Page 2 - • Capillary tubes have been added to parts list.; Part number
Revision: • Parts No. has been changed due to the color change of outdoor unit parts. WHITE ➔ NEW WHITE (Brighter) • Capillary tubes have been added to parts list. CAPILLARY TUBE (TAPER PIPE) [ 0.17X [ 0.12X11-13/16 CAPILLARY TUBE (TAPER PIPE) [ 0.17X [ 0.12X1-31/32 E02 785 936 E02 529 936 Part numb...
Page 3 - Model; FEATURES
3 LCD wirelessremote controller “I FEEL CONTROL” IN OUR LCD WIRELESS REMOTE CONTROLLER WITH ON/OFF PROGRAM TIMER Mitsubishi Electric’s new wireless remote controller incorporates a number of advanced features that provide even greater con-trol and ease-to-use. It has a liquid crystal display which i...
Page 4 - PART NAMES AND FUNCTIONS; INDOOR UNIT; Grille; OUTDOOR UNIT
4 PART NAMES AND FUNCTIONS 2 INDOOR UNIT MSH24WN Installation plateInstallation plate fixing screw 4 x 25 mm(0.16 x 0.98 in.)Remote controller holderFixing screw for 3 3.5 x 16 mm(0.14 x 0.63 in.) (Black) Battery (AAA) for remote controllerWireless remote controller Felt tape (Used for left or left-...
Page 5 - REMOTE CONTROLLER
5 REMOTE CONTROLLER MSH24WN ON/OFF TOO COOL P M A M TOO WARM ON/OFF FAN TOO WARM TOO COOL VANE MODE STOP START HR. MIN. WIDE VANE LONG I FEEL COOL HEAT DRY P M C L O C K A M RESET CLOCK Open the front lid. Signal transmitting section Operation display section OPERATE /STOP (ON /OFF)button TEMPERATUR...
Page 6 - SPECIFICATION; Operating Range
6 SPECIFICATION 3 NOTE : Test conditions are based on ARI 210/240. ❈ 1 : Rating conditions (cooling) — Indoor : 80˚FDB, 67˚FWB, Outdoor : 95˚FDB, (75˚FWB) (heating) — Indoor : 70˚FDB, 60˚FWB, Outdoor : 47˚FDB, 43˚FWB ❈ 2 : (heating) — Indoor : 70˚FDB, 60˚FWB, Outdoor : 17˚FDB, 15˚FWB ❈ 3 : (cooling)...
Page 8 - DATA; ) COOLING CAPACITY CORRECTIONS
8 DATA 4 Model Refrigerant piping length (one way) 1.0 25ft. (std.) 0.954 40ft. 0.923 50ft. MSH24WN 2) COOLING CAPACITY CORRECTIONS 3) HEATING CAPACITY (208V/ 230V) Model Indoor air Outdoor intake air WB temperature(˚F) 75 70 65 TC 13.7 14.5 14.9 TPC 1.66 1.61 1.54 TC 17.1 17.7 18.5 TPC 1.95 1.91 1....
Page 11 - Total; POWER SUPPLY; Control voltage
4-4. STANDARD OPERATION DATA 11 Capacity SHF Input Indoor unit Power supply Input Fan motor current Aux. heater current Outdoor unit Power supply Input Comp. current Fan motor current Condensing pressure Suction pressure Discharge temperature Condensing temperature Suction temperature Comp. shell bo...
Page 13 - OUTLINES AND DIMENSIONS
13 OUTLINES AND DIMENSIONS 5 MSH24WN INDOOR UNIT Unit: inch 6-3/8 3/4 2-5/16 1-7/8 5/16 12-3/8 10-1/16 1-7/8 1/8 3-7/8 3-7/8 6-13/16 6-13/16 16-5/16 16-5/16 3/16 8-7/8 8-15/16 9-15/16 31-1/8 2-3/16 42-1/16 43-5/16 12-13/16 Air out Air in Insulation [ 1-1/8 Drain hose [ 5/8 (Connected part O.D) { Liq...
Page 15 - WIRING DIAGRAM; MODEL WIRING DIAGRAM
15 WIRING DIAGRAM 6 MSH24WN MUH24WN MODEL WIRING DIAGRAM MODEL WIRING DIAGRAM INDOOR UNIT OUTDOOR UNIT TAB12 POWER FROM OUTDOOR UNIT CONNECTING WIRES TO OUTDOOR UNIT CONNECTING WIRE SUPPLY115V1 phase60Hz CN201 RT13 121 CN CN211 CN112 TO OUTDOOR UNIT CONNECTING WIRES 12V DC 3 F11 VLT 1- 3+ 15 3 REMOT...
Page 16 - REFRIGERANT SYSTEM DIAGRAM
16 REFRIGERANT SYSTEM DIAGRAM 7 MSH24WN MUH24WN INDOOR UNIT OUTDOOR UNIT Indoor heat exchanger Outdoor heat exchanger Flared connection Room temperaturethermistorRT11 Indoor coil thermistorRT13(sub) DefrostthermistorRT61 DischargethermistorRT62 Flared connection Stop valve Stop valve(with service po...
Page 17 - MICROPROCESSOR CONTROL; lighted; Operation Indicator lamp; INDOOR UNIT DISPLAY SECTION; Example
17 MICROPROCESSOR CONTROL 8 lighted not lighted Approx. 4 - F or more Difference between target temperature and room temperature Approx. 4 - F or less This shows that the air conditioner is operating to reach the target temperature.Please wait unit the target temperature is obtained. This shows that...
Page 18 - Fuzzy control; Indoor fan speed control
18 Model COOL mode of "I FEEL CONTROL" DRY mode of "I FEEL CONTROL" HEAT mode of "I FEEL CONTROL" Initial room temperature Initial set temperature 79 - F 79 - F or more 77 - F to 79 - F less than 73 - F 73 - F to 77 - F 75 - F Initial room temperature minus 4 - F Initial room...
Page 20 - Initial temperature difference; exchanger is not detected by the defrost thermistor RT61.; Discharge temperature protection; • Compressor; High pressure protection
20 (4) Flow soft control After the thermostat turns off, the indoor fan operates at Very Low.NOTE : When the thermostat turns on, the fan operates at the set speed. Due to the cold air prevention control, the fan does not start at set speed until the indoor coil thermistor RT12 reads 72°F or more. &...
Page 25 - Horizontal AIR FLOW blowing range; ” or “
25 (3) Positioning The vane is once pressed to the vane stopper to confirm the standard position and then set to the desired angle.Confirming of standard position is performed under following conditions.(a) When the OPERATE/STOP(ON/OFF) button is pressed (POWER ON/OFF).(b) When the SWING is started ...
Page 26 - OPERATION INDICATOR lamp; EMERGENCY OPERATION switch; PROGRAM TIMER; ” and “
26 Press once <Cool> Press again <Heat> Press once again <Stop> OPERATION INDICATOR lamp • The following indication applies regardless of shape of the indicator. EMERGENCY OPERATION switch 8-8. EMERGENCY-TEST OPERATION In case of test run operation or emergency operation, use the E...
Page 28 - LEV opening
28 2 When the temperature difference RT between indoor coil thermistor (main) RT12 and indoor coil thermistor (sub) RT13 in the indoor unit is 4deg. or more for a fixed time at cool or dry operation, the target discharge temperature is changed. After the temperature is changed, when temperature diff...
Page 29 - SERVICE FUNCTIONS; -1. COMPULSORY DEFROSTING MODE FOR SERVICE; shortened by short circuit of JPG and JPS.); How to modify the remote controller P.C. board
29 SERVICE FUNCTIONS 9 9-1. COMPULSORY DEFROSTING MODE FOR SERVICE By short circuit of the connector JPG1 and R871 on the outdoor deicer P.C. board, defrosting mode can be accomplishedregardless of the defrost interval restriction.Defrost thermistor RT61 must read below 27°F. (Refer to page 42.) MSH...
Page 30 - Operation
30 9-5. AUTO RESTART FUNCTION When the indoor unit is controlled with the remote controller, the operation mode, the set temperature, and the fanspeed are memorized by the indoor electronic control P.C. board.When the main power is turned off and then turned back on, the unit restarts automatically ...
Page 31 - TROUBLESHOOTING; Troubleshooting procedure; components for bursting and discoloration.; How to replace batteries; Weak batteries may cause the remote controller malfunction.; Lead wiring; Remove the front lid and insert batteries.; RESET button; Press the RESET button.
TROUBLESHOOTING 10 31 3. Troubleshooting procedure 1) First, check if the OPERATION INDICATOR lamp on the indoor unit is flashing on and off to indicate an abnormality. To make sure, check how many times the abnormality indication is flashing on and off before starting service work. 2) Before servic...
Page 34 - Trouble criterion of main parts; Motor part
34 2. Trouble criterion of main parts MSH24WN MUH24WN Part name Figure Check method and criterion Measure the resistance between the terminals with a tester.(Part temperature 14˚F ~ 104˚F) Compressor(MC) INNER PROTECTOR320 i 9 - F OPEN 198 i 20 - F CLOSE Indoor fan motor(MF) INNER PROTECTOR275 i 9 -...
Page 36 - Check of indoor electronic control P.C. board
36 Check of indoor electronic control P.C. board C Check the both “parts side” and “pattern side” of indoor electronic control P.C. board visually. Replace the fuse. Is fuse(F11) blown? Be sure to check both fuse and varistor in any case. Replace the fan motor. Replace the indoor electronic control ...
Page 37 - Check of outdoor unit; Compressor and/ or outdoor fan motor doesn’t operate.
37 Check of outdoor unit D Compressor and/ or outdoor fan motor doesn’t operate. Is there 208/230V AC to between L1 - L2 on the outdoor terminal block ? No Check the outdoor power supply and connection of wiring. Yes Compressor does not operate. Yes 3minutes after the power supply turns ON, is there...
Page 38 - Compressor and / or outdoor fan motor doesn’t stop.
38 Check of outdoor unit E Compressor and / or outdoor fan motor doesn’t stop. Check of R.V. coil F After 30 seconds, does compressor stop? No Yes Is there 208/230V AC between A1-A2 on the compressor contactor? Replace the deicer P.C. board. Yes 1 Turn OFF the power supply. 2 After 30 seconds, turn ...
Page 39 - How to check mis-wiring; Yes
39 How to check mis-wiring G Turn OFF the power supply. Turn ON the power supply. Turn ON the EMERGENCY OPERATION switch. (any mode possible) Make sure the unit emits a beep tone. Replace the deicer P.C.board. ❈ Press the OPERATE/STOP(ON/OFF) button onthe remote controller to send signal. Turn OFF t...
Page 40 - Check of outdoor thermistor
40 Check of outdoor thermistor When OPERATION INDICATOR lamp flashes 6-time. Thermistors in the outdoor unit are abnormal. I Check of LEV (Expansion valve) H Replace the LEV coil. With remote controller set toward the indoor unit, press the OPERATE/ STOP(ON/ OFF) button and confirm one beep tone. LE...
Page 42 - DC
42 MUH24WN Outdoor deicer P.C. board Fuse 3.15A / 250V Defrostintervaltime shortpin(JPG1,R871)(Refer topage 29.) } 12V DC Jumper wire forchange in defrostsetting (JRF, JRG)(Refer to page 29.) } 5V DC + + CN661 1 - 2 Defrost thermistor (RT61) (Refer to page 40.) Temperature( - F) Discharge temperatur...
Page 43 - • COIL FROST PREVENTION; COMPRESSOR CONTACTOR; • EACH MODE
43 RELAY OPERATIONMSH24WN MODE THERMOSTAT 52C CONTACTOR INDOOR FAN SPEED COOL &COOL modeof I FEELCONTROL DRY &DRY modeof I FEELCONTROL HEAT &HEAT modeof I FEELCONTROL ON OFF OFF OFF ON ON ON OFF ON OFF OFF for 2 min. afterunit starts operation. Repeat of 8 min. ON/3min.OFF operation or 2...
Page 44 - DISASSEMBLY INSTRUCTIONS; OPERATING PROCEDURE; Removing the front panel; Photo 1; NOTE : In case of removing only indoor electronic control
DISASSEMBLY INSTRUCTIONS 11 44 11-1. MSH24WN INDOOR UNIT (1) Slide the sleeve and check if there is a locking lever or not. (2) The terminal with this connector is a terminal with lock mechanism 1 Slide the sleeve. 2 Pull the terminal while pushing the locking lever. 1 Hold the sleeve, and pull out ...
Page 46 - Removing the cabinet
46 11-2. MUH24WN OUTDOOR UNIT OPERATING PROCEDURE PHOTOS Photo 1 Photo 2 Photo 4 Propellernut Screws ofthe valvebed Screws of the separator support plate Screws of the motor support Propeller Screws of the cabinet Cover panel Screws of the top panel Photo 3 Terminal blocks Compressorcontactor 1. Rem...
Page 47 - Photo 5; Removing the heat exchanger and compressor
47 OPERATING PROCEDURE PHOTOS Photo 5 Photo 6 Photo 7 Stop valve Heat exchanger Accumulator Screws of the rear guard 4. Removing the heat exchanger and compressor (1) Remove the screws of the rear panel. Remove the screws of the valve bed and the valve bed. (The valve bed is fixedby the catches on t...
Page 48 - PARTS LIST; Symbol; Part number that is circled is not shown in the illustration.
PARTS LIST 12 48 MSH24WN (W)12-1. INDOOR UNIT STRUCTURAL PARTS MSH24WN E02 527 970E02 527 234E02 527 000E02 408 142E02 527 067E02 527 010E02 527 100E02 527 975E02 530 007 INSTALLATION PLATEBOX (W)FRONT PANEL ASSEMBLY(W)CATCHSCREW CAP (W)GRILLE (W)AIR FILTERCORNER BOX RIGHT LAMP PANEL Symbol in Wirin...
Page 49 - Part numbers that are circled are not shown in the illustration.
49 MSH24WN E02 527 302E02 408 509E02 001 504E02 408 702E02 527 235E02 527 040E02 527 041E02 784 382E02 784 385E02 527 034E02 784 300E02 448 303E02 408 303E02 527 333E02 528 329E02 527 468E02 785 452E02 527 308E02 545 375E02 527 307E02 528 034E02 529 034 123456789 10 11 1213141516171819202122 LINE FL...
Page 50 - AND FUNCTIONAL PARTS
MUH24WN12-5. OUTDOOR UNIT STRUCTURAL PARTS, ELECTRICAL PARTS AND FUNCTIONAL PARTS 1 3 5 32 2 30 28 10 16 7 27 6 33 8 4 2 11 24 12 18 19 26 31 9 25 14 13 23 22 B A 9 21 20 50 17 15 29 OB310--2.qxp 04.1.13 9:50 AM Page 50
Page 52 - OPTIONAL PARTS; DO NOT reuse AIR CLEANING FILTER even if it is washed.; Additional
OPTIONAL PARTS 13 New publication, effective Jan. 2004Specifications subject to change without notice. C C Copyright 2004 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD Distributed in Jan. 2004. No.OB310 REVISED EDITION-A 6Distributed in Mar. 2003. No.OB310 17 13-2. AIR CLEANING FILTER ● AIR CLEANING FILTE...
Page 53 - 400 Lawrenceville Suwanee Road; Specifications are subject to change without notice.
3400 Lawrenceville Suwanee Road ● Suwanee, Georgia 30024 Toll Free: 800-433-4822 ● Toll Free Fax: 800-889-9904 www.mrslim.com Specifications are subject to change without notice.
