Fujitsu ASU30RLE Service Instruction page 71

Trouble shooting 32
OUTDOOR UNIT Error Method:
Compressor Temp. Error
Detective Actuators:
Compressor temperature thermister
Forecast of Cause:
1. 3-way valve not opened 2. EEV defective, strainer clogged
3. Outdoor unit operation failure, foreign matter on heat exchanger
4. Compressor temperature thermistor failure 5. Insufficient refrigerant
<Cooling operation>
Test 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
Test 2 : Check the EEV, strainer
EEV open?
Strainer clogging check (before and after EEV, ACM
oil return)
(SERVICE PARTS INFORMATION 3)
OK
Test 3 : Outdoor unit fan, heat exchanger check
Check for foreign object at heat exchanger
Check if fan can be rotated by hand.
Motor check (SERVICE PARTS INFORMATION 5)
OK
Test 4 : Check the compressor temperature thermistor
Compressor temperature thermistor characteristics check
(Check by disconnecting thermistor from PCB)
For the characteristics of the thermistor, refer to the Trouble shooting 19.
*
OK
Test 5 : Check the refrigerant amount
Leak check
Indicate of Display:
Indoor Unit :
Operation lamp: 10 times Flash,
Timer lamp : 3 times Flash
ERROR CODE : [E : A3]
Detective details:
Protection stop by "compressor temperature" >
operation"" generated 2 times within 24 hours.
<Heating operation>
Test 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.
Test 2 : Check the EEV, strainer
EEV open?
Strainer clogging check (before and after EEV, ACM
oil return)
(SERVICE PARTS INFORMATION 3)
OK
02-35
Outdoor unit :
PUMP LOW
POWER
DOWN NOISE
ERROR
(L1) (L2)
MODE
3
1 0
2
: Light OFF : Light ON
230°F (110°C)
OK
PEAK
CUT
(L3) (L4) (L5) (L6)
n : n times blinking
during compressor