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SPLIT-TYPE, AIR CONDITIONERS
INDOOR UNIT
No. TBH014
SERVICE MANUAL
Wireless type
Models
C1
MS-GD08ND-
C1
MS-GD10ND-
C1
MS-GD12ND-
Outdoor unit service manual
MU-GD•ND Series (TBH016)
CONTENTS
1. TECHNICAL CHANGES ................................... 2
2. PART NAMES AND FUNCTIONS ..................... 3
3. SPECIFICATION ................................................ 4
4. OUTLINES AND DIMENSIONS ........................ 5
5. WIRING DIAGRAM ............................................ 6
6. REFRIGE
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1 TECHNICAL CHANGES C1 C1 MS-A08ND- ➔ MS-GD08ND- C1 C1 MS-A12ND- ➔ MS-GD12ND- 1. Indoor unit has been changed. • Front panel has been changed. (Flat Flat Shining) 2. Terminal block has been changed. 3P (L~, N~, 2~) 4P (L~, N~, 2~, Earth) C1 C1 MS-A10ND- ➔ MS-GD10ND- 1. Indoor unit has been changed. • Front panel has been changed. (Flat Flat Shining) 2
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2 PART NAMES AND FUNCTIONS INDOOR UNIT C1 MS-GD08ND- C1 MS-GD10ND- C1 MS-GD12ND- Air cleaning filter (white bellows type) Front panel Air inlet Panel Catechin air filter (with deodorizing) Remote control receiving section Air outlet Vertical vanes Fan Remote controller Horizontal vane Operation section Display section (When the front panel is opened) Operation indicator lamp Emergency operation switch Remote control receiving section ACCESSORIES C1 MS-GD08ND- C1 MS-GD10ND- C1 MS-GD12ND-
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REMOTE CONTROLLER C1 MS-GD08ND- C1 MS-GD10ND- C1 MS-GD12ND- Signal transmitting section Operation display section h These buttons are able to store the light from nature, fluorescent lamp, etc and TOO TOO ON/OFF OPERATE/STOP (ON/OFF) button WARM COOL shine in the dark. TEMPERATURE buttons ECONO COOL FAN ECONO COOL button I FEEL COOL FAN SPEED CONTROL button FAN DRY POWERFUL COOL VANE VANE CONTROL button POWERFUL COOL button MODE SELECT TIME OPERATION SELECT button TIME SET button Indicatio
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4 OUTLINES AND DIMENSIONS C1 Unit : mm MS-GD08ND- 81.5 133.5 INDOOR UNIT Installation plate Indoor unit 783 81.5 81.5 326 326 Wall hole [65 242 5 Air in 815 Installation plate Liquid line [6.35-0.5m Gas line [9.52-0.43m { Insulation [37 O.D [21 I.D 90 60 606 149 Drain hose [16 110 (Connected part O.D) Insulation [28 Air out 17.5 244 57 Wireless remote controller 161.5 161.5 C1 MS-GD10ND- C1 MS-GD12ND- Installation plate INDOOR UNIT Indoor unit 783 81.5 326 326 81.5 Wall hole [65 242 5 Air in
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5 WIRING DIAGRAM C1 MS-GD08ND- C1 MS-GD12ND- INDOOR UNIT C1 MS-GD10ND- 6
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6 REFRIGERANT SYSTEM DIAGRAM C1 C1 MS-GD08ND- MS-GD12ND- C1 MS-GD10ND- INDOOR UNIT INDOOR UNIT Refrigerant pipe Refrigerant pipe (Option){12.7 (Option){9.52 (with heat insulator) (with heat insulator) Indoor Indoor Indoor coil heat heat exchanger exchanger thermistor Indoor coil Flared Flared RT12 thermistor connection connection RT12 RT11 RT11 Room Room temperature temperature Flared thermistor Flared thermistor connection connection Refrigerant pipe Refrigerant pipe (Option){6.35 (Option){6.
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7 SERVICE FUNCTIONS C1 MS-GD08ND- C1 MS-GD10ND- C1 MS-GD12ND- 7-1. 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 8-6.) Set time : 1-minute 1-second Set time : 3-minute 3-second It takes 3 minutes for the compressor to start operation. However, the starting time is shortened by short circuit of JPG and JPS. 7-2. P.C. BOARD MODIFICATION FOR INDIVIDUAL OPERA
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CN1R1 CN121 CN1 1 2 CN151 CN1V1 CN1 1 1 CN201 C1 1 CN21 1 7-3. 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. Then, the unit will restart automatically. However if the unit is operated in “I FEEL CONTROL” mode before power failure, the operation is not m
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8 TROUBLESHOOTING C1 MS-GD08ND- C1 MS-GD10ND- C1 MS-GD12ND- 8-1. 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 turn off the main unit first with the remote controller, and then after confirming the horizontal vane is closed, turn off the breaker and / or disconnect the powe
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5. How to install the horizontal vanes 5. How to install the horizontal vanes If horizontal vanes are not installed correctly, both of the operation indicator lamps will flash. If horizontal vanes are not installed correctly, both of the operation indicator lamps will flash. In this case, install the horizontal vanes correctly by following the procedures 1 to 6. In this case, install the horizontal vanes correctly by following the procedures 1 to 6. NOTE: Before installation of the horizonta
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8-2. Instruction of troubleshooting Start Indoor unit Indoor unit OPERATION INDICATOR operates. doesn't receive lamp on the indoor unit is Outdoor unit the signal from flashing on and off. doesn't remote controller. operate. Outdoor unit Indoor unit Indoor unit doesn't Outdoor unit doesn't operate, operates, when operate operates in when the the EMERGENCY even in only Test run EMERGENCY OPERATION Test run operation. OPERATION switch is pressed. operation. switch is pressed.
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8-3. Troubleshooting check table • The following indication applies regardless of shape of the indicator. flashing · Flashing of the OPERATION INDICATOR lamp (on the left) Operation Indicator indicates possible abnormalities. · The OPERATION INDICATOR lamp (on the left) is lighting during normal operation. Before taking measures, make sure that the symptom reappears for accurate troubleshooting. Self check table Abnormal No. Indication Symptom Detection method Check point point Both lamps
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8-4. Trouble criterion of main parts C1 MS-GD08ND- C1 MS-GD10ND- C1 MS-GD12ND- 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 thermistor Open or short-circuit 8k" ~ 20k " (RT12) Measure the resistance between the terminals with a tester. (Coil wiring temperature10°C ~ 30°C) Abnormal Normal Color of lead wire WHT-BLK 299~324 " Open or Indoor fan short-circuit BLK-RED
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8-5. Troubleshooting flow When left OPERATION INDICATOR lamp flashes 3-time. Indoor fan motor doesn’t operate. Turn OFF the power supply. A Check of indoor fan motor Check connector CN211 visually. No No Yes Is soldering point of the connector Are lead wires connected? correctly soldered? Yes Reconnect the lead wires. Resolder it. Disconnect lead wires from connector CN211 on the indoor electronic control P.C. board. Measure resistance between lead wires: No.1 and No.5 and then No.3 and No.5
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The unit doesn’t operate with the remote controller. Also, the OPERATION INDICATOR lamp doesn’t light up by pressing the EMERGENCY OPERATION switch. C Check of indoor electronic control P.C. board MS-GD10ND MS-GD08/GD12ND Check both “parts side” and “pattern side” of the indoor electronic control P.C. board visually. 3 1 3 1 Turn OFF the power supply. 2 L Remove indoor fan motor connector CN211 and CN201 1 CN201 N vane motor connector CN151 from the indoor electronic F12 control P.C. board a
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When both OPERATION INDICATOR lamps flash ON and OFF every 0.5-second. Indoor unit and outdoor unit don’t operate. D Check of installation of the horizontal vane Start Turn OFF the power supply. No Relock the stopper of the Is the stopper of the horizontal vane horizontal vane to the indoor unit. locked to the indoor unit correctly? Refer to 8-1-5. Yes Turn ON the power supply. No Is the OPERATION OK INDICATOR lamp flashing? Yes To check the continuity of safety device, Turn OFF the me
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} 8-6. Test point diagram and voltage C1 MS-GD08ND- C1 MS-GD10ND- C1 MS-GD12ND- Power supply input Indoor electronic control P.C. board 220 - 230V AC Fuse 250V AC 3.15A Indoor fan motor 220 - 230V AC } Varistor (NR12) Safety device of fan by horizontal vane CN1R1 Room temperature Varistor thermistor (RT11) (NR11) Indoor coil thermistor (RT12) J12 Timer short mode 12V + point JPG, JPS { DC – } (Refer to 7-1.) J33 Emergency operation switch J33 J23 Release of Auto restart function
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9 DISASSEMBLY INSTRUCTIONS <”Terminal with locking mechanism” Detaching points> The terminal which has the locking mechanism can be detached as shown below. There are two types ( Refer to (1) and (2)) of the terminal with locking mechanism. The terminal without locking mechanism can be detached by pulling it out. Check the shape of the terminal before detaching. (1) Slide the sleeve and check if there is a locking lever or not. (2) The terminal with this connector has the locking mechanism. Sl
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OPERATING PROCEDURE PHOTOS 3. Removing the electrical box Vane motor Photo 3 Indoor coil thermistor (1) Remove the panel. (Refer to 1.) connector connector (2) Remove the electrical cover. (Refer to 2.) (3) Remove the V.A. clamp. (Refer to 2.) Screw of the (4) Remove the cord clamp. (Refer to 2.) electrical box (5) Remove the terminal block. (Refer to 2.) (6) Remove the screw of ground wire. (Refer to 2.) (7) Disconnect the connector of the indoor coil thermistor (CN112), the fan motor conn
