Page 2 - Air Conditioner Service Manual; CONTENTS; Part 1 General Information
- 2 - Only for training and service purposes Air Conditioner Service Manual CONTENTS Part 1 General Information 1. Safety Precautions ........................................................................................................4 Part 2 Functions & Controls 1. List of Functions & C...
Page 4 - Safety Precautions; Cautions in Repair; Be sure to follow the instruction.
- 4 - Only for training and service purposes Part 1 General Information 1. Safety Precautions 1.1 Cautions in Repair To prevent injury to the user other people and property damage, the following instructions must be followed. ■ Incorrect operation due to ignoring instruction will cause harm or damag...
Page 6 - Inspections after Repair
- 6 - Only for training and service purposes Part 1 General Information Check to see if the parts are mounted correctly and wires are connected.Improper installation and connections can cause an electric shock or an injury. Check whether the installation platform or frame has corroded. Corroded inst...
Page 7 - Part 2 Functions & Controls
- 7 - Only for training and service purposes Part 2 Functions & Controls 1. List of Controls & Functions ..........................................................................................8 2. Basic Mode Controls ...........................................................................
Page 8 - Category
- 8 - Only for training and service purposes Part 2 Functions & Controls 1. List of Functions & Controls Cooling ModeHeating ModeHealthy DehumidificationAuto Changeover Jet CoolJet HeatEnergy saving Forced operationAuto Clean Air volume control Natural Air control Chaos SwingSleep mode Auto ...
Page 9 - Basic Mode Controls; Heating Mode Heatpump Only
- 9 - Only for training and service purposes Part 2 Functions & Controls 2. Basic Mode Controls 2.1 Cooling Mode SettingTemp. -0.5 ° C(-1 ° F) +0.5 ° C(1 ° F) Comp. OFF Thermo ON Thermo OFF INV. Comp.Frequency Low High Low High • Operating frequency of compressor depends on the load condition, l...
Page 10 - Healthy Dehumidification operation; Auto changeover operation Heatpump Only
- 10 - Only for training and service purposes 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 ...
Page 11 - Special Mode Controls; Jet Cool operation; Jet Heat operation Heatpump Only; Energy saving operation in cooling mode
- 11 - Only for training and service purposes 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...
Page 12 - Auto cleaning operation
- 12 - Only for training and service purposes Part 2 Functions & Controls 4. Utility Functions 4.1 Forced operation • To operate the appliance manually if the remote control is lost. The forced operation selection switch is on the main unit of the appliance and will operate the appliance in the ...
Page 13 - Air volume control; Sleep timer operation for cooling cycle; Step
- 13 - Only for training and service purposes Setting temp. (˚C) 1.0˚C(2˚F) up 1.0˚C(2˚F) up Cooling ON temp.(Setting temp. +0.5˚C(+1˚F)) Cooling OFF temp.(Setting temp. -0.5˚C(-1˚F)) 0.5 1 Sleep time (hour) Part 2 Functions & Controls 4.3 Air volume control • Indoor fan motor control have 6 ste...
Page 14 - Sleep timer operation for heating cycle Heatpump Only
- 14 - Only for training and service purposes Part 2 Functions & Controls 4.6.2 Sleep timer operation for heating cycle Heatpump Only • While in heating mode, 60 min. after the start of the sleep timer, the setting temperature decreases by 1 ° C(2 °F) . After another 60minutes lapse, it decrease...
Page 15 - Hot start Heatpump Only; NOTE
- 15 - Only for training and service purposes Part 2 Functions & Controls 5.1 Five Seconds Stand-by (fan) • The indoor unit fan will begin to rotate after 5 seconds of the unit being turned on. 5.2 Two Minutes Stand-by (comp.) • After the compressor cycles off, it will not restart for a minimum ...
Page 16 - Compressor Preheating Heatpump Only; Outdoor Temperature
- 16 - Only for training and service purposes Part 2 Functions & Controls 5.5 Compressor Preheating Heatpump Only 5.5.1 9,12kBtu/h Model With low outdoor temperature, preheating the compressor compressor is neccessary to maintain the oil viscosi-ty before the unit starts.The preheating Mode preh...
Page 17 - Automatic defrost Heatpump Only
- 17 - Only for training and service purposes Part 2 Functions & Controls 5.5 Automatic defrost Heatpump Only 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, the unit is reversed to the cooling cycle to defrost ...
Page 18 - • Starting the defrosting operation; ) Defrost operation will start when the conditions below are met:
- 18 - Only for training and service purposes Part 2 Functions & Controls 5.5.2 18,24,30kBtu/h Model • Starting the defrosting operation 1) Defrost operation will start when the conditions below are met: a) Accumulation time of operation and the period after completion of defrost = 35 min. b) Af...
Page 19 - • Defrosting Control Algorithm; • Control algorithm of defrost completion
- 19 - Only for training and service purposes Part 2 Functions & Controls • Defrosting Control Algorithm 1) Lowering the compressor frequency starts the defrosting operation. Constant speed compressor is ON 10 seconds. 2) The EEV has an opening 350 pulse (Option) when starting the defrosting ope...
Page 20 - Power Relay Control
- 20 - Only for training and service purposes 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 1. The single phase power AC is con...
Page 22 - • Function
- 22 - Only for training and service purposes Part 2 Functions & Controls 5.8.2 18,24,30kBtu/h Model • Function : Power module failure is protected by checking the temperature of heat sink via a temperature sensor. • Heat sink sensor failure error Short Check : if temperature ≥ 130°C(266°F) Open...
Page 23 - Model
- 23 - Only for training and service purposes Part 2 Functions & Controls 5.9 Total Current Control (Over Current Protection) 5.9.1 9,12kBtu/h Model 1) CT1 control • If the operating current reaches CT1, the operating frequency of the compressor decreases. • After decreasing the operating freque...
Page 25 - DC Peak Current Error by a fault signal of IPM; DC Peak Current Error by the compressor lock; Discharge Pipe Temp Control
- 25 - Only for training and service purposes Part 2 Functions & Controls 5.10 DC Peak control 5.10.1 DC Peak Current Error by a fault signal of IPM • If the operating current of IPM reaches 35A ± 3A, the compressor stops instantly. • If DC PEAK occurs 5 times within 1 hour, the appliance turns ...
Page 27 - ) Compressor working
- 27 - Only for training and service purposes Part 2 Functions & Controls 5.11.3 Constant Compressor (only 30kBtu/h Model) 1) There can be two situations (a) Temperature sensor is failed (Error Code 41) (b) Abnormal high temperature discharge temperature (error code for high discharge will be ge...
Page 28 - Low Ambient control
- 28 - Only for training and service purposes Part 2 Functions & Controls 5.12 Low Ambient control 5.12.1 9,12kBtu/h Model • If outdoor temperature drops below a certain temperature, liquid return is prevented by On/Off control of outdoor fan. • It can prevent frosting of evaporator and keep coo...
Page 29 - Operating condition :
- 29 - Only for training and service purposes Part 2 Functions & Controls 5.14 Oil equalizing control(30kBtu/h Model) Operating condition : 1) When the continuous inverter compressor running time at under 40 Hz(option) is over 2 hours(option) in 2 com- pressor system, oil restoring operation beg...
Page 30 - Part 3 Test Run
- 30 - Only for training and service purposes Part 3 Test Run Part 3 Test Run 1. Check before Test Run...................................................................................................31 2. Test Run Flow chart ............................................................................
Page 31 - Check before Test Run
- 31 - Only for training and service purposes Part 3 Test Run Check to see whether there is any refrigerant leakage, and check whether the power or transmissioncable is connected properly. Check whether the liquid pipe and gas pipe valves are fully opened. NOTE : Be sure to tighten caps. Confirm tha...
Page 32 - Yes; Test Run Flow chart
- 32 - Only for training and service purposes Part 3 Test Run Is cold air discharged for more than 3 minutes ? START Test operation for indoor unit Operation mode change to Heating mode Operate the unit in cooling mode. Does Test operation start? Refer to part4, Section 7: Electronic Troubleshooting...
Page 33 - Settlement of outdoor unit; Evaluation of the performance; Pump Down Procedure
- 33 - Only for training and service purposes Part 3 Test Run 1. Check that all tubing and wiring have been properly con- nected. 2. Check that the gas and liquid side service valves are fully open. Settlement of outdoor unit • Anchor the outdoor unit with a bolt and nut Ø0.39 inch tightly and horiz...
Page 34 - Part 4 Trouble Shooting
- 34 - Only for training and service purposes Part 4 Trouble Shooting 1. 2-Way, 3-Way Valve ........................................................................................................35 2. Pumping Down ........................................................................................
Page 36 - • Procedure; are set to the open position.
- 36 - Only for training and service purposes Part 4 Trouble Shooting • Procedure (1) Confirm that both the 2-way and 3-way valves are set to the open position. – Remove the valve stem caps and confirm that the valve stems are in the raised position. – Be sure to use a hexagonal wrench to operate th...
Page 37 - (1) Connect the vacuum pump to the center hose; (4) Disconnect the charge hose from the vacuum; Vacuum pump
- 37 - Only for training and service purposes Part 4 Trouble Shooting • Procedure (1) Connect the vacuum pump to the center hose of charge set center hose (2) Evacuation for approximately one hour. – Confirm that the gauge needle has moved toward 0.8 Torr (2PSF). (3) Close the valve (Lo side) on the...
Page 38 - (1) Connect the charge hose to the charging
- 38 - Only for training and service purposes Part 4 Trouble Shooting Lo Chargingcylinder Outdoor unit Indoor unit Liquid side Gas side Open 3-Wayvalve 3-Wayvalve OPEN Open Check valve (1) CLOSE VacuumGage • Procedure (1) Connect the charge hose to the charging cylinder. – Connect the charge hose wh...
Page 39 - Trouble analysis; NOTICE; Cycle Troubleshooting Guide
- 39 - Only for training and service purposes Part 4 Trouble Shooting Trouble analysis 1. Check temperature difference between intake and discharge air, and operating current. All amount of refrigerant leaked out. Check refrigeration cycle. Refrigerant leakageClog of refrigeration cycleDefective com...
Page 40 - Trouble 1; Procedure; Electronic Parts Troubleshooting Guide
- 40 - Only for training and service purposes Part 4 Trouble Shooting The Product doesn’t operate at all. (9~30kBtu/h Model) Turn off the main power and wait until LED on outdoor PCB is off. Turn on the main power again. "Beeping" sound is from the indoor unit? Flashing LED mounted on the ou...
Page 41 - Trouble 2
- 41 - Only for training and service purposes Part 4 Trouble Shooting Turn on main power. Wait 2 minutes for the compressor to turn on. When the compressor is stopped stopped, the Indoor Fan is driven by a low speed. At this point the air speed is not controlled by the remote controller. (When opera...
Page 42 - Trouble 3
- 42 - Only for training and service purposes Part 4 Trouble Shooting Turn on the main power. When in air circulation mode, compressor/outdoor fan is stopped. Turn off main power. Check the electrical wiring diagram of Outdoor side.Check the open or short of connecting wires between Indoor and Outdo...
Page 43 - Trouble 4
- 43 - Only for training and service purposes Part 4 Trouble Shooting Turn on the main power. When in air circulation mode, compressor/outdoor fan is stopped. Turn off main power. Check the electrical wiring diagram of Outdoor side.Check the open or short of connecting wires between Indoor and Outdo...
Page 44 - Trouble 5
- 44 - Only for training and service purposes Part 4 Trouble Shooting When indoor Fan does not operate.(9~30kBtu/h Model) Trouble 5 Check the SSR high speed operation by remote control. (the Indoor Fan Motor is connected) Turn off main power. Check the connection of CN-FAN. Check the Fan Motor. Chec...
Page 45 - Error Indicator
- 45 - Only for training and service purposes Part 4 Trouble Shooting 7. Self-diagnosis Function ■ Error Indicator • The error indicator assists with self-diagnoisis of the air conditioner and identifies if there is any trouble.• The error indicator location is near the ON/OFF button by the LED on t...
Page 46 - Indoor Error; Error code
- 46 - Only for training and service purposes Part 4 Trouble Shooting ■ 18,24,30kBtu/h Model Indoor Error 00 No Error ● ON 01 Indoor Room themistor error ● 1time ◑ OFF 02 Indoor in-piping sensor error ● 2times ◑ OFF 05 Communcation error between indoor and outdoor units ● 5times ◑ OFF 06 Indoor Out-...
Page 49 - Check flow
- 49 - Only for training and service purposes Part 4 Trouble Shooting 4 • Heat-sink thermistor is damaged(short or open). • Heat-sink Temp. is over 95 ° C(203 ° F) • Damage or defect on the sensing circuit of outdoor pcb assembly. (R01H, R02H, C01H) Heat-sink Temp. is over95 ° C(203 ° F) Heat-sink t...
Page 51 - Cause of error
- 51 - Only for training and service purposes Part 4 Trouble Shooting Cause of error 6 • Supplied power is not normal• Comp Connector (CN-U,V,W) is disconnected or inserted into the wrong position• Compressor is damaged (coil short) ➔ replace compressor • Too much Refrigerant• Defect in outdoor pcb ...
Page 55 - Error; Check Point
- 55 - Only for training and service purposes Part 4 Trouble Shooting 1) Troubleshooting CH01, CH02, CH06 Ω 10k Ω Check the resistance Check the voltage V 2.5VDC 01 02 06 Indoor air sensor Indoor inlet pipe sensor Indoor outlet pipe sensor • Open / Short• Soldered poorly• Internal circuit error • Op...
Page 57 - ) Troubleshooting CH21; Inverter; Comp
- 57 - Only for training and service purposes Part 4 Trouble Shooting 3) Troubleshooting CH21 Ω Comp Copperpipe Resistance( Ω ) at 20°C(68°F) Resistance( Ω ) at 20 ° C(68 °F) 0.64 0.64 0.64 Inverter comp. V-W W-U U-V Terminal 0.8 0.8 0.8 Constant comp. 2M Ω 2M Ω 2M Ω Inverter comp. V-GND W-GND U-GND...
Page 64 - Condenser/Suction Pipe
- 64 - Only for training and service purposes Part 4 Trouble Shooting 10) Troubleshooting CH51, CH60 60 EEPROM Check sum • Check sum error • Check the PCB ASM P/No.• Check for poor soldering. Display code Title Cause of error Check point & Normal condition Check Point • CH 60 1. Check the condit...
