Fujitsu ASU24RLF Service Instruction

<Cooling operation>
OK
<Heating operation>
Check Point 1 : Check if 3-way valve(gas side) is open.
Discharger thermistor characteristics check
(Check by disconnecting thermistor from PCB.)
* For the characteristics of the thermistor, refer to the "Trouble shooting 16".
Check Point 4 : Check the discharge thermistor
EEV open?
Check Point 3 : Check the outdoor unit fan,heat exchanger
Check for foreign object at heat exchanger
Check Point 2 : Check the EEV, strainer
Leak check
Check Point 2 : Check the EEV, strainer
If the 3-way valve(gas side) was closed, open the
3-way valve(gas side) and check operation.
02-33
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.
OK
Detective Actuators:
Detective details:
Forecast of Cause :
Trouble shooting 29
OUTDOOR UNIT Error Method:
Compressor Temp. Error
Indicate or Display:
Refer to error code table.
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
6. Main PCB failure
Strainer clogging check
(Refer to PARTS INFORMATION 3)
EEV open?
Check Point 5 : Check the refrigerant amount
Motor check (PARTS INFORMATION 5)
Check if fan can be rotated by hand.
Strainer clogging check
(Refer to PARTS INFORMATION 3)
"Protection stop by
"compressor temperature 230°F(18/24type)/257°F(36type)
during compressor operation"" generated 2 times within 24 hours.
Compressor temperature thermistor
OK
OK
OK
OK

Fujitsu ASU24RLF Specifications

General

Brand	Fujitsu
Model	ASU24RLF
Category	Air Conditioner
Language	English