2 Functions Remote Control Illuminable buttons OFF/ON FAN SPEED Operation OFF / ON Indoor Fan Speed Selection • • Medium- MODE • Medium Operation Mode Selection • Medium+ • High • Automatic Operation • Automatic Fan Speed AUTO • Heating Operation HEAT •...
Indoor Unit Automatic Operation Switch Five Operation Modes • Press for < 5s to run Automatic Operation. • Automatic, Heating, Cooling, Soft Dry (Used when the remote control cannot be used.) and Fan Operation. • Press continuously for 5s and < 8s to run Forced Cooling Operation.
Outdoor Unit Time Delay Safety Control Breakdown Self Diagnosis Function 30 seconds Forced Operation Low Pressure Control (Gas Leakeage Detection) Overload Protection Control Indoor Power Relay Control Total Running Current Control Compressor Overheating Anti-Dew Formation Control Prevention Control Anti Freezing Control IPM (Power Transistor) Overheating Protection Control Anti-Cold Draft Control...
8 Operation Details 8.1. BASIC FUNCTION Inverter control, which equipped with a microcomputer in determining the most suitable operating mode as time passes, automatically adjusts output power for maximum comfort always. In order to achieve the suitable operating mode, the microcomputer maintains the set temperature by measuring the temperature of the environment and performing temperature shifting.
Table (b): Outdoor Air Temperature Shifting Mode: Outdoor Temperature, X (°C): Temperature Shift (°C) Manual Operation Auto Operation Cooling/Soft Dry 1.50 2.00 1.25 1.25 1.25 1.25 1.75 1.75 Heating -2.25 -1.50 -1.75 -1.00 -0.75 0.00 0.25 0.25 1.25 1.00 0.75 1.00 1.50 1.00...
8.1.2. Compressor Operation Frequency Intake Air Temperature - Internal Setting Temperature (°C) Freq. H Zone Cooling & Soft Dry Heating Cooling Soft Dry Heating Remark -2.0 -1.5 -1.0 -0.5 -0.5 -1.0 -1.5 -2.0 Fc, Fh -2.5 Fc, Fh -3.0 Fc, Fh -3.5 -4.0 Operating Frequency Calculation Formula:...
8.1.4. Soft Dry Operation 184.108.40.206. Thermostat control • Compressor is OFF when Intake Air Temperature - Internal Setting Temperature < -2.5°C. • Compressor is ON after waiting for 3 minutes, if the Intake Air Temperature - Internal Setting Temperature > Compressor OFF point.
Values of T1, T2, and T3 depend on remote control setting temperature, as shown in below table. After the adjustment of T1, T2 and T3 values, the operation mode for that particular environment and remote control setting is judged and performed, based on the above operation mode chart, every 30 minutes.
B. Indoor Fan Control i. Indoor fan control operation outline 1. Cooling / Dry 2. Heating...
ii. Auto Fan Speed 1. Cooling 2. Heating Note: a. UP: • If move from Lo, the fan speed will be shifted to Maximum 1520 rpm (E21CK), 1480 rpm (E18CK). • If move from Maximum, the fan speed no change. •...
iii. Max Capacity Condition a) During Cooling operation, if all to the following condition is fulfilled, the indoor fan speed is set to Shi. 1. Indoor intake temperature 24°C. 2. Operation frequency 72 Hz (E18CK), 95 Hz (E21CK) & above. 3.
D. Deodorizing Control i. Control condition Control at cooling/dry operation and auto fan speed. No Deodorizing Control is performed during ON timer standby operation and during Anti-freezing control prevention. ii. Operation The odor status is arranged as below and it is shifted as follow. 1 →...
Basic Rotation Speed 8.1.9. Airflow Direction 1. There are two types of airflow, vertical airflow (directed by horizontal vane) and horizontal airflow (directed by vertical vanes). 2. Control of airflow direction can be automatic (angles of direction is determined by operation mode, heat exchanger temperature and intake air temperature) and manual (angles of direction can be adjusted using remote control).
1. Automatic vertical airflow direction can be set using remote control; the vane swings up and down within the angles as stated above. For heating mode operation, the angle of the vane depends on the indoor heat exchanger temperature as Figure 1 below.
8.1.10. Quiet operation (Cooling Mode/Cooling area of Dry Mode) A. Purpose To provide quiet cooling operation compare to normal operation. B. Control condition a. Quiet operation start condition • When “quiet” button at remote control is pressed. Quiet LED illuminates. b.
220.127.116.11. Quiet operation (Heating) A. Purpose To provide quiet heating operation compare to normal operation. B. Control condition a. Quiet operation start condition • When “quiet” button at remote control is pressed. Quiet LED illuminates. b. Quiet operation stop condition 1.
8.1.11. Powerful Mode Operation When the powerful mode is selected, the internal setting temperature will shift to achieve the setting temperature quickly. (a) Cooling Operation (b) Soft Dry Operation (c) Heating Operation 8.1.12. Delay ON Timer Control Delay ON timer can be set using remote control, the unit with timer set will start operate earlier than the setting time. This is to provide a comfortable environment when reaching the set ON time.
8.1.14. Auto Restart Control 1. When the power supply is cut off during the operation of air conditioner, the compressor will re-operate within three to four minutes (there are 10 patterns between 2 minutes 58 seconds and 3 minutes 52 seconds to be selected randomly) after power supply resumes.
8.1.17. Indoor Power Relay Control Power relay will turn on during operation or in progress of stopping operation. Although operation stops, the power relay continues on for three minutes. However, during instantaneous power failure (< 0.5s), power relay will turn off. Then, it will turn on 2 minutes after power recover and the unit will operate as previous operation condition.
3. Ionizer operation status is not memorised by micon. After OFF, when operation is “ON” again, air conditioner operates without ionizer operation. c. Timer during ionizer operation Refer to case study in next page for detail. 18.104.22.168. Ionizer Problem Detection Control i.
8.2. Protection Control Features 8.2.1. Protection Control For All Operations 22.214.171.124. Time Delay Safety Control 1. The compressor will not start for three minutes after stop of operation. 2. This control is not applicable if the power supply is cut off and on again or after 4-way valve deices condition. 126.96.36.199.
188.8.131.52. IPM (Power transistor) Prevention Control A. Overheating Prevention Control 1. When the IPM temperature rises to 110°C, compressor operation will stop immediately. 2. Compressor operation restarts after three minutes the temperature decreases to 95°C. B. DC Peak Current Control 1.
184.108.40.206. CT Disconnection Detection 1. Control Starting Condition a. Total Current is below 0.74 ~ 0.94 Amp. b. Operating Frequency is 72 Hz (E18CK), 95 Hz (E21CK) +1 and above. c. Continuously for 20s. 2. Control Contents a. Abnormal signal transmitted to indoor unit after 3 minutes outdoor power is supplied. (Indoor unit stop) 3.
8.2.2. Protection Control For Cooling & Soft Dry Operation 220.127.116.11. Outdoor Air Temperature Control The compressor operating frequency is regulated in accordance to the outdoor air temperature as shown in the diagram below. 18.104.22.168. Cooling Overload Control i. Pipe temperature limitation/restriction •...
22.214.171.124. Anti-Freezing Control 1. When indoor heat exchanger temperature is lower than 2°C continuously for six minutes, compressor will stop operating. 2. Compressor will resume its operation three minutes after the indoor heat exchanger is higher than 10°C. 3. At the same time, indoor fan speed increase +40 rpm compared to its normal operation. 4.
8.2.3. Protection Control For Heating Operation 126.96.36.199. Anti Cold Draft Control Indoor fan speed varies in accordance to indoor heat exchanger temperature, based on type of air volume and direction, as shown below. 1. Manual Fan Speed 2. Auto Fan Speed...
Note: a. UP: • If move from Lo, the fan speed will be shifted to Maximum 1520 rpm (E21CK), 1480 rpm (E18CK). • If move from Maximum, the fan speed no change. • In up zone, 10 rpm is added for every 10s until Maximum 1520 rpm (E21CK), 1480 rpm (E18CK). b.
188.8.131.52. Overload Protection Control The compressor operating frequency is regulated in accordance to indoor heat exchanger temperature as shown in below figures. 184.108.40.206. Outdoor Temperature Control • Outdoor temperature is detected and the following control is perform. • Control operates after more than 1 minute the compressor has started.
220.127.116.11. Deice Control A. Deice operation (Normal Deice Operation) 1. Detection methods Outdoor heat exchanger temperature sensor, timer. 2. Deice operation time chart Notes a. During deice operation, the relationship between outdoor pipe temperature and time T1 is such operation will proceed to next stage.
3. Explanation of operation 1) Before the deice is started, compressor frequency is set to the specified value for T0-timer. 2) After deice is started, the 4-way valve, OD Fan and ID fan are OFF. 3) After 4-way valve is OFF for 30 s, compressor frequency is set to the specified value. 4) Before deice is ended, if the outdoor heat exchanger temperature exceeds a°C, set compressor frequency and expansion valve to the specified values.
3. Deice condition: OD air temp. t 0°C. OD heat exchanger temp. 0°C for 14 min. OD heat exchanger temp. -8°C for 10 min. 4. Auto clean deice time chart Similar to deice operation 2 except for frequency values. a. Detection methods Outdoor heat exchanger temp.
Notes 1. During deice operation, the relationship between outdoor pipe temperature and time T1 is such proceed to next operation. 2. The deice will be performed only after 1 hour from when the operation has started. 3. When Comp. OFF by the sequence No. 1, 6, 7 compressor can restart back without 3 minutes waits (immediate restart). Outdoor heat exchanger pipe temperature 15°C 18°C...
10 Installation And Servicing Air Conditioner Using R410A 10.1. OUTLINE 10.1.1. About R410A Refrigerant 1. Converting air conditioners to R410A Since it was declared in1974 that chlorofluorocarbons (CFC), hydro chlorofluorocarbons (HCFC) and other substances pose a destructive danger to the ozone layer in the earth´s upper stratosphere (20 to 40 km above the earth), measures have been taken around the world to prevent this destruction.
d. R410A refrigerating machine oil Conventionally, mineral oil or a synthetic oil such as alkylbenzene has been used for R22 refrigerating machine oil. Because of the poor compatibility between R410A and conventional oils like mineral oil, however, there is a tendency for the refrigerating machine oil to collect in the refrigerating cycle.
10.2.2. R410A Tools 1. Cooper tube gauge for clearance adjustment (used when flaring with the conventional flaring tool (clutch type)) • This gauge makes it easy to set the clearance for the copper tube to 1.0-1.5 mm from the clamp bar of the flaring tool.
5. Charging hose • The pressure resistance of the charging hose has been raised to match the higher pressure of R410A. The hose material has also been changed to suit HFC use, and the size of the fitting has been changed to match the manifold ports.
8. Electronic scale for refrigerant charging • Because of the high pressure and fast vaporizing speed of R410A, the refrigerant cannot be held in a liquid phase inside the charging cylinder when charging is done using the charging cylinder method, causing bubbles to form in the measurement scale glass and making it difficult to see the reading.
10.3. REFRIGERANT PIPING WORK 10.3.1. Piping Materials It is recommended that you use copper and copper alloy jointless pipes with a maximum oil adherence of 40 mg/10m. Do not used pipes that are crushed, deformed, or discolored (especially the inside surface). If these inferior pipes are used, impurities may clog the expansion valves or capillaries.
b. Copper pipes Use only copper pipes with the thickness given in table 10, and with minimal impurities. Because the surface of the pipe is exposed, you should take special care, and also take measures such as marking the pipes to make sure they are easily distinguished from other piping materials, to prevent mistaken use.
10.4.2. Transferring (Using New Refrigerant Piping) 1. Removing the unit a. Collecting the refrigerant into the outdoor unit by pumping down The refrigerant can be collected into the outdoor unit (pumping down) by pressing the TEST RUN button, even when the temperature of the room is low.
5. Set the refrigerant cylinder onto the electronic scale, then correct the hose the cylinder and to the connection port for the electronic scale. (1)(2) Precaution: Be sure to set up the cylinder for liquid charging. If you use a cylinder equipped with a siphon tube, you can charge the liquid without having to turn the cylinder around 6.
10.4.6. Brazing As brazing requires sophisticated techniques and experiences, it must be performed by a qualified person. In order to prevent the oxide film from occurring in the pipe interior during brazing, it is effective to proceed with brazing while letting dry nitrogen gas (N2) flow.
1. The equipment must be earthed. It may cause electrical shock if grounding is not perfect. 2. Do not install the unit at place where leakage of flammable gas may occur. In case gas leaks and accumulates at surrounding of the unit, it may cause fire. 3.
Attached accessories Indoor/Outdoor Unit Installation Diagram Applicable piping kit CZ-4F5, 7, 10AN (E18CK, E21CK) SELECT THE BEST LOCATION INDOOR UNIT • There should not be any heat source or steam near the unit. • There should not be any obstacles blocking the air circulation.
11.2. INDOOR UNIT 11.2.1. SELECT THE BEST LOCATION 11.2.3. TO DRILL A HOLE IN THE WALL (Refer to “Select the best location” AND INSTALL A SLEEVE OF section) PIPING 1. Insert the piping sleeve to the hole. 11.2.2. HOW TO FIX INSTALLATION 2.
3. For the embedded piping (This can be used for left rear piping & left bottom piping also.)
11.2.5. CONNECT THE CABLE TO THE INDOOR UNIT 1. The inside and outside connecting cable can be connected without removing the front grille. 2. Connecting cable between indoor unit and outdoor unit shall be approved polychloroprene sheathed 4 × 2.5 mm (E18CK, E21CK) flexible cord, type designation 245 IEC 57 or heavier cord.
AUTO SWITCH OPERATION The below operations will be performed by pressing the “AUTO” switch. 1. AUTO OPERATION MODE The Auto operation will be activated immediately once the Auto Switch is pressed. 2. TEST RUN OPERATION (FOR PUMP DOWN/SERVICING PURPOSE) The Test Run operation will be activated if the Auto Switch is pressed continuously for more than 5 sec. to below 8 sec. A “beep” sound will occur at the fifth sec., in order to identify the starting of Test Run operation 3.
CUTTING AND FLARING THE PIPING 1. Please cut using pipe cutter and then remove the burrs. 2. Remove the burrs by using reamer. If burrs is not removed, gas leakage may be caused. Turn the piping end down to avoid the metal powder entering the pipe.
11.3.5. CONNECT THE CABLE TO THE OUTDOOR UNIT 1. Remove the control board cover from the unit by loosening the screw. 2. Connecting cable between indoor unit and outdoor unit shall be approved polychloroprene sheathed 4 × 2.5 mm (E18CK, E21CK) flexible cord, type designation 245 IEC 57 or heavier cord.
12 Servicing Information Caution: • Pb free solder has a higher melting point than standard solder; Typically the melting point is 50 - 70°F (30 - 40°C) higher. Please use a high temperature soldering iron. In case of the soldering iron with temperature control, please set it to 700 ± 20°F (370 ± 10°C). •...
Troubleshooting Air Conditioner Refrigeration cycle system In order to diagnose malfunctions, make sure that there are no electrical problems before inspecting the refrigeration cycle. Such problems include insufficient insulation, problem with the power source, malfunction of a compressor and a fan. The normal outlet air temperature and pressure of the refrigeration cycle depends on various conditions, the standard values for them are shown in the table to the right.
1. Relationship between the condition of the air conditioner and pressure and electric current Cooling Mode Heating Mode Condition of the air conditoner Low Pressure High Pressure Electric current Low Pressure High Pressure Electric current during operation during operation Insufficient refrigerant (gas leakage) Clogged capillary tube or Strainer...
Error Codes Table Diagnosis Abnormality / Protection control Abnormality Emergency Primary location to verify display Judgement operation • Internal / external cable connections Indoor / outdoor abnormal > 1 min after starting Indoor fan operation communication operation only • Indoor / Outdoor PCB •...
12.3. Remote Control • Remote Control Reset When the batteries are inserted for the first time, or the batteries are replaced, all the indications will blink and the remote control might not work. If this happen, remove the cover of the remote control and push the reset point once to clear the memory data.
12.4. Indoor Electronic Controllers Removal Procedures 1. The Electronic Controller, a Signal Receiver and an Indicator (Fig. 3) can be seen by the below steps: • Open the Intake Grille and remove the screw at the front of the Front Grille. (Fig. 1). •...
12.5. Cross Flow Fan and Indoor Fan Motor Removal Procedures 1. In order to remove the Cross Flow Fan and Indoor Fan Motor, Control Board need to be taken out by releasing all the connectors as indicated below. a. Release the Earth Wire screw. (Fig. 5) b.
6. Remove the Bearing. (Fig. 9) 7. Remove the screws at the left of the Evaporator. (Fig. 9) Fig. 9 8. Push up the Evaporator and pull out the Cross Flow Fan from shaft. By then, Fan Motor can be taken out. (Fig. 10). REMINDER - To reinstall the Fan Motor, put it back in place, adjust the position of the Fan Motor’s leadwire appropriately as shown in the Fig.
12.6. Outdoor Electronic Controller Removal Procedure 1. Remove the top panel and front panel • Be save to return the wiring to its original position • There are many high voltage components within the heat sink cover so never touch the interior during operation. Wait at least two minutes after power has been turned off.
15 Replacement Parts List <Model: CS-E18CKE & CS-E21CKE> REF. NO. PART NAME & DESCRIPTION QTY. CS-E18CKE CS-E21CKE REMARKS ← CHASSY COMPLETE CWD50C1293 ← FAN MOTOR CWA981056 ← CROSS FLOW FAN COMPLETE CWH02C1010 ← SCREW - CROSS FLOW FAN CWH4580304 ←...
SCHEMATIC DIAGRAM 5/5 T101 ETXMJ326X1C NJM78M15F ERA2204-04 0.01 0.01 (FC) D8 ERB83-006 0.22 630V (MF) NJM78M05F 0.01 ERA22-04 4.7k 1/4W (FC) AUO1A x 3 0.47 630V HV1C1 0.047 (MDS) (FC) (FC) HV1C2 0.047 (FC) BLUE COMPRESSOR HV1C3 0.047 (FC) YELLOW LVIC U OUT 1000p x 3...
How to use electronic circuit diagram TIMER TABLE <INDOOR> Test mode Name Time (When test point Short-circuited) 4 way valve abnormality 4 min. 24 sec. Outdoor air temp. for Hz No. decision 30 min. 0 sec. Anti-dew formation control 20 min. 0 sec.