Revision A: • Another type of the electronic control P.C. board (TYPE 2) has been added to the original one (TYPE 1). They are both compatible with MS/MSH-GE50VB- E1 . SPLIT-TYPE AIR CONDITIONERS Please void OBH529. INDOOR UNIT No.
Use the specified refrigerant only Never use any refrigerant other than that specified. Doing so may cause a burst, an explosion, or fire when the unit is being used, serviced, or disposed of. Correct refrigerant is specified in the manuals and on the spec labels provided with our products. We will not be held responsible for mechanical failure, system malfunction, unit breakdown or accidents caused by failure to follow the instructions. Revision A: • Another type of the electronic control P.C.
MS-GE50VB MSH-GE50VB Air cleaning filter (option) (White bellows type) Front panel Air inlet To breaker Panel Power supply cord Catechin air filter Remote control receiving section Vertical vanes Horizontal vane Remote controller Operation section Display section (When the grille is opened) Operation indicator lamp Emergency operation switch Remote control receiving section ACCESSORIES Installation plate Installation plate fixing screw 4 25 mm Remote controller holder Fixing screw for 3.5 1.
SPECIFICATION 3 MSC-GE20VB Indoor model Function Power supply Special remarks Fan Electrical motor data Breaker capacity Running current Power input Power factor Model Fan motor current Dimensions W H D Weight Air direction Air flow (High/Med./Low) Sound level (High/Med./Low) Fan speed (High/Med./Low) Fan speed regulator Remote controller model A A W % A mm kg m3/h dB rpm Heating Cooling Single phase 230 V, 50 Hz 10 0.17 35 90 RC4V19-JA 0.
NOISE CRITERIA CURVES 4 MSC-GE20VB COOLING High 90 MSC-GE25VB LINE High Test conditions, Cooling : Dry-bulb temperature 27 Heating : Dry-bulb temperature 20 Wet-bulb temperature19 Wet-bulb temperature - 90 OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR 80 70 NC-70 60 NC-60 50 NC-50 40 NC-40 30 NC-30 20 SPL(dB(A)) FAN SPEED FUNCTION 36 HEATING Test conditions, Cooling : Dry-bulb temperature 27 Heating : Dry-bulb temperature 20 OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.
MS-GE50VB FAN SPEED FUNCTION High SPL(dB(A)) COOLING MSH-GE50VB LINE Test conditions, Cooling : Dry-bulb temperature 27 Heating : Dry-bulb temperature 20 OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR 80 70 NC-70 60 NC-60 50 NC-50 40 NC-40 30 NC-30 20 NC-20 NC-10 63 125 250 500 1000 2000 4000 8000 INDOOR UNIT WALL 1m 0.
OUTLINES AND DIMENSIONS 133.5 Installation plate Indoor unit Unit: mm 4.5 81.5 271 MSC-GE20VB MSC-GE25VB 231.5 5 81.5 326 42 41 2.5 783 81.5 326 Wall hole Air in 242 5 Installation plate { 278 7 or more 815 58 90 30 149 606 60 19 110 Air out 162 Power supply cord Lead to right 1.0m Lead to left 0.3m 65 244 Liquid line 6.35-0.5m Gas line 9.52-0.43m Insulation 37 O.D 21 I.
Installation plate Unit: mm Indoor unit 98 7.5 173 98 414.5 414.5 Wall hole 258 1100 Air in 173 Installation plate 325 791 253 Air out 19 162 58 Power supply cord Lead to right 2.0 m Lead to left 1.0 m Wireless remote controller OBH529A 8 47 75 5 { 56 2.5 47 255.5 1068 315 MS-GE50VB MSH-GE50VB Liquid line 6.35- 0.5 m Gas line 12-0.43 m Insulation 50 O.D 32 I.D Drain hose 16 (Connected part O.
6 WIRING DIAGRAM MSC-GE20VB MSC-GE25VB MSC-GE35VB MS-GE50VB MSH-GE50VB OBH529A 9
7 REFRIGERANT SYSTEM DIAGRAM MSC-GE20VB MSC-GE25VB MSC-GE35VB Refrigerant pipe 9.52 (with heat insulator) Indoor heat exchanger Indoor coil thermistor RT12 Unit:mm Flared connection Room temperature thermistor RT11 Flared connection Refrigerant pipe 6.35 (with heat insulator) MS-GE50VB MSH-GE50VB Refrigerant pipe 12.7 (with heat insulator) Indoor heat exchanger Indoor coil thermistor RT12 Distributor Flared connection Room temperature thermistor RT11 Flared connection Refrigerant pipe 6.
SERVICE FUNCTIONS 8 MSC-GE20VB MSC-GE25VB MSC-GE35VB MS-GE50VB MSH-GE50VB 8-1. TIMER SHORT MODE For service, set time can be shortened by short circuit of JPG and JPS on the electronic control P.C. board. (Refer to 10-6.) The time will be shortened as follows. 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.) 8-2. P.C.
8-4. MU & MUX TYPE/MUH & MXZ TYPE SWITCH OVER AND AUTO RESTART FUNCTION 1. MU & MUX TYPE/MUH & MXZ TYPE SWITCH OVER The indoor units for MU & MUX type and MUH & MXZ type are common specifications. Set switch according to the type of outdoor unit. The units are set for MUH & MXZ type when they are shipped from the factory. SW2SW2- sets the AUTO RESTART FUNCTION ON/OFF. switches over the MU & MUX type/MUH & MXZ type.
MS-GE50VB MSH-GE50VB (1) Turn OFF the main power for the unit. (2) Solder jumper wire to JR07 on the indoor electronic control P.C. board. (Refer to 10-6.) NOTE: •The operation settings are memorized when 10 seconds have passed after the indoor unit was operated with the remote controller. •If main power is turned OFF or a power failure occurs while AUTO START/STOP timer is active, the timer setting is cancelled.
9 MICROPROCESSOR CONTROL WIRELESS REMOTE CONTROLLER MSC-GE20VB MSC-GE25VB MSC-GE35VB Signal transmitting section Operation display section PM OPERATE /STOP (ON /OFF) button AM TOO WARM ON/OFF TOO COOL TEMPERATURE buttons CLOCK PM AM TOO WARM ON/OFF FAN SPEED CONTROL button TOO COOL FAN STOP I FEEL COOL HEAT /FAN VANE START DRY / HR. MODE OPERATION SELECT button ECONO COOL ECONO COOL button MIN. RESET CLOCK OFF-TIMER button ON-TIMER button HR. button MIN.
MSH-GE50VB Signal transmitting section Operation display section PM OPERATE/STOP (ON/OFF) button AM ON/OFF TOO WARM TOO COOL TEMPERATURE buttons CLOCK PM AM ON/OFF VANE button (Horizontal vane button) TOO WARM TOO COOL FAN STOP VANE START FAN SPEED CONTROL button I FEEL COOL HEAT DRY OFF-TIMER button ON-TIMER button MODE WIDE VANE HR. ECONO COOL LONG MIN. HR. button MIN.
9-1. COOL ( ) OPERATION ON with a beep tone. 1. Coil frost prevention When the temperature of indoor heat exchanger becomes too low, the coil frost prevention mode works. The indoor fan operates at the set speed and the compressor stops. This mode continues until the temperature of indoor heat exchanger rises. 9-2. DRY ( ) OPERATION The set temperature is determined from the initial room temperature.
OBH529A 17
9-6. AUTO VANE OPERATION CONTROL or VANE To confirm the standard position, the vane moves until it touches the vane stopper. Then the vane is set to the desired angle. in the following case: In FAN operation VANE CONTROL or VANE VANE CONTROL or VANE The horizontal vane position is set to Upward.
When ECONO COOL button is pressed in COOL mode, set temperature is automatically set 2 C higher. Also the horizontal vane swings in various cycles. SWING operation makes you feel cooler than set temperature. So, even though the set temperature is higher, the air conditioner can keep comfort. As a result, energy can be saved. To cancel this operation, select a different mode or press one of the following buttons in ECONO COOL operation: ECONO COOL, VANE CONTROL, VANE or LONG button.
9-7.
9-8. EMERGENCY/TEST OPERATION The indoor fan runs at High speed and the temperature control does not work. /(HEAT MODE ) with a set temperature of 24 °C. (and defrosting also ). the test run or the (or twice ) or the unit receives any signal from the remote controller. In case of latter, normal operation will start. *Heat is a vailable only in MUH. 9-9.
10 TROUBLESHOOTING MSC-GE20VB MSC-GE25VB MSC-GE35VB MS-GE50VB MSH-GE50VB 10-1. 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.
10-2. INSTRUCTION OF TROUBLESHOOTING Start Indoor unit operates. Outdoor unit does not operate. Indoor unit does not receive the signal from remote controller. Indoor unit operates. Outdoor unit does not operate normally. OPERATION INDICATOR lamp on the indoor unit is flashing ON and OFF. Outdoor unit operates only in “Test run operation”. MUH/MUX Outdoor unit does not operate even in “Test run operation”. Outdoor unit does not stop even if indoor unit stops.
10-3. TROUBLESHOOTING CHECK TABLE • Before taking measures, make sure that the symptom reappears for accurate troubleshooting. When the indoor unit has started operation and the following detection method has detected an abnormality (the first detection after the power ON), the indoor electronic control P.C. board turns OFF the indoor fan motor with the OPERATION INDICATOR lamp flashing. · Flashing of the OPERATION INDICATOR lamp (the left-hand side lamp) Lighted indicates possible abnormalities.
10-4. TROUBLE CRITERION OF MAIN PARTS Part name MS-GE50VB MSH-GE50VB Room temperature thermistor (RT11) Check method and criterion Measure the resistance with a tester. (Part temperature 10°C ~ 30°C) Figure Indoor coil thermistor (RT12) Refer to 10-6. "Test point diagram and voltage", "Indoor electronic control P.C. board", for the chart of thermistor.
10-5. TROUBLESHOOTING FLOW When OPERATION INDICATOR lamp flashes 3-time. Indoor fan motor does not operate. A Check of indoor fan motor Turn OFF the power supply. Check connector CN211 visually. No Are lead wires connected? Yes No Is soldered point of the connector correctly soldered? Resolder it. Yes 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.5 and then No.3 and No.
The unit does not operate with the remote controller. Also, the OPERATION INDICATOR lamp does not light up by pressing the EMERGENCY OPERATION switch. C Check of indoor electronic control P.C. board Check the both “parts side” and “pattern side” of indoor electronic control P.C. board visually. Varistor (NR11) Turn OFF the power supply. Remove indoor fan motor connector CN211 and vane motor connector CN151 from the indoor electronic control P.C. board and turn ON the power supply.
When OPERATION INDICATOR lamp flashes 0.5-second intervals or 1-time. Outdoor unit does not operate. How to check mis-wiring and serial signal error MUH (Except MUH-GE50VB), MXZ 1 Set the switch(SW2- ) on indoor electronic control P.C. board to MU or MUX type, when the outdoor unit is MU or MUX type. If the setting is MUH or MXZ type, the unit does not work. Start 2 Short circuit of JPG and JPS on the indoor electronic control P.C. board enables self-check to be displayed in 3 seconds.
When OPERATION INDICATOR lamp flashes ON and OFF in every 0.5-second. Outdoor unit does not operate. E How to check mis-wiring MUH-GE50VB Short circuit of JPG and JPS on the indoor electronic control P.C. board enables self -check to be displayed in 3 seconds. Start • Turn ON the power supply. (indoor/outdoor unit) • Press EMERGENCY OPERATION switch once. After 3 minutes, mis-wiring is indicated (0.5-second ON, 0.5-second OFF) on OPERATION INDICATOR lamp on indoor unit. Yes Correct them.
10-6. TEST POINT DIAGRAM AND VOLTAGE Fuse (F11)T3.15AL 250V Power supply input 230 V AC } MSC-GE20VB MSC-GE25VB MSC-GE35VB Indoor electronic control P.C. board R132 Fan motor power supply (CN211) Safety device of fan by horizontal vane CN1R1 Room temperature thermistor RT11 Indoor coil thermistor RT12 Varistor (NR11) J12 12 V DC } { –+ J33 Timer short mode point JPG, JPS (Refer to 8-1.) Emergency operation switch –+ J23 CN121 } Power monitor, receiver P.C.
MS-GE50VB MSH-GE50VB Indoor electronic control P.C. board NOTE: There are two types of electronic control P.C. boards (TYPE 1/TYPE 2). They are both compatible with MS/MSH-GE50VB. TYPE 1 Fan motor power supply (CN211) } Power supply input 230 V AC + } 5 V DC Room temperature thermistor (RT11) Indoor coil thermistor (RT12) Fuse (F11) T3.15AL250V R132 CN121 Vane moter power supply (CN151) Emergency operation switch Timer short mode point (JPS, JPG) (Refer to 8-1.) + } Receiver P.C.
MS-GE50VB MSH-GE50VB Indoor electronic control P.C. board TYPE 2 Fan motor power supply (CN211) } Power supply input 230 V AC + Fuse (F11) T3.15AL250V } 5 VDC R132 Room temperature thermistor (RT11) Indoor coil thermistor (RT12) 12 VDC { + CN121 Vane motor power supply (CN151) To disable “Auto restart function”, solder jumper wire to JR07. (Refer to 8-4.2.) Emergency operation switch Timer short mode point (JPS, JPG) (Refer to 8-1.
11 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. Sleeve Slide the sleeve. Pull the terminal while pushing the locking lever.
OPERATING PROCEDURE PHOTOS 3. Removing the electrical box (1) (2) (3) (4) (5) (6) (7) Remove the front panel. (Refer to 1.) Remove the electrical cover. (Refer to 2.) Remove the V.A. clamp. (Refer to 2.) Remove the cord clamp. (Refer to 2.) Remove the terminal block. (Refer to 2.) Remove the screw of earth wire. (Refer to 2.) Disconnect the connector of the indoor coil thermistor (CN112), the fan motor connector (CN211 and CN121) and the vane motor connector (CN151) on the electronic control P.C. board.
11-2. MS-GE50VB MSH-GE50VB NOTE: Turn OFF power supply before disassembly. OPERATING PROCEDURE PHOTOS 1. Removing the panel (1) Remove the screw caps of the panel. Remove the screws of the panel. (2) Pull the panel down to your side slightly and unhook the catches at the top. (3) Remove the screw of the corner box. Remove the corner box. Photo 1 Screws of the panel 2. Removing the electronic control P.C. board, the receiver P.C. board and the display P.C.
OPERATING PROCEDURE 4. Removing the vane motor (1) Remove the panel and the corner box. (Refer to 1.) (2) Remove the electrical cover. (Refer to 2.) (3) Remove the lead wire of vane motor. (Refer to 3.) (4) Remove the R.L. holder. (5) Pull out the drain hose from the nozzle assembly and remove the nozzle assembly. (6) Remove the screws of the vane motor and disconnect the connector. (7) Remove the vane motor.
