OUTDOOR UNIT Error Method:
High Pressure Abnormal
OK
OK
OK
1. 3-way valve not opened 2. Outdoor unit fan operation defective, foreign matter at heat
exchanger, excessive ambient temperature rise 3. Check valve clogged
4. EEV defective, strainer clogged 5. Solenoid valve defective
6. Discharge pressure sensor defective 7. Refrigerant overcharged
Judgment from value sensed by discharge
pressure sensor
"Protection stop by "discharge pressure 4.00MPa during
operation of any compressor"" generated 3 times within 60 minutes
EEV operation check
Check of strainers before and after EEV
Check Point 2 : Check the EEV, strainer (indoor unit)
No foreign matter in air passage?
Heat exchange fins clogged
Outdoor unit fan motor check
Ambient temperature not raised by effect of other heat sources?
Discharged air not sucked in?
Check Point 2 : Check the outdoor unit fan operation,
heat exchanger, ambient temperature
Discharge pressure sensor characteristics check
* For the characteristics of the discharge pressure sensor, refer to "Service Parts Information 15".
Check Point 4 :Check the discharge pressure sensor
Check Point 5 : Check the refrigerant amount
Refrigerant charged amount check
Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash,
Filter LED Continuous Flash.
Outdoor Unit : E. A4. 1
Error Code : A4
<Cooling operation>
OK
<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 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
OK
Forecast of Cause :
Trouble shooting 63
Indicate or Display:
Detective Actuators:
Detective details:
Refer to "Service Parts Information 8".
EEV(EEV 1) open?
Strainer clogging check. (before EEV)
Refer to "Service Parts Information 9".
Check Point 3 : Check the EEV, strainer
E. A4. 1
04-71
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