Fujitsu ASU7RLF1 Service Instructions Manual page 50

Trouble shooting 14
OUTDOOR UNIT Error Method:
Active Filter Error
Detective Actuators:
Outdoor unit Main PCB
Active filter module
Forecast of Cause :
1. External cause
Check Point 1 : Check external cause at Indoor and Outdoor (Voltage drop or Noise)
Instant drop : Check if there is a large load electric apparatus in the same circuit.
Momentary power failure : Check if there is a defective contact or leak current
Noise : Check if there is any equipment causing harmonic wave near electric line.
(Neon bulb or electric equipment that may cause harmonic wave)
Check the complete insulation of grounding.
O OK K
Check Point 2 : Check connection of Connector
Check if connector is removed.
Check erroneous connection.
Check if cable is open.
>>Upon correcting the removed connector or miss-swiring, reset the power.
OK
Check Point 3 : Check Active filter module
Check Active filter module. (PARTS INFORMATION 6)
>>If Active filter module is abnormal, replace it.
OK
Check Point 4 : Replace Main PCB
If Check Point 1 - 3 do not improve the symptom, change Main PCB.
Indicate or Display:
Outdoor Unit :
Indoor Unit
ERROR CODE : [E : 64]
Detective details:
When inverter input DC voltage is higher than 425V or
lower than 80V.
When a momentary power cut off occurred on low voltage
2. Connector connection failure
in the power supply circuit.
LED 1 : 22 time Flash
: Operation lamp: 6 time Flash, Timer lamp: 4 time Flash
Economy lamp: Continuous flash.
3. Main PCB failure 4. Active filter module failure
02-18