Mitsubishi MUH24WN- Manuals

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...

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)...

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....

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...

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...

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...

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...

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...

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...

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. &...

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 ...

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...

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...

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...

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 ...

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...

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 -...

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 ...

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...

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 ...

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...

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...

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...

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...

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 ...

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...

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...

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...

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...

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

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...

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.