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GENERAL AIRSTAGE TECHNICAL REFERENCE
ARTG45LHTA / ARTG54LHTA
with AOTG45LATL / AOTG54LATL
Specifications, dimensions, refrigerant system, diagnostics, test procedures, parts and accessories
Applicable combinations
Indoor: ARTG45LHTA / ARTG54LHTA
Outdoor: AOTG45LATL / AOTG54LATL
Quick navigation
Specifications Dimensions Refrigerant Electrical Diagnostics Test Run Pump Down Indoor Parts Outdoor Parts Accessories
1. Specifications
ItemARTG45LHTA + AOTG45LATLARTG54LHTA + AOTG54LATL
Power source240 V, 50 Hz, single phase
Cooling capacity12.5 kW14.0 kW
Heating capacity14.0 kW16.0 kW
Running current - Cooling16.9 A19.5 A
Running current - Heating16.0 A18.6 A
Input power - Cooling4.03 kW4.66 kW
Input power - Heating3.80 kW4.44 kW
E.E.R - Cooling3.10 kW/kW3.00 kW/kW
C.O.P - Heating3.68 kW/kW3.60 kW/kW
Moisture removal1.0 L/hr1.0 L/hr
Indoor air circulation3,250 m³/h3,550 m³/h
Outdoor air circulation - Cooling6,750 m³/h6,750 m³/h
Outdoor air circulation - Heating6,200 m³/h6,850 m³/h
Maximum current22.5 A23.5 A
Noise levels
LocationModeARTG45LHTAARTG54LHTA
IndoorHigh / Medium / Low43 / 39 / 35 dB45 / 40 / 36 dB
OutdoorCooling55 dB55 dB
OutdoorHeating55 dB56 dB
Fan motor references
Indoor discrimination: MFG-54AVN
ARTG45LHTA: High 1040/1000 rpm, Medium 880/840 rpm, Low 740/700 rpm
ARTG54LHTA: High 1090/1050 rpm, Medium 900/860 rpm, Low 780/740 rpm

Outdoor discrimination: MFE-45VVT
Cooling: Upper 850 rpm, Lower 800 rpm
Heating AOTG45LATL: Upper 780 rpm, Lower 750 rpm
Heating AOTG54LATL: Upper 850 rpm, Lower 830 rpm
2. Dimensions
UnitDimensions H × W × DWeightAdditional detail
Indoor425 × 1,250 × 490 mm61 kg shipping / 54 kg netDrain hose ID 23.4 mm / OD 25.4 mm
Outdoor1,290 × 900 × 330 mm94 kg shipping / 86 kg net—
3. Refrigerant system
ItemSpecification
CompressorHermetic inverter, 6-pole, 3-phase DC motor, twin rotary
Compressor discriminationN-TF30HD1A
Compressor weight15.4 kg including oil
RefrigerantR410A
Factory charge3,350 g
Additional charge40 g/m
Maximum pipe height30 m
Gas pipe15.88 mm (5/8")
Liquid pipe9.52 mm (3/8")
Pipe lengthTotal refrigerant charge
20 m3,350 g
30 m3,750 g
40 m4,150 g
50 m4,550 g
4. Electrical and circuit references
Use the source wiring diagrams for detailed connector pinouts and PCB-level tracing. The available references cover:
  • Indoor and outdoor overall circuit diagrams
  • Indoor control PCB
  • Outdoor inverter, power-supply and transistor PCBs
  • Indicator PCB and LED/button layout
5. Error detection and diagnostics
Wired remote controller
When a fault occurs, the wired controller shows an error code with Er in the set-temperature display and identifies the affected indoor-unit number.
Outdoor LED diagnostic workflow
Confirm the outdoor ERROR LED is blinking
↓
Press ENTER once
to step into the detailed fault display.
↓
Record the states of POWER, ERROR, PUMP DOWN, LOW NOISE, PEAK CUT and MODE LEDs L1-L6
↓
Match the blink count and LED state to the service-manual fault table
↓
Diagnose the identified group
Communication, sensor, inverter, pressure, fan motor, valve or refrigerant system.
6. Outdoor-unit test run
Pre-checks
  • Outdoor unit securely installed
  • Gas-leak inspection completed
  • Pipe and drain insulation completed
  • Drain discharge confirmed
  • Cables and earth conductor connected correctly
  • No airflow obstruction
  • Correct refrigerant charge
  • Gas and liquid stop valves fully open
  • Crankcase heater energised for more than 6 hours
Power ON and enter standby
↓
Press ENTER for more than 3 seconds
to enter test-run setting mode.
↓
Use SELECT to choose COOL or HEAT
Perform the first test run in COOL.
↓
Press ENTER to start
↓
Check noise, vibration and discharge-air temperature
↓
Press ENTER again to stop
7. Outdoor-unit pump down
Safety: Do not touch electrical components other than the display-board buttons. Ensure the compressor is stopped before removing refrigerant piping. Never disconnect piping while the compressor is operating with valves open.
Confirm liquid and gas 3-way valves are fully open
↓
Turn power ON and wait 3 minutes
↓
Press PUMP DOWN for at least 3 seconds
↓
Approximately 3 minutes after compressor start, fully close the liquid valve
↓
When the LED state changes again, fully close the gas valve
↓
Compressor and fans stop automatically. Turn power OFF.
To stop pump down, press PUMP DOWN again. If the sequence stops due to a fault: switch power OFF, reopen both valves, wait 3 minutes, restore power and retry. If pump down cannot be completed, recover refrigerant through the service port.
8. Indoor-unit parts
DescriptionPart number
Panel Top Sub Assy9380191001
Panel Rear Sub Assy9380205005
Panel Side R Sub Assy9380194002
Panel Side L Sub Assy9380203001
Pipe Panel9380262008
Drain Pan Sub Assy9380193005
S Drain Pan Sub Assy9380204008
Hook9372055007
Remote Control9318593020
Front Panel Assy9380271000
Sirocco Fan9372059029
Fan Motor9603087012
Controller PCB Assy - 459708281032
Controller PCB Assy - 549708281049
Power Supply PCB Assy9708279015
Filter PCB Assy9708277028
Thermistor9704265012
Pipe Thermistor9900558000
Room Thermistor9703299254
Evaporator Sub Assy9380206002
9. Outdoor-unit parts
DescriptionPart number
Top Panel Sub Assy9374417056
Front Panel Sub Assy9374414109
Service Panel Sub Assy9374415090
Right Panel Sub Assy9374416189
Motor DC Brushless9602843039
Propeller Fan Assy9366378020
Base Assy9374166220
Drain Assy9303029015
Drain Cap313166024302
Inverter PCB Assy - 459708690032
Inverter PCB Assy - 549708690049
Indicator PCB Assy9708678016
Power Supply PCB Assy9708688015
Capacitor PCB Assy9707257083
ACTPM9707592016
Transistor PCB Assy9708647043
Thermistor - Outdoor9900210069
Thermistor Assy - Heat Exchanger9900599027
Thermistor Assy - Discharge / Compressor9900598013
Compressor9810153005
Accumulator9379014021
Expansion Valve Assy9370947243
Expansion Valve Coil9970096044
4-way Valve Assy9374425235
Pressure Switch9900186012
Pressure Sensor9900505080
10. Accessories and optional parts
CategoryItems
Indoor accessoriesSpecial nuts A - large ×4, special nuts A - small ×4, large and small coupler insulation, binders, remote control and mounting screws
Optional partsWired remote control UTY-RNNYN, remote sensor UTY-XSZX, external control set UTD-ECS5A
Outdoor accessoriesDrain pipe ×1, drain caps ×2, binders ×3 and one-touch bushes ×2
Service note: This article is a consolidated field reference. Always confirm live measurements, connector pinouts, detailed error patterns and replacement part suitability against the applicable service manual, wiring diagram and current parts system before completing repairs.
GENERAL AIRSTAGE | ARTG45LHTA / ARTG54LHTA Service Reference

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