-1201HUE-C1 Outdoor PCB Circuit DiagramInverter Assembly AOU9RL2 EZ-012FHUE AOU12RL2 EZ-012LHUE K12HZ-1200HUE-C1 AOU9RL2Operation Timer Economy Error DetectionTroubleshooting Parts Control box 2726Fan Indoor Unit Casing assy ASU12RL2 Evaporator215 112 Outdoor Unit Outdoor Unit AOU9RL2 Outdoor Unit AOU12RL2 Accessories 1210G4122