3-4 ELECTRONIC EXPANSION VALVE CONTROL
03-10
3-5 DRAIN PUMP OPERATION
1. Initialization
2. Operation Control
When starting up
Automatic operatic control
Automatic PI control is performed based on the indoor unit heat exchanger outlet temp and inlet temp.
Room temperature control
The room temperature is controlled so that it reaches to the set-up temperature based on the difference
between the room temperature and the set-up temperature, and the change of indoor unit temperature.
Cooling operation: if the room temperature becomes 0.5 C lower than the set-up temperature, EEV is fully closed.
Heating operation: if the room temperature becomes 0.5 C Higher than the set-up temperature, EEV is slightly opened.
*In case of protection controlling, EEV keeps open position.
3. Special Control
(1) When cooling and refrigerant circulation starts, the drain pump starts simultaneously.
(2) The drain pump operates continuously for 3 minutes after the refrigerant circulation stopped.
(3) When the refrigent circulation is stopped by a start of indoor heat exchanger frost prevention
operation, the drain pump will turn off in 1 hour after the end of indoor heat exchanger frost
prevention operation.
(4) When the water level in the drain pan rises up and then the float switch functions:
Microcomputer stops the refrigerant circulation and indoor fan motor operation.
Drain pump operates continuously for 3 minutes after the float switch is turned off.
(Almost condensing water may be drained)
(5) When the float switch turns ON continuously for 3 minutes, 'FAILURE INDICATION' operates.
(6) When the float switch turns OFF within 3 minutes, the unit starts cooling operation.
1
2
When the power is turned ON.
When it has passed the limited time since the last initialization.
When indoor unit stopping by Thermo-OFF condition.
Oil recovery operation : Controlled pulse(Maximum 1400 puls)
Test run operation : Controlled pulse.
Freeze prevention control : Fully closed.
Vacuuming operation : Fully open.
Defrost operation : Controlled pulse(Maximum 1400 puls)
Outdoor unit Condition
EEV Condition
Cooling
Heating
Fully closed
Slightly open
(Cooling) Move to the cooling control base pulse in steps.
(Heating) Move to the heating control base pulse in steps.
OFF
Fully closed
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: ......