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Questo manuale d'istruzione è fornito da trovaprezzi.it. Scopri tutte le offerte per
Condizionatore MSZ-WN25
INDOOR UNIT
SERVICE MANUAL
Models
MSZ-WN25VA
MSZ-WN35VA
MSZ-WN25VA
MSZ-WN35VA
NOTE:
RoHS compliant products have
<G> mark on the spec name plate.
o cerca il tuo prodotto tra le
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E1
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E1
CONTENTS
1. TECHNICAL CHANGES ······························3
2. PART NAMES AND FUNCTIONS ··················4
3. SPECIFICATION ········································5
4. NOISE CRITERIA CURVES ··························6
5. OUTLINES AND DIMENSIONS ·····················7
6. WIRING DIAGRAM ·····································8
7. REFRIGERANT SYSTEM DIAGRAM ·············9
8. SERVICE FUNCTIONS ······························ 10
9. MICROPROCESSOR CONTROL ················ 11
10. TROUBLESHOOTING ······························· 15
11. DISASSEMBLY INSTRUCTIONS ················· 27
PARTS CATALOG (OBB764)
migliori offerte di Climatizzazione
No. OBH764
Outdoor unit service manual
MUZ-WN·VA Series (OBH765)
Mitsubishi
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Table of Contents
Related Manuals for Mitsubishi Electric MSZ-WN25VA - E1
Summary of Contents for Mitsubishi Electric MSZ-WN25VA - E1
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Page 1: Table Of Contents
Questo manuale d’istruzione è fornito da trovaprezzi.it. Scopri tutte le offerte per Mitsubishi Condizionatore MSZ-WN25 o cerca il tuo prodotto tra le migliori offerte di Climatizzazione INDOOR UNIT No. OBH764 SERVICE MANUAL Models MSZ-WN25VA MSZ-WN35VA Outdoor unit service manual MUZ-WN·VA Series (OBH765) CONTENTS 1. - Page 2 Use the specifi ed 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.
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Page 3: Technical Changes
TECHNICAL CHANGES MSZ-WN25VA - MSZ-WN35VA - 1. New model OBH764... -
Page 4: Part Names And Functions
PART NAMES AND FUNCTIONS MSZ-WN25VA MSZ-WN35VA Front panel Air inlet Air lter (Air purifying filter) Air cleaning lter (Silver-ionized air purifier filter) Horizontal vane Air outlet Heat exchanger Display section Remote control Remote controller receiving section Operation indicator lamp Emergency operation switch ACCESSORIES Installation plate Installation plate fi... -
Page 5: Specification
SPECIFICATION Indoor model MSZ-WN25VA MSZ-WN35VA Power supply Single phase 230 V, 50 Hz Breaker Capacity Cooling 1,020 Power input 1 (Total) Heating Cooling Running current 1 (Total) Heating Cooling Power factor 1 (Total) Heating Starting current 1 (Total) Model RC0J40-EF Cooling 0.19 0.26... -
Page 6: Noise Criteria Curves
NOISE CRITERIA CURVES MSZ-WN25VA MSZ-WN35VA FAN SPEED FUNCTION SPL(dB(A)) LINE FAN SPEED FUNCTION SPL(dB(A)) LINE COOLING COOLING Super High Super High HEATING HEATING NC-70 NC-70 NC-60 NC-60 NC-50 NC-50 NC-40 NC-40 NC-30 NC-30 NC-20 NC-20 NC-10 NC-10 1000 2000 4000 8000 1000 2000... -
Page 7: Outlines And Dimensions
OUTLINES AND DIMENSIONS MSZ-WN25VA MSZ-WN35VA Unit: mm 11×26 OBLONG HOLE 11×20 OBLONG HOLE INSTALLATION PLATE 80.5 80.5 INDOOR UNIT 61.5 59.5 WALL HOLE Ø 65 AIR IN INSTALLATION PLATE PIPING DRAIN HOSE AIR OUT INSULATION Ø35 O.D LIQUID LINE Ø7.0 - 0.39m (FLARED CONNECTION Ø6.35) Ø9.52 - 0.34m (FLARED CONNECTION Ø9.52) GAS LINE DRAIN HOSE... -
Page 8: Wiring Diagram
WIRING DIAGRAM MSZ-WN25VA MSZ-WN35VA OBH764... -
Page 9: Refrigerant System Diagram
REFRIGERANT SYSTEM DIAGRAM Unit: mm MSZ-WN25VA MSZ-WN35VA Refrigerant pipe ø9.52 (with heat insulator) Indoor coil Indoor thermistor heat RT12 exchanger Flared connection Indoor coil thermistor RT13 Room temperature thermistor RT11 Flared connection Refrigerant pipe ø6.35 (with heat insulator) Refrigerant flow in cooling Refrigerant flow in heating OBH764... -
Page 10: Service Functions
SERVICE FUNCTIONS MSZ-WN25VA MSZ-WN35VA 8-1. TIMER SHORT MODE For service, the following set time can be shortened by bridging the timer short mode point on the electronic control P.C. board. (Refer to 10-7.) Set time: 3-minute → 3-second (It takes 3 minutes for the compressor to start operation. However, the starting time is shortened by bridging the timer short mode point.) NOTE: While the relay 52C is ON, the compressor starting time cannot be shortened. -
Page 11: Microprocessor Control
MICROPROCESSOR CONTROL MSZ-WN25VA MSZ-WN35VA WIRELESS REMOTE CONTROLLER Signal transmitting section FAN SPEED CONTROL button Operation display section VANE CONTROL button OPERATION SELECT button TIME, TIMER set buttons FORWARD button BACKWARD button ECONO COOL button TEMPERATURE buttons STOP/OPERATE (OFF/ON) button RESET button CLOCK SET button Indication of remote controller... - Page 12 9-2. DRY ( ) OPERATION (1) Press STOP/OPERATE/ (OFF/ON) button. OPERATION INDICATOR lamp of the indoor unit turns on with a beep tone. (2) Select DRY mode with OPERATION SELECT button. (3) The set temperature is determined from the initial room temperature. 1.
- Page 13 (5) STOP (operation OFF) and ON TIMER standby In the following cases, the horizontal vane returns to the closed position. (a) When STOP/OPERATE/ (OFF/ON) button is pressed (POWER OFF). (b) When the operation is stopped by the emergency operation. (c) When ON TIMER is ON standby. (6) Dew prevention During COOL or DRY operation with the vane angle at Angle 3 ~ 5 when the compressor cumulative operation time exceeds 1 hour, the vane angle automatically changes to Angle 2 for dew prevention.
- Page 14 PROGRAM TIMER • OFF timer and ON timer can be used in combination. The set time that is reached first will operate first. • “ ” and “ ” display show the order of OFF timer and ON timer operation. (Example 1) The current time is 8:00 PM.
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Page 15: Troubleshooting
TROUBLESHOOTING MSZ-WN25VA MSZ-WN35VA 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 miswiring. 2. Take care of 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 power plug. - Page 16 10-2. FAILURE MODE RECALL FUNCTION Outline of the function This air conditioner can memorize the abnormal condition which has occurred once. Even though LED indication listed on the troubleshooting check table (10-4.) disappears, the memorized failure details can be recalled. This mode is very useful when the unit needs to be repaired for the abnormality which does not recur.
- Page 17 NOTE: Blinking patterns of this mode differ from the ones of TROUBLESHOOTING CHECK TABLE (10-4.). 2. Indoor unit failure recall mode table Upper lamp of OP- Abnormal point ERATION INDICA- Condition Remedy (Failure mode) TOR lamp Not lighted Normal — —...
- Page 18 10-3. INSTRUCTION OF TROUBLESHOOTING Start Indoor unit operates. Indoor unit oper- Indoor unit does OPERATION INDICATOR Outdoor unit does ates. not receive lamp on the indoor unit is not operate normally. the signal from Outdoor unit fl ashing on and off. does not operate.
- Page 19 10-4. TROUBLESHOOTING CHECK TABLE Before taking measures, make sure that the symptom reappears for accurate troubleshooting. When the indoor unit has started operation and detected an abnormality of the following condition (the first detection after the power ON), the indoor fan motor turns OFF and OPERATION INDICATOR lamp flashes. OPERATION INDICATOR Lighted Blinking...
- Page 20 10-5. TROUBLE CRITERION OF MAIN PARTS MSZ-WN25VA MSZ-WN35VA Part name Check method and criterion Figure Measure the resistance with a tester. Room temperature thermistor (RT11) Refer to 10-7. "Test point diagram and voltage", "2. Indoor electronic control Indoor coil thermistor P.C.
- Page 21 10-6. TROUBLESHOOTING FLOW A Check of indoor fan motor The indoor fan motor error has occurred, and the indoor fan does not operate. Turn OFF the power supply. Pay enough attention to the high voltage on the fan motor connector CN211. Turn ON the power supply, wait 5 seconds or more, and then press EMERGENCY OPERATION switch.
- Page 22 B Check of remote controller and indoor electronic control P.C. board Check if the remote controller is exclusive for this air conditioner. Press STOP/OPERATE/ (OFF/ON) button on the remote controller. 1 Look at the image of the signal transmitting section of Is LCD display on the remote controller Replace the batteries.
- Page 23 C Check of indoor P.C. board and indoor fan motor Turn OFF the power supply. Remove indoor fan motor connector CN211 from indoor power P.C. board and vane Measure the resistance of indoor fan Short circuit: motor connector CN151 from the indoor motor.
- Page 24 D How to check miswiring and serial signal error Turn OFF the power supply. Is there rated voltage in the Check the power supply. power supply? 1. Turn ON the power supply. 2. Press the emergency operation switch. Has the relay 52C been turned on 3 minuets later ? [The relay will be turned on in 3 to 7 seconds by bridging the timer short mode point (Refer to 10-7.).] Initializing the determination of the power...
- Page 25 E Electromagnetic noise enters into TV sets or radios Is the unit earthed? Earth the unit. Is the distance between the antennas Extend the distance between the antennas and and the indoor unit within 3 m, or is the the indoor unit, and/or the antennas and the distance between the antennas and the outdoor unit.
- Page 26 10-7. TEST POINT DIAGRAM AND VOLTAGE MSZ-WN25VA MSZ-WN35VA 1. Indoor power P.C. board Connector to Fuse (F11) Terminal block T3.15AL250V Varistor (NR11) Resistor (R111) (CN201) Connector to Indoor fan motor (CN211) (+)0 or 15 VDC (+)3-6 VDC 15 VDC (-) GND (High voltage DC) 325 VDC 12 VDC GND...
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Page 27: Disassembly Instructions
DISASSEMBLY INSTRUCTIONS <"Terminal with locking mechanism" Detaching points> The terminal which has the locking mechanism can be detached as shown below. There are 2 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. - Page 28 OPERATING PROCEDURE PHOTOS 2. Removing the indoor power P.C. board and the Photo 2 Earth wire electrical box (1) Remove the panel. (Refer to 1.) Remove the right corner box. (2) Disconnect the following connectors: <Indoor electronic control P.C. board> Screw of the CN151 (Vane motor) electrical cover...
- Page 29 OPERATING PROCEDURE PHOTOS 3. Removing the indoor electronic control P.C. Photo 4 board Control P.C. board holder (Inside) (1) Remove the panel. (Refer to 1.) Remove the right corner Catch box. (2) Disconnect the following connectors: Indoor electronic <Indoor electronic control P.C. board> control P.C.
- Page 30 OPERATING PROCEDURE PHOTOS 5. Removing the indoor fan motor, the indoor coil Photo 6 thermistor and the line flow fan (1) Remove the panel. (Refer to 1.) Remove the corner box. (2) Remove the control P.C. board holder, the electrical box and the nozzle assembly.
- Page 31 Fixing the indoor coil thermistor There are 2 forms of parts for fixing the indoor coil thermistor. When fixing the indoor coil thermistor to the clip-shape/holder-shape part, the Clip shape Holder shape lead wire should point down. About the same length Position and procedure for mounting the clip-shape part 1.
- Page 32 HEAD OFFICE: TOKYO BUILDING, 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN © Copyright 2016 MITSUBISHI ELECTRIC CORPORATION Published: Dec. 2016. No. OBH764 Specifications are subject to change without notice. Made in Japan...