Fujitsu AU G18LVLB Series Service Instruction page 81
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Also See for AU G18LVLB Series:
- Design & technical manual (253 pages) ,
- Service instruction (70 pages) ,
- Service instruction (101 pages)
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Trouble shooting 37
OUTDOOR UNIT Error Method:
Discharge Temp. Error
Detective Actuators:
Discharge temperature thermistor
Main PCB
Forecast of Cause :
1. 3-way valve not opened
2. EEV defective, strainer clogged
3. Outdoor unit operation
4. Discharge temperature thermistor
5. Insufficient refrigerant
<Cooling operation>
Check Point 1 : Check if 3-way valve(gas side) is open.
If the 3-way valve(gas side) was closed, open the
3-way valve(gas side) and check operation.
OK
Check Point 2 : Check the EEV, strainer
EEV open?
Strainer clogging check (before and after EEV, ACM
oil return)
Refer to "Service Parts Information 3 "
OK
Check Point 3 : Check the outdoor unit fan,heat exchanger
Check for foreign object at heat exchanger
Check if fan can be rotated by hand.
Motor check(PARTS INFORMATION 5)
OK
:
Check Point 4 : Check the discharge thermistor
Discharger thermistor characteristics check
(Check by disconnecting thermistor from PCB.)
* For the characteristics of the thermistor, refer to the "Service Parts Information 8"
and "Trouble shooting 25".
OK
Check Point 5 : Check the refrigerant amount
Leak check
Indicate or Display:
Indoor Unit : Operation lamp: 10 time Flash,
Timer lamp: 1 time Flash
Economy lamp : Continuous flash.
ERROR CODE : [E : A1]
Detective details:
"Protection stop by "discharge temperature
operation'''' generated 2 times within 24 hours.
failure
, foreign matter on heat exchanger
failure
<Heating operation>
Check Point 1 : Check if 3-way valve(liquid side) is open.
If the 3-way valve(liquid side) was closed, open the
3-way valve(liquid side) and check operation.
Check Point 2 : Check the EEV, strainer
EEV open?
Strainer clogging check (before and after EEV, ACM
oil return)
Refer to "Service Parts Information 3 "
OK
02-42
Outdoor unit :
PUMP
LOW
POWER
DOWN
NOISE
ERROR
MODE
(L1)
(L2)
(L3)
1
2
10
°C
115
during compressor
OK
PEAK
CUT
(L4)
(L5)
(L6)
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Table of Contents
Troubleshooting
