TECHNICAL CHANGES INFORMATION FOR THE AIR CONDITIONER WITH R-407C REFRIGERANT This room air conditioner adopts HFC refrigerant (R407C) which will never destroy the ozone layer. Pay attention to following points. 1 Take sufficient care not to allow water and other contaminations to enter the R407C refrigerant during storage and installation, since it is more susceptible to contaminations than HCFC (R22) refrigerant.
1.Tools dedicated for the air conditioner with R407C refrigerant The following tools are required for R407C refrigerant. Some R22 tools can be substituted for R407C tools. Do not use tools that are used with R22 refrigerant in order to avoid mixing oils. Description R407C tools Can R22 tools be used?
PART NAMES AND FUNCTIONS INDOOR UNIT MS-C18TV - MS-C24TV - Grille Air cleaning filter(option) Deodorizing filter(option) Remote control Front panel receiving section (When the grille is open) OUTDOOR UNIT ACCESSORIES MU-C18TV - MS-C18TV - MU-C24TV - MS-C24TV - Installation plate Installation plate fixing screw 4 x 25 mm Remote controller mounting hardware Fixing screw for 3 3.5 x 16 mm (Black)
REMOTE CONTROLLER MS-C18TV - MS-C24TV - Signal transmitting section Operation display section OPERATE /STOP (ON /OFF)button ON/OFF WARM COOL TEMPERATURE buttons Open the front lid. CLOCK ON/OFF WARM COOL FAN SPEED CONTROL button STOP I FEEL COOL OFF-TIMER button VANE START ON-TIMER button MODE...
SPECIFICATION Indoor model MS-C18TV - MS-C24TV - Function Cooling Cooling Single phase Single phase Power supply 230V, 50Hz 230V, 50Hz Capacity Dehumidification Air flow(High) K /h Power outlet Running current 12.7 Power input 2,100 2,840 — Auxiliary heater A(kW) — Power factor Starting current Fan motor current...
NOISE CRITERIA CURVES MS-C18TV - MU-C18TV - NOTCH SPL(dB(A)) LINE SPL(dB(A)) LINE NOTCH High High Test conditions, Test conditions, Cooling : Dry-bulb temperature 27: Wet-bulb temperature 19: Cooling : Dry-bulb temperature 35: Wet-bulb temperature 24: NC-70 NC-70 NC-60 NC-60 NC-50 NC-50 NC-40 NC-40...
OUTLINES AND DIMENSIONS Unit : mm MS-C18TV - 4holes 11 20 Indoor unit MS-C24TV - INDOOR UNIT Wall hole [75 Installation plate 1015 Installation plate Liquid line [8-0.5m Gas line [12-0.43m Air in Insulation [50 O.D [28 I.D Drain hose [16 Air out Insulation [28 Power supply cord...
PERFORMANCE CURVES MS-C18TV - MU-C18TV - MS-C24TV - MU-C24TV - The standard data contained in these specifications apply only to the operation of the air conditioner under normal conditions. Since operating conditions vary according to the areas where these units are installed. The following information has been provided to clarify the operating characteristics of the air conditioner under the conditions indicated by the performance curve.
14.9 12.2 13.5 11.2 12.2 10.1 11.0 OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT COOL operation 1 1 Both indoor and outdoor unit are under the same temperature/humidity condition. Dry-bulb temperature Relative humidity(%) 2 2 Air flow should be set at MAX. 3 3 The unit of pressure has been changed to MPa on the international system of units(SI unit system).
MICROPROCESSOR CONTROL MS-C18TV - WIRELESS REMOTE CONTROLLER MS-C24TV - Once the operation mode are set, the same operation mode Signal transmitting section can be repeated by simply turning the OPERATE/STOP(ON/OFF) button ON. Indoor unit receives the signal with a beep tone. When the system turns off, 3-minute time delay will operate to Operation display section protect system from overload and compressor will not restart...
(4) The initial set temperature is decided by the initial room temperature. Mode Initial room temperature Initial set temperature 26: or more COOL mode of "I FEEL CONTROL" Initial room temperature 25: to 26: minus 2: Initial room temperature DRY mode of more than13:, less than 25: "I FEEL CONTROL"...
Operation chart Example Compressor Outdoor fan (continuously at set speed) Indoor fan —DRY mode of “I FEEL CONTROL”— The system for dry operation uses the same refrigerant circuit as the cooling circuit. The compressor and the indoor fan are controlled by the room temperature. By such controls, indoor flow amounts will be reduced in order to lower humidity without much room temperature decrease.
9-2. COOL ( ) OPERATION (1) Press OPERATE/STOP(ON/OFF) button. OPERATION INDICATOR lamp of the indoor unit turns on with a beep tone. (2) Select COOL mode with the OPERATION SELECT button. (3) Press the TEMPERATURE buttons. (TOO WARM or TOO COOL button) to select the desired temperature.
(3) Positioning The vane is once pressed to the vane stopper below to confirm the standard position and then set to the desired angle. Confirming of standard position is performed in case of follows. (a) When the OPERATE/STOP(ON/OFF) button is pressed(POWER ON/OFF). (b) When the vane control is changed from AUTO to MANUAL.
9-7. TIMER OPERATION 1. How to set the timer (1) Press OPERATE/STOP(ON/OFF) button to start the air conditioner. (2) Check that the current time is set correctly. NOTE : Timer operation will not work without setting the current time. Initially “AM0:00” blinks at the current time display of TIMER MONITOR, so set the current time correctly with CLOCK SET button.
9-8. EMERGENCY-TEST OPERATION In case of test run operation or emergency operation, use the EMERGENCY OPERATION switch on the front of the indoor unit. Emergency operation is available when the remote controller is missing, has failed or the batteries of remote controller run down.
SERVICE FUNCTIONS MS-C18TV - MS-C24TV - 10-1. TIMER SHORT MODE For service, set time can be shortened by short circuit of JPG and JPS the electronic control P.C. board. The time will be shortened as follows. (Refer to page 36.) Set time : 1 minute 1-second Set time : 3 minute...
10-3. AUTO RESTART FUNCTION When the indoor unit is controlled with the remote controller, the operation mode, set temperature, and the fan speed are memorized by the indoor electronic control P.C.board. The “AUTO RESTART FUNCTION” sets to work the moment power has restored after power failure.
TROUBLESHOOTING MS-C18TV - MU-C18TV - MS-C24TV - MU-C24TV - 11-1. Cautions on troubleshooting 1. Before troubleshooting, check the following: 1) Check the power supply voltage. 2) Check the indoor/outdoor connecting wire for mis-wiring. 2. Take care the following during servicing. 1) Before servicing the air conditioner, be sure to first turn off the remote controller to stop the unit, and then after confirming the horizontal vane is closed, turn off the breaker and / or disconnect the power plug.
11-2. Instruction of troubleshooting Start MS-C24TV only Indoor unit Indoor unit Indoor unit OPERATION INDICATOR operates. doesn't receive operates. lamp on the indoor unit is Outdoor unit the signal from Outdoor unit flashing on and off. doesn't doesn't operate remote controller. operate.
MS-C18TV - MU-C18TV - MS-C24TV - MU-C24TV - 2. Trouble criterion of main parts Part name Check method and criterion Figure Room Measure the resistance with a tester. temperature (Part temperature 10°C ~ 30°C) thermistor(RT11) Normal Abnormal Indoor coil Open or short-circuit 8kΩ...
Check of indoor fan motor Indoor fan motor doesn’t operate. Turn OFF the power supply. Check connector CN211 visually. Is soldering point of the connector Are lead wires connected? Resolder it. correctly soldered? Reconnect the lead wires. Disconnect lead wires from connector CN211 on the indoor electronic control P.C. board. Measure resistance between lead wires No.1 and No.4 and then No.1 and No.2.
Check of indoor electronic control P.C. board The unit doesn’t operate with the remote controller. Also, the OPERATION INDICATOR lamp doesn’t light up by pressing the EMERGENCY OPERATION switch. Check the both “parts side”and “pattern side” of indoor electronic control P.C. board visually. Turn OFF the power supply.
MS-C24TV Turn ON the power supply. Pess the EMERGENCY OPERATION switch. 3-minute time delay works. Test run operation operates for 30 minutes. Make the connection Is there 230V AC between 2-N on the of wiring correct. outdoor terminal block ? Compressor doesn't operate.
Check of outdoor unit <MS-C24TV only> Compressor and / or outdoor fan motor doesn’t stop. 1 Turn OFF the power supply. 2 After 30 seconds, turn ON the power supply again. 3 Operate the unit in COOL mode by pressing the EMERGENCY OPERATION switch.
TEST POINT DIAGRAM AND VOLTAGE MS-C18TV - MS-C24TV - Indoor electronic control P.C. board Varistor(NR11) Fan motor power supply Fuse 250V AC 3.15A Power supply input 230V AC C144 5V DC C144 Room temperature thermistor(RT11) Indoor coil thermistor(RT12) Timer short mode point(JPG, JPS) (Refer to page 27.) Emergency operation switch...
DISASSEMBLY INSTRUCTIONS <"Terminal with lock mechanism" Detaching points> In case of terminal with lock mechanism, detach the terminal as shown below. There are two types ( Refer to (1) and (2)) of the terminal with lock mechanism. The terminal with no lock mechanism can be removed by pulling it out. Check the shape of the terminal and work.
OPERATING PROCEDURE PHOTOS 3. Removing the electrical box Photo 3 (1) Remove the front panel. (Refer to 1) (2) Remove the electrical cover. (3) Disconnect the connector of the indoor coil thermistor. (4) Disconnect the motor connector (CN211 and CN121) and the vane motor connector (CN151) on the electronic con- trol P.C.
12-2. MU-C18TV - OUTDOOR UNIT OPERATING PROCEDURE PHOTOS 1. Removing the cabinet Photo 1 (1) Remove the screws of the cabinet. (2) Hold the bottom of the cabinet on the both side to remove the cabinet. Screws of the cabinet Service panel Photo 2...
OPERATING PROCEDURE PHOTOS Hook 3. Removing the outdoor fan motor Photo 4 Connector (1) Remove the cabinet. (Refer to 1) (2) Disconnect the connector remove the hooked lead wire from the fan motor. (3) Remove the propeller fan nut and remove the propeller fan. (4) Remove screws fixing the fan motor.
12-3. MU-C24TV - OUTDOOR UNIT OPERATING PROCEDURE PHOTOS 1. Removing the cabinet Photo 1 (1) Remove the screws of the cabinet. (2) Hold the bottom of the cabinet on the both side to remove the cabinet. Screws of the cabinet Service panel Photo 2...
OPERATING PROCEDURE PHOTOS 3. Removing the outdoor fan motor Photo 4 Lead clamp Hook (1) Remove the cabinet. (Refer to 1) Connector (2) Disconnect the connector and remove the lead wire from the fan motor. (3) Remove the propeller fan nut and remove the propeller fan. (4) Remove the screws fixing the fan motor.
PARTS LIST MS-C18TV - (WH) MS-C24TV - (WH) 13-2. INDOOR UNIT 13-1. INDOOR UNIT HEAT EXCHANGER STRUCTURAL PARTS Optional parts (See page 46.) SCREW CAP 13-1. INDOOR UNIT STRUCTURAL PARTS Part number that is circled is not shown in the illustration. Symbol Q'ty/unit in Wiring...
MS-C18TV - (WH) 13-4. ACCESSORY PART MS-C24TV - (WH) AND REMOTE CONTROLLER 13-3. INDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS SLEEVE BEARING INDOOR COIL ROOM TEMPERATURE THERMISTOR THERMISTOR 13-3. INDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS Symbol Q'ty/unit in Wiring Part No.
MU-C18TV - MU-C24TV - 13-5. OUTDOOR UNIT STRUCTURAL PARTS, ELECTRICAL PARTS AND FUNCTIONAL PARTS Part numbers that are circled are not shown in the illustration. Symbol Q'ty/unit in Wiring Part No. Part Name Remarks MU-C18TV - MU-C24TV - Diagram E02 140 233 BACK PANEL E02 141 232 CABINET...
OPTIONAL PARTS 14-1. AIR CLEANING FILTER AIR CLEANING FILTER removes fine dust of 0.01 micron from air by means of static electricity. Normal life of AIR CLEANING FILTER is 4 months. However, when it becomes dirty, replace it as soon as possible. Clogged AIR CLEANING FILTER may reduce the air conditioner capacity or cause frost on the air outlet.
HEAD OFFICE: MITSUBISHI DENKI BLDG., 2-2-3, MARUNOUCHI, CHIYODA-KU, TOKYO100-8310, JAPAN C C Copyright 2000 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD. New publication, effective Dec. 2000 Issued in Dec. 2000. No.OB273 223 Specifications subject to change without notice. Made in Japan...