Fujitsu AU G18LVLB Series Service Instruction page 85
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Also See for AU G18LVLB Series:
- Design & technical manual (253 pages) ,
- Service instruction (70 pages) ,
- Service instruction (122 pages)
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Trouble shooting 41
OUTDOOR UNIT Error Method:
Suction Pressure Sensor Error
Detective Actuators:
Suction pressure sensor
Forecast of Cause :
1. Suction pressure sensor connector disconnection, open
2. Suction pressure sensor defective
3. Main PCB defective
Check Point 1 : Check the suction pressure sensor connection state
Connector connection state check
Cable open check
OK
Check Point 2 : Check the suction pressure sensor
Sensor characteristics check
* For the characteristics of the suction pressure sensor,
refer to the "Service Parts Information 9".
OK
Check Point 3 : Check voltage of Main PCB (DC5.0V)
Main PCB (CN119:1-3) voltage value = 5V
Remove the sensor from Main PCB, check the voltage.
Suction pressure sensor (CN119:1-3)
If the voltage does not appear, replace Main PCB and set up original address.
Indicate or Display:
Indoor Unit : Operation lamp: 8 time Flash,
Timer lamp: 6 time Flash
Economy lamp : Continuous flash.
ERROR CODE : [E : 86]
Detective details:
When any of the following conditions is satisfied, a suction pressure
sensor error is generated.
1. 30 seconds or more have elapsed since the outdoor unit power was turned
on and pressure sensor detected value
or more.
2. 30 seconds or more have elapsed since the outdoor unit power was turned
on and pressure sensor detected value
PS
1 2 3
1 2 3
CN119
DC
02-46
Outdoor unit :
PUMP
LOW
POWER
DOWN
NOISE
ERROR
MODE
(L1)
(L2)
(L3)
(L4)
6
2
8
0.06V continued for 30 seconds
5.0V was detected.
PEAK
CUT
(L5)
(L6)
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Troubleshooting
