CS-E18EKU CU-E18EKU / CS-E21EKU CU-E21EKU 12.2. Relationship Between The Condition Of The Air 14 Technical Data Conditioner And Pressure And Electric Current 14.1. CS-E18EKU CU-E18EKU 12.3. Breakdown Self Diagnosis Function 14.2. CS-E21EKU CU-E21EKU 12.4. Error Codes Table 15 Exploded View And Replacement Parts List 13 Disassembly and Assembly Instructions 15.1.
CS-E18EKU CU-E18EKU / CS-E21EKU CU-E21EKU 1 Safety Precautions • Read the following “SAFETY PRECAUTIONS” carefully before perform any servicing. • Electrical work must be installed or serviced by a licensed electrician. Be sure to use the correct rating of the power plug and main circuit for the model installed.
CS-E18EKU CU-E18EKU / CS-E21EKU CU-E21EKU 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.
CS-E18EKU CU-E18EKU / CS-E21EKU CU-E21EKU 9 Installation Instructions 9.1. Select The Best Location INDOOR UNIT Indoor/Outdoor Unit Installation Diagram • There should not be any heat source or steam near the unit. • There should not be any obstacles blocking the air circulation.
CS-E18EKU CU-E18EKU / CS-E21EKU CU-E21EKU 9.2. Indoor Unit 9.2.1. HOW TO FIX INSTALLATION 9.2.2. TO DRILL A HOLE IN THE WALL PLATE AND INSTALL A SLEEVE OF PIPING The mounting wall is strong and solid enough to prevent it from the vibration.
CS-E18EKU CU-E18EKU / CS-E21EKU CU-E21EKU 3. For the embedded piping (This can be used for left rear piping and left bottom piping also.)
CS-E18EKU CU-E18EKU / CS-E21EKU CU-E21EKU 9.2.4. INDOOR UNIT ELECTRICAL WIRING 1. Remove the control board metal cover. 2. Unscrew the conduit cover & fix the conduit connector to conduit cover with lock nut, then secure it against chassis. 3. Connecting wire between indoor unit and outdoor unit shall be UL listed or CSA approved 4 ×...
CS-E18EKU CU-E18EKU / CS-E21EKU CU-E21EKU 9.2.5. INSTALLATION OF AIR PURIFYING FILTER 1. Open the front panel. 2. Remove the air filter. 3. Put Air Purifying Filter into place as shown in illustration at right. 9.2.6. HOW TO TAKE OUT FRONT GRILLE Please follow the steps below to take out front grille if necessary such as when servicing.
CS-E18EKU CU-E18EKU / CS-E21EKU CU-E21EKU 9.3. Outdoor Unit 9.3.1. INSTALL THE OUTDOOR UNIT • After selecting the best location, start installation according to Indoor/Outdoor Unit Installation Diagram. 1. Fix the unit on concrete or rigid frame firmly and horizontally by bolt nut (ø13/32”).
CS-E18EKU CU-E18EKU / CS-E21EKU CU-E21EKU 9.3.3. EVACUATION OF THE EQUIPMENT WHEN INSTALLING AN AIR CONDITIONER, BE SURE TO EVACUATE THE AIR INSIDE THE INDOOR UNIT AND PIPES in the following procedure. 1. Connect a charging hose with a push pin to the Low side of a charging set and the service port of the 3-way valve.
CS-E18EKU CU-E18EKU / CS-E21EKU CU-E21EKU 9.3.4. OUTDOOR UNIT ELECTRICAL WIRING 1. Remove Top panel. 2. Remove Control Board Cover. 3. Remove Plugs. 4. Fix the conduit connectors to the conduit holes with lock- nuts, then secure them. 5. Connecting wire between indoor unit and outdoor unit should be UL listed or CSA approved 4 x AWG16 wire.
CS-E18EKU CU-E18EKU / CS-E21EKU CU-E21EKU 10 Operation And Control 10.1. 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.
CS-E18EKU CU-E18EKU / CS-E21EKU CU-E21EKU 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.
CS-E18EKU CU-E18EKU / CS-E21EKU CU-E21EKU b. Quiet operation stop condition 1. When one of the following conditions is satisfied, quiet operation stops: a. Powerful button is pressed. b. Stop by OFF/ON switch. c. Timer “off” activates. d. Quiet button is pressed again.
CS-E18EKU CU-E18EKU / CS-E21EKU CU-E21EKU a. Powerful button is pressed. b. Stop by OFF/ON switch. c. Timer “off” activates. d. Quiet button is pressed again. 2. When quiet operation is stopped, operation is shifted to normal operation with previous setting.
CS-E18EKU CU-E18EKU / CS-E21EKU CU-E21EKU 10.1.5. ON Timer Control 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.
CS-E18EKU CU-E18EKU / CS-E21EKU CU-E21EKU 10.2. Protection Control 10.2.1. Time Delay Safety Control • Compressor will not start for three minutes after stop of the operation. 10.2.2. 30 Seconds Forced Operation • Once compressor starts the operation, it will not stop its operation for 30 seconds. However, it can be stopped with the remote controller or the Auto button on the indoor unit.
CS-E18EKU CU-E18EKU / CS-E21EKU CU-E21EKU 10.2.7. Compressor Protection Control (Refrigeration Cycle Abnormality) In cooling and Dry operations 1. When compressor is operated continuously for 5 minutes in the maximum cooling power: a running current of 0.7 - 1.4A and “[Indoor intake air temperature] - [Indoor heat exchanger temperature]” < 7.2°F, compressor will be stopped.
CS-E18EKU CU-E18EKU / CS-E21EKU CU-E21EKU 11 Servicing Mode 11.1. 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 and release before 5 sec..