Detective Actuators:
Detective details:
Forecast of Cause :
OK
OK
OK
OK
1. 3-way valve not opened 2. Outdoor unit ambient temperature too low
3. Outdoor unit fan operation defective, foreign matter at heat exchanger
4. EEV defective, strainer clogged 5. Solenoid valve defective 6. 4-way valve defective
7. Low pressure sensor characteristics defective 8. Insufficient refrigerant
Suction pressure sensor
"Protection stop by "suction pressure 15psi (0.10MPa)continued for 10 minutes"
or "suction pressure 7.25psi(0.05MPa)" during operation of any compressor"" was
generated 5 times within 3 hours
No foreign matter in air passage?
Heat exchange fins clogged
Fan rotates?
Outdoor unit fan motor check
Check Point 3 :
Check the outdoor unit fan operation, heat exchanger
Check Point 2 : Check the outdoor unit ambient temperature
Outdoor ambient temperature lower than operating range?
Outdoor unit EEV1, EEV2 operation check
Strainer not clogged?
Refer to "Service Parts Information 15,16 ".
Check Point 4 : Check the outdoor unit EEV, strainer clogging
Indoor unit EEV operation check
Strainer not clogged?
Check Point 4 :
Check the indoor unit EEV, strainer clogging
Suction pressure sensor characteristics check
* For the characteristics of the suction pressure sensor,
refer to "Service Parts Information 23".
Check Point 6 : Check the suction pressure sensor
Check Point 7 : Check the refrigerant amount
Leak check
Check Point 5 : Check the solenoid valve (SV1)
Solenoid valve operation check
Refer to "Service Parts Information 18".
Check Point 1 : Check if 3-way valve is open.
If the 3-way valve was closed, open the
3-way valve and check operation.
Check Point 1 : Check if 3-way valve is open.
If the 3-way valve was closed, open the
3-way valve and check operation.
OK
OK
OK
OK
After fixing the problem and for canceling the Error, Error Reset (F3-40) will be required after power reset
<Cooling/ Cooling main operation> <Heating/ Heating main operation>
Check Point 4 : Check the 4-way valve (4WV1, 4WV2)
4-way valve operation check.
Refer to "Service Parts Information 19".
Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash,
Filter LED Continuous Flash.
Outdoor Unit : E. A 5. 1
Error Code : 9 U / A 6
Indicate or Display:
Trouble shooting 65 EA5. 1
OUTDOOR UNIT Error Method:
Low Pressure Abnormal
04-74
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