Fujitsu ASYG12KMCF Service Manual

Check point 4. Check serial signal (Forward transfer signal)
Check serial signal (Forward transfer signal)
RED
WHITE
BLACK
BLACK
WHITE
GREEN
+
-
N
L
3
2
1
• Check if indicated value swings between AC 30 V and AC 130 V at outdoor unit terminal 2—3.
• If it is abnormal, replace main PCB.
↓
End
Check point 1-2. Check external cause such as noise
• Check if the ground connection is proper.
• Check if there is any equipment that causes harmonic wave near the power cable (Neon light
bulb or any electronic equipment which causes harmonic wave).
↓
End
2-2. E: 11. Serial communication error (Serial forward transfer error) (Indoor unit) - (03-23) - 2. Troubleshooting with error code
TROUBLESHOOTING TROUBLESHOOTING

Fujitsu ASYG12KMCF Specifications

General

Cooling Capacity	3.5 kW
Heating Capacity	4.0 kW
Seasonal Energy Efficiency Ratio (SEER)	6.1
Energy Efficiency Class (Cooling)	A++
Energy Efficiency Class (Heating)	A+
Power Supply	220-240 V, 50 Hz
Refrigerant	R32
Coefficient of Performance (COP)	4.0
Type	Split System
Outdoor Unit Noise Level	49 dB(A)