Trouble shooting 65
OUTDOOR UNIT Error Method:
Low Pressure Abnormal
Indicate or Display:
Detective Actuators:
Detective details:
Forecast of Cause :
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. Low pressure sensor characteristics defective 7. Insufficient refrigerant
Suction pressure sensor
"Protection stop by "suction pressure 0.10MPa continued
for 10 minutes" or "suction pressure 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 operation check
Strainer not clogged?
Refer to "Service Parts Information 9".
Check Point 4 : Check the outdoor unit EEV, strainer clogging
Indoor unit EEV operation check
Strainer not clogged?
Check Point 2 : 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 15".
Check Point 3: Check the suction pressure sensor
Check Point 4 : Check the refrigerant amount
Leak check
Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash,
Filter LED Continuous Flash.
Outdoor Unit : E. A5. 1
Error Code : A5
<Cooling operation> <Heating 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.
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
OK
OK
OK
OK
E. A5. 1
04-73
OK
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