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)
The following conditions will be concerned in use of back-up operation. (Please do not use the system with back-up operation for long time.)
- The operating compressor life time becomes shorter.
- The operating performance may drop due to the limited active compressor(s).
- The 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
Summary of Contents for Airstage UTP-RU01AH
Page 1: ...SERVICE MANUAL 208 230V 60Hz ...
Page 5: ...1 TEST RUN ...
Page 6: ......
Page 34: ...2 OUTDOOR UNIT OPERATION CONTROL ...
Page 59: ...3 INDOOR UNIT OPERATION ...
Page 60: ......
Page 82: ......
Page 83: ...4 TROUBLE SHOOTING ...
Page 84: ......
Page 186: ...04 96 0 24 AOUA120 208 230 AOUA72 90 0 19 RED WHITE BLACK U V W ...
Page 208: ...5 APPENDING DATA UNIT ...
Page 209: ......
Page 215: ...CASSETTE TYPE MODELS AUUB18TLAV AUUB24TLAV AUUB30TLAV AUUB36TLAV 05 06 ...
Page 217: ...MEDIUM STATIC PRESSURE DUCT TYPE MODEL ARUM24TLAV 05 08 MODEL ARUM30TLAV ARUM36TLAV ...
Page 218: ...HIGH STATIC PRESSURE DUCT TYPE MODELS ARUH36TLAV ARUH48TLAV ARUH60TLAV 05 09 ...
Page 219: ...FLOOR CEILING TYPE MODELS ABUA12TLAV ABUA14TLAV ABUA18TLAV ABUA24TLAV 05 10 ...
Page 220: ...CEILING TYPE MODELS ABUA30TLAV ABUA36TLAV INDOOR UNITS INDOOR UNITS 05 11 ...
Page 221: ...WALL MOUNTED TYPE MODELS ASUA7TLAV ASUA9TLAV ASUA12TLAV ASUA14TLAV 05 12 ...
Page 222: ...MODELS ASUB18TLAV ASUB24TLAV 05 13 ...
Page 224: ...MODEL UTP RU01AH MODEL UTP RU01BH 5 2 3 RB Unit 05 15 ...
Page 225: ...MODEL UTP RU01CH 05 16 ...
Page 226: ...MODEL UTP RU04BH 05 17 ...
Page 227: ...MODELS AAUA48TLAV 5 2 4 Outdoor Air Unit 05 18 MODELS AAUA72TLAV ...
Page 228: ...MODELS AAUA96TLAV 05 19 ...
Page 230: ...6 DISASSEMBLY PROCESS ...
Page 245: ......