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http://biz.lgservice.com
Room Air Conditioner
SVC MANUAL(General)
MODEL : General Wall Mounted-Inverter Type
CAUTION
Before Servicing the unit, read the safety precautions in this SVC manual.
Only for authorized service personnel.
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Air Conditioner Service Manual CONTENTS Part 1 General Information 1. Safety Precautions........................................................................................................4 2. Nomenclature ...............................................................................................................7 Part 2 Functions & Controls 1. List of Functions & Controls........................................................................................9 2. Basic Mode Controls .
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Part 1 General Information 1. Safety Precautions ............................................................................................................4 2. Nomenclature......................................................................................................................7 Service Manual 3
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Part 1 General Information 1. Safety Precautions To prevent injury to the user or other people and property damage, the following instructions must be followed. Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is classified by the follow- ing indications. This symbol indicates the possibility of death or serious injury. This symbol indicates the possibility of injury or damage to properties only. Meanings of symbols used in this manual are as sho
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Part 1 General Information Do not use a defective or underrated circuit breaker. Use the correctly rated breaker and fuse. Otherwise there is a risk of fire or electric shock. Install the panel and the cover of control box securely. Otherwise there is risk of fire or electric shock due to dust, water etc. Indoor/outdoor wiring connections must be secured tightly and the cable should be routed properly so that there is no force pulling the cable from the connection terminals. Improper or loose
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Part 1 General Information 1.2 Inspections after Repair Check to see if the power cable plug is not dirty or loose. If the plug is dusty or loose it can cause an electrical shock or fire. Do not use a joined power cable or extension cable, or share the same power outlet with other electrical appliances. otherwise, it can cause an electrical shock, excessive heat generation or fire. Do not insert hands or other objects through the air inlet or outlet while the prod- uct is operating. There ar
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Part 1 General Information 2. Nomenclature 2.1 Global Model Name AS W1264GG1 12 - 3 456789 10 Code Type Code of Model Meaning 1 Production Center, A~Z L: Chang-won R22 Refrigerant A: Chang-won R410A 2 Product Type A~Z S: Split Type Air Conditioner 3 Cooling/Heating/Inverter A~Z C: Cooling Only H: Heat Pump X: C/O + E/Heater Z: H/P + E/Heater V: AC Inverter C/O N: AC Inverter H/P Q: DC Inverter C/O W: DC Inverter H/P 4, 5 Capacity 0~9 Cooling/Heating Capacity Ex. "09" 9,000 Btu/h 6 Electric
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Part 2 Functions & Controls 1. List of Controls & Functions ..........................................................................................9 2. Basic Mode Controls......................................................................................................10 3. Special Mode Controls...................................................................................................12 4. Utility Functions ........................................................................
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Part 2 Functions & Controls 1. List of Functions & Controls Category Function Description Remark Cooling Mode Cooling operation Heating Mode Heating operation Basic mode Healthy Dehumidification Dry operation controls Automatic operation Automatic operation Auto Changeover Cooling mode is automatically changed to heating mode and vice verse Jet Cool Powerful cooling mode Special Mode Jet Heat Powerful heating mode controls Energy saving Air volume & set temp. are automatically selected for
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Part 2 Functions & Controls 2. Basic Mode Controls 2.1 Cooling Mode Thermo ON +0.5°C(1°F) Setting Temp. -0.5°C(-1°F) Thermo OFF INV. Comp. High Low Comp. OFF High Low Frequency • Operating frequency of compressor depends on the load condition, like the difference between the room temp. and the set temp., frequency restrictions. • If the compressor operates at some frequency, the operating frequency of compressor cannot be changed within 30 seconds. ( not emergency conditions) • Compressor t
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Part 2 Functions & Controls 2.3 Healthy Dehumidification operation • When the dehumidification operation is set by the remote controller, the intake air temperature is detected and the set- ting temp. is automatically set according to the intake air temperature. Intake air Temp. Setting Temp. 26°C(78.8°F) ≤ intake air temp. 25°C(77°F) 24°C(75.2°F) ≤ intake air temp.< 26°C(78.8°F) intake air temp. -1°C(-2°F) 22°C(71.6°F) ≤ intake air temp. < 24°C(75.2°F) intake air temp. -0.5°C(-1°F) 18°C(64.4°
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Part 2 Functions & Controls 3. Special Mode Controls 3.1 Jet Cool operation • In the heating mode or Fuzzy operation, the Jet cool function does not work. When it is input while in other mode of operation (cooling, dehumidification, ventilation), the Jet cool operation takes place. • In the Jet cool mode, the indoor fan is operated at super-high speed for 30 min. at cooling mode operation. • In the Jet cool mode, the room temperature is maintained at a setting temperature of 18°C(64.4°F). • W
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Part 2 Functions & Controls 4. Utility Functions 4.1 Forced operation • To operate the appliance manually in case when the remote control is lost, the forced operation selection switch is on the main unit of the appliance, and operate the appliance in the standard conditions. • The operating condition is set according to the outdoor temp. and intake air temperature as follows. Setting speed of Operating Mode Indoor temp. Setting temp. indoor fan over 24°C(75.2°F) Cooling 22°C(71.6°F) 21~24°C(
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Part 2 Functions & Controls 4.3 Air volume control Step Description • Indoor fan motor control have 6 steps. LL Very low, In heating mode • Air volume is controlled "SH", "H", "Med", "Low" by the remote con- troller. L Low • "LL" step is selected automatically in Hot start operation. M Med H High SH Super high 4.4 Natural Air Control(Auto Wind) Auto Natural wind • When the Auto Step is selected and then operated, the high, medi- um, or low speed of the airflow mode is operated for 2~15 se
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Part 2 Functions & Controls 4.6 Sleep mode Auto control • When the set sleep time is reached set time of [1,2,3,4,5,6,7hour] input by the remote control during the operation, the operation of the appliance stops. • When the appliance is on pause, the sleep timer mode cannot be input. 4.6.1 Sleep timer operation for cooling cycle • While in cooling mode , 30 min. after the start of the sleep timer, the setting temperature increases by 1 C(2 . After another 30minutes lapse, it increases agai
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Part 2 Functions & Controls 5. Protection Functions & Controls 5.1 Five Seconds Stand-by (fan) • The indoor unit fan rotates after 5 seconds when unit is turned on. 5.2 Two Minutes Stand-by (comp.) • Compressor starts two minutes later, after it is turned off 5.3 Hot start • When unit starts in the heating mode to prevent cold wind blowing, the indoor fan does not rotate until the temp. of heat exchanger reaches 30°C(86°F)(model by model) 5.4 Freeze prevention (Protection of the evaporato
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Part 2 Functions & Controls 5.5 Automatic defrost 5.5.1 9,12kBtu/h Model • While in heating mode operation in order to protect the evaporator pipe of the outdoor unit from freezing, reversed to cooling cycle to defrost the evaporator pipe of the outdoor unit. • Defrosting control is available 40 minutes later since heating cycle started and the difference of the pipe tem- perature of outdoor unit reaches above option 1. • The defrosting control is available without reference to heating opera
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Part 2 Functions & Controls 5.5.2 18,24,30kBtu/h Model • Starting to the defrosting operation 1) Defrost operation will be start when the conditions below are matched a) Accumulation time of operation and the period after completion of defrost = 35 min. b) After 10 minutes from re-starting the compressor .In case of being over 35 minutes of accumulated operating time, defrosting operation starts after 10 minutes. c) Piping temperature of the outdoor heat exchanger maintain below defrost sta
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Part 2 Functions & Controls • Defrosting Control Algorithm 1) Lowering the compressor frequency when starts the defrosting operation. Constant speed compressor is ON after 10 seconds from the arrival time of 30 Hz (Option) frequency and is speed up its revolution till 100 Hz (Option) 2) Every EEV have 350 pulse (Option) of opening when starts defrosting operation. 3) Reversing valve is OFF after 5 seconds from arriving the compressor operating frequency of 30 Hz and then fans of indoor unit
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Part 2 Functions & Controls 5.6 Power Relay Control • Power relay turns on 1 second later after the power is supplied to the outdoor unit. • Control sequence : power on PTC operating power relay on 5.7 Inverter UV W + U 3Ø V Comp. Motor W 1. The single phase power AC is converted into DC. 2. The single phase power DC is converted into a three phase chopped DC voltage with a variable frequency. 3. When the frequency changes, the rotation speed of the compressor changes resulting in a
