OUTDOOR UNIT Error Method:
High Pressure Abnormal
1. 3-way valve not opened
2. Outdoor unit fan operation defective, foreign matter at heat exchanger, excessive ambient
temperature rise 3. EEV defective, strainer clogged
4. Solenoid valve defective 5. 4-way valve (including a coil) defective
6. Discharge pressure sensor defective 7. Refrigerant overcharged
Judgment from value sensed by discharge
pressure sensor
"Protection stop by "discharge pressure 580psi(4.00MPa)during operation of
any compressor"" generated 3 times within 60 minutes
EEV operation check
Check of strainers before and after EEV
Refer to "Service Parts Information 14".
Check Point 4 : 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 23".
Check Point 6 :Check the discharge pressure sensor
Check Point 7 : Check the refrigerant amount
Refrigerant charged amount check
Check Point 5 : Check the solenoid valve (SV1, SV2, SV4)
Check Point 3 : Check the EEV, strainer
Solenoid valve operation check. Refer to "Service Parts Information 18".
Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash,
Filter LED Continuous Flash.
Outdoor Unit : E. A 4. 1
Error Code : 9 U / A 4
OK
OK
OK
OK
OK
OK
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
Forecast of Cause :
Trouble shooting 63 EA4. 1
Indicate or Display:
Detective Actuators:
Detective details:
<Cooling/ Cooling main operation> <Heating/ Heating main operation>
EEV (EEV1, EEV2) open?
Strainer clogging check (before and after EEV, ACM, oil return)
Refer to "Service Parts Information 15, 16".
Check Point 4 : Check the 4-way valve (4WV1, 4WV2)
4-way valve operation check. Refer to "Service Parts Information 19".
Caution
By changing of DIP SW 4-2 to ON, the Back-up operation can start when the active outdoor unit exists on the multi outdoor unit connection.
(Stand alone outdoor unit is impossible)
T
he following conditions will be concerned in use of back-up operation. (Please do not use the system with back-up operation for long time.)
- T
he operating compressor life time becomes shorter.
- T
he operating performance may drop due to the limited active compressor(s).
- T
he compressor may stop frequently by protection controlling.
*In order to keep the operating capacity,
the release of the Low noise mode setting might be necessary.
04-72
To Next Page
Loading...
Need help?
General
