3-4 ELECTRONIC EXPANSION VALVE CONTROL for Outdoor air unit
03-14
3-5 DRAIN PUMP OPERATION for Outdoor air unit
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.
Discharge airflow temperature control
The discharge airflow temperature is controlled so that it reaches to the set-up temperature based on the difference
between the discharge airflow temperature and the set-up temperature.
Cooling operation: 1) If the discharge airflow temperature becomes 5°C lower than the set-up temperature,
EEV is fully closed.
2) If the suction airflow temperature becomes 0.5°C lower than the set-up temperature,
EEV is fully closed.
Heating operation: 1) If the discharge airflow temperature becomes 5°C higher than the set-up temperature
for 5 minutes or more, EEV is fully closed.
2) If the suction airflow temperature becomes 0.5°C higher than the set-up temperature,
EEV is fully closed.
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
Fully closed
(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 UTP-VX30A
Page 1: ...SERVICE MANUAL ...
Page 5: ...1 TEST RUN ...
Page 27: ...2 OUTDOOR UNIT OPERATION CONTROL ...
Page 40: ...3 INDOOR UNIT OPERATION ...
Page 70: ...4 TROUBLE SHOOTING ...
Page 205: ...5 APPENDING DATA ...
Page 210: ...05 04 1 MODELS AUXK018 024 030 034 036 045 054GLAH AUXM018 024 030GLAH CASSETTE TYPE ...
Page 214: ...05 07 LOW STATIC PRESSURE DUCT TYPE MODEL ARXB24GALH ARXB30GALH ARXB36GALH MODEL ARXB45GALH ...
Page 217: ...05 10 MODEL ARXC36GBTH MODELS ARXC72GBTH ARXC90GBTH ...
Page 218: ...05 10 1 MODELS ARXK04 07 09 12 14 18 24GCLH COMPACT SLIM DUCT TYPE ...
Page 219: ...FLOOR CEILING TYPE MODELS AB A12GATH AB A14GATH AB A18GATH AB A24GATH 05 11 ...
Page 220: ...CEILING TYPE MODELS AB A30GATH AB A36GATH AB A45GATH AB A54GATH 05 12 ...
Page 222: ...05 14 WALL MOUNTED TYPE MODELS AS A04GACH AS A07GA H AS A09GA H AS A12GA H AS A14GA H ...
Page 223: ...05 15 MODELS AS A18GA H AS A24GA H AS A30GA H ...
Page 224: ...05 15 1 MODELS ASYA004 007 009GTAH ASHA004 007 009GTAH COMPACT WALL MOUNTED TYPE EEV internal ...
Page 225: ...05 15 2 MODELS ASYE004 007 009GTAH ASHE004 007 009GTAH COMPACT WALL MOUNTED TYPE EEV external ...
Page 227: ...05 15 4 MODELS ASYA030 034GTAH ASHA030 034GTAH ...
Page 230: ...05 16 MODEL ARXH054GTAH OUTDOOR AIR UNIT MODEL ARXH072GTAH ...
Page 231: ...05 17 MODEL ARXH096GTAH ...
Page 232: ...MODELS AJ 072LELAH AJ 090LELAH UNITS 5 2 2 Outdoor Unit 05 18 ...
Page 233: ...MODEL AJ 108LELAH OUTDOOR 05 19 ...
Page 240: ...6 DISASSEMBLY PROCESS ...
