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INDOOR UNIT
SERVICE MANUAL
Models
MSZ-AP15VG
MSZ-AP20VG
MSZ-AP15VGK
MSZ-AP20VGK
MSZ-AP15VG
MSZ-AP20VG
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E1
ET1
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ET2
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Outdoor unit service manual
MUZ-AP∙VG Series (OBH839)
MXZ-D∙VA Series (OBH626)
MXZ-E∙VA Series (OBH723)
MXZ-F∙VF Series (OBH790)
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 ··········· 11
8. SERVICE FUNCTIONS ······························ 12
9. MICROPROCESSOR CONTROL ················ 14
10. TROUBLESHOOTING ······························· 21
11. DISASSEMBLY INSTRUCTIONS ················· 35
PARTS CATALOG (OBB838)
Revision B:
• MSZ-AP15/20VG-
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and
E2
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MSZ-AP15/20VGK-
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OBH838 REVISED EDITION-A is void.
No. OBH838
REVISED EDITION-B
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have
ER1
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Table of Contents
Related Manuals for Mitsubishi Electric MSZ-AP15VG-E1
Summary of Contents for Mitsubishi Electric MSZ-AP15VG-E1
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Page 1: Table Of Contents
Revision B: • MSZ-AP15/20VG- MSZ-AP15/20VGK- have been added. OBH838 REVISED EDITION-A is void. INDOOR UNIT No. OBH838 REVISED EDITION-B SERVICE MANUAL Models MSZ-AP15VG MSZ-AP20VG MSZ-AP15VGK MSZ-AP20VGK Outdoor unit service manual MUZ-AP∙VG Series (OBH839) MXZ-D∙VA Series (OBH626) MXZ-E∙VA Series (OBH723) MXZ-F∙VF Series (OBH790) CONTENTS 1. - Page 2 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.
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Page 3: Technical Changes
TECHNICAL CHANGES These models are compatible with the outdoor units with low standby power control. Connecting these models to the MUZ-AP·VG series outdoor units enables the low standby power control. These models may be connected to the MUZ-AP·VG series after once connected to the MXZ series and operated, for exam- ple because of relocation. -
Page 4: Part Names And Functions
PART NAMES AND FUNCTIONS MSZ-AP15VG MSZ-AP15VGK MSZ-AP20VG MSZ-AP20VGK Air inlet Wi-Fi interface MSZ-AP·VGK Front panel Air fi lter Horizontal vane Air outlet Heat exchanger Emergency Spec name plate operation switch Remote controller Operation indicator lamp Remote control receiving section ACCESSORIES (1) Installation plate (2) Installation plate fixing screw 4 ×... -
Page 5: Specification
SPECIFICATION MSZ-AP15VG MSZ-AP20VG Indoor model MSZ-AP15VGK MSZ-AP20VGK Power supply Single phase 230 V, 50 Hz Cooling Power input *1 Heating Cooling 0.17 0.19 Running current *1 Heating 0.17 0.19 Model RC0J30-CW Cooling 0.17 0.19 Current *1 Heating 0.17 0.19 Dimensions W × H × D 760 ×... -
Page 6: Noise Criteria Curves
NOISE CRITERIA CURVES MSZ-AP15VG MSZ-AP15VGK MSZ-AP20VG MSZ-AP20VGK FUNCTION SPL(dB(A)) FUNCTION SPL(dB(A)) FAN SPEED LINE FAN SPEED 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... -
Page 7: Outlines And Dimensions
OUTLINES AND DIMENSIONS Unit: mm MSZ-AP15VG MSZ-AP15VGK MSZ-AP20VG MSZ-AP20VGK INSTALLATION PLATE 11×26 OBLONG HOLE 11×20 OBLONG HOLE INDOOR UNIT (45) ø WALL HOLE 299.5 80.5 335.5 AIR IN INSTALLATION PLATE PIPING MIN 20mm MIN 30mm DRAIN HOSE (66) AIR OUT Insulation ø35 O.D Liquid line... -
Page 8: Wiring Diagram
WIRING DIAGRAM MSZ-AP15VG - MSZ-AP20VG - MSZ-AP15VG - MSZ-AP20VG - SEMBOL PARÇA ADI SEMBOL PARÇA ADI SİGORTA ODA SICAKLIK DIŞ ÜNİTEYE (T3.15AL250V) TERMİSTÖRÜ BORU SICAKLIK FAN MOTORU TERMİSTÖRÜ(ANA) KANAT MOTORU BORU SICAKLIK (YATAY ÜST) TERMİSTÖRÜ(YARDIMCI) KANAT MOTORU TERMİNAL BLOĞU (YATAY ALT) İÇ... - Page 9 MSZ-AP15VG - MSZ-AP20VG - MSZ-AP15VG - MSZ-AP20VG - SEMBOL PARÇA ADI SEMBOL PARÇA ADI ODA SICAKLIK SİGORTA DIŞ (T3.15AL250V) TERMİSTÖRÜ ÜNİTEYE BORU SICAKLIK FAN MOTORU TERMİSTÖRÜ(ANA) BORU SICAKLIK KANAT MOTORU (YATAY ÜST) TERMİSTÖRÜ(YARDIMCI) KANAT MOTORU TERMİNAL BLOĞU (YATAY ALT) VARİSTÖR RÖLE İÇ...
- Page 10 MSZ-AP15VGK - MSZ-AP20VGK - MSZ-AP15VGK - MSZ-AP20VGK - SEMBOL PARÇA ADI SEMBOL PARÇA ADI ODA SICAKLIK SİGORTA DIŞ (T3.15AL250V) TERMİSTÖRÜ ÜNİTEYE BORU SICAKLIK FAN MOTORU TERMİSTÖRÜ(ANA) BORU SICAKLIK KANAT MOTORU (YATAY ÜST) TERMİSTÖRÜ(YARDIMCI) KANAT MOTORU TERMİNAL BLOĞU (YATAY ALT) Wİ-Fİ ARAYÜZÜ...
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Page 11: Refrigerant System Diagram
REFRIGERANT SYSTEM DIAGRAM MSZ-AP15VG MSZ-AP15VGK MSZ-AP20VG MSZ-AP20VGK Unit: mm Refrigerant pipe ø9.52 (with heat insulator) Indoor coil Indoor thermistor heat RT12 (main) exchanger Flared connection Indoor coil thermistor RT13 (sub) Room temperature thermistor RT11 Flared connection Refrigerant pipe ø6.35 (with heat insulator) Refrigerant flow in cooling Refrigerant flow in heating OBH838B... -
Page 12: Service Functions
SERVICE FUNCTIONS MSZ-AP15VG MSZ-AP15VGK MSZ-AP20VG MSZ-AP20VGK 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.) • The set time for the ON/OFF timer can be reduced to 1 second for each minute. •... - Page 13 Third party Wi-Fi interfaces cannot be connected to MELCloud. MODE LED (Orange) It shows the Access point mode state. Mitsubishi Electric is not responsible for any (i) under performance of a sys- UNIT LED (Green) It shows the indoor unit state.
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Page 14: Microprocessor Control
MICROPROCESSOR CONTROL MSZ-AP15VG MSZ-AP15VGK MSZ-AP20VG MSZ-AP20VGK WIRELESS REMOTE CONTROLLER Battery replacement indicator Signal transmitting section Distance of signal : About 6 m Beep(s) is (are) heard from the indoor unit when the signal is received Operation display section Operation select button FAN speed control button (Backlight display) VANE control button... - Page 15 9-1. COOL ( ) OPERATION (1) Press OFF/ON(stop/operate) button. OPERATION INDICATOR lamp of the indoor unit turns on with a beep tone. (2) Select COOL mode with Operation select button. (3) Press Temperature buttons (TEMP button) to select the desired temperature. The setting range is 16 - 31°C. 1.
- Page 16 9-5. AUTO CHANGE OVER ∙∙∙ AUTO MODE OPERATION Once desired temperature is set, unit operation is switched automatically between COOL and HEAT operation. Mode selection (1) Initial mode When unit starts the operation with AUTO operation from OFF: • If the room temperature is higher than the set temperature, operation starts in COOL mode. •...
- Page 17 (5) STOP (operation OFF) and ON TIMER standby In the following cases, the horizontal vane returns to the closed position. (a) When OFF/ON(stop/operate) 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 4 or 5 when the compressor cumulative operation time exceeds 1 hour, the vane angle automatically changes to Angle 1 for dew prevention.
- Page 18 PROGRAM TIMER • OFF timer and ON timer can be used in combination. The set time that is reached first will operate first. • “ ” and “ ” display shows the order of OFF timer and ON timer operation. (Example 1) The current time is 8:00 PM.
- Page 19 (3) Press , and buttons to set ON/OFF, time, and temperature. E.g. : [ON], [6:00] and [24°C] are selected. Pressing selects ON/OFF timer. Pressing Pressing adjusts the time. adjusts the tem- Pressing perature. deletes timer setting. * Hold down the button to change the time quickly. Press buttons to continue setting the timer for other days and/or numbers.
- Page 20 9-10. i-save ( ) OPERATION 1. How to set i-save operation (1) Press OFF/ON(stop/operate) button. (2) Select COOL, HEAT, ECONO COOL or NIGHT MODE. (3) Press i-save button. (4) Set the temperature, fan speed, and airflow direction for i-save operation. NOTE: •...
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Page 21: Troubleshooting
TROUBLESHOOTING MSZ-AP15VG MSZ-AP15VGK MSZ-AP20VG MSZ-AP20VGK 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 22 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. 1.
- Page 23 2. Table of indoor unit failure mode recall function Left lamp of OP- Abnormal point ERATION INDICA- Condition Remedy (Failure mode) TOR lamp Not lit Normal — — The room temperature thermistor short or 1-time blink every Room temperature Refer to the characteristics of the room temperature open circuit is detected every 8 seconds dur- 0.5-second thermistor...
- Page 24 10-3. INSTRUCTION OF TROUBLESHOOTING 1. Check of the unit. *2 There is possibility that diesel explosion may occur due to the air mixied in the refrigerant circuit. First, ensure that there are no leakage points on the valves, flare connections, etc. that allow the air to flow into the refrigerant circuit, or no blockage points (e.g.
- Page 25 2. Check of Wi-Fi interface (MSZ-AP·VGK) Follow the procedure below if the air conditioner cannot be monitored or controlled with a device such as a smartphone. Start There is a problem in communication between the air conditioner and Is the UNIT LED on the Wi-Fi interface blinking? the Wi-Fi interface.
- Page 26 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 blinks. OPERATION INDICATOR Blinking Not lit...
- Page 27 OPERATION INDICATOR Blinking Not lit Abnormal Operation indicator lamp Symptom Condition Remedy point Left lamp lights and lower lamp blinks. The operation mode of the each indoor unit MXZ type Outdoor unit is differently set to COOL (includes DRY) and •...
- Page 28 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. Turn ON the power supply, wait 5 seconds or more, and then press the emergency operation switch.
- Page 29 B Check of remote controller and indoor electronic control P.C. board *Check if the remote controller is exclusive for this air conditioner. Press OFF/ON(stop/operate) button on the remote controller. Look at the image of the signal transmitting section of the remote controller through the monitor of a digital camera or a camera phone.
- Page 30 C Check of indoor P.C. board and indoor fan motor Turn OFF the power supply. Remove indoor fan motor connector CN211 and vane motor connector CN151 from the Measure the resistance of indoor fan Short circuit: indoor electronic control P.C. board and turn motor.
- Page 31 D How to check miswiring and serial signal error Turn the main power supply OFF. Is there rated voltage in the power supply? Check the power supply. Check for incorrect indoor-outdoor connecting wiring. Was the indoor unit ever connected to the Multi (MXZ) series and operated (turned on)? The connection information to the Multi series is stored...
- Page 32 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 33 10-7. TEST POINT DIAGRAM AND VOLTAGE MSZ-AP15VG- MSZ-AP20VG- Indoor electronic control P.C. board Power supply/ Fuse (F11) serial cord (CN201) T3.15AL250V Varistor (NR11) Resistor 230 V AC (R111) To disable "Auto restart function", cut the jumper wire to JR77. (Refer to 8-3.) Indoor fan motor (CN211) (+) 0 V DC or...
- Page 34 MSZ-AP15VG- MSZ-AP15VGK- MSZ-AP20VG- MSZ-AP20VGK- Indoor electronic control P.C. board Power supply/ Fuse (F11) serial cord (CN201) T3.15AL250V Varistor (NR11) Resistor 230 V AC (R111) To disable "Auto restart function", cut the jumper wire to JR77. Indoor fan motor (Refer to 8-3.) (CN211) (+) 0 V DC or 15 V DC...
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Page 35: Disassembly Instructions
DISASSEMBLY INSTRUCTIONS <Detaching method of the terminal with locking mechanism> The terminal which has the locking mechanism can be detached as shown below. There are following 2 types 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 36 OPERATING PROCEDURE PHOTOS/FIGURES 2. Removing the indoor electronic control P.C. Photo 2 board, receiver P.C. board, display P.C. board, and SW P.C. board (1) Remove the panel (refer to section 1) and the corner box. Screw of the (2) Remove the screw of the V.A. clamp. Remove the V.A. V.A.
- Page 37 OPERATING PROCEDURE PHOTOS/FIGURES Photo 5 3. Removing the electrical box Front cover of the display holder (1) Remove the panel (refer to section 1) and the corner box. Catch (2) Remove the indoor/outdoor connecting wire, the SW holder, the display holder, the electrical cover and the Catch earth wire connected to the indoor electronic control P.C.
- Page 38 OPERATING PROCEDURE PHOTOS/FIGURES 6. Removing the indoor fan motor and the line flow fan Photo 8 Catches of the water cover (1) Remove the panel (refer to section 1) and the corner box. (2) Remove the SW holder, the display P.C. board holder, Motor band the electrical box (refer to section 3) and the nozzle assembly (refer to section 4).
- Page 39 11-2. MSZ-AP15VGK MSZ-AP20VGK NOTE: Turn OFF the power supply before disassembly. OPERATING PROCEDURE PHOTOS/FIGURES 1. Removing the panel Photo 1 (1) Remove the horizontal vanes. (2) Remove the screw caps of the panel. Remove the screws. Horizontal vanes Front panel (3) Unhook the lower part ( ) of the panel.
- Page 40 OPERATING PROCEDURE PHOTOS/FIGURES Wi-Fi interface 2. Removing the indoor electronic control P.C. Photo 2 board, receiver P.C. board, display P.C. board, and SW P.C. board, Wi-Fi interface (1) Remove the panel (refer to section 1) and the corner box. Screw of the (2) Remove the screw of the V.A.
- Page 41 OPERATING PROCEDURE PHOTOS/FIGURES Photo 5 3. Removing the electrical box Front cover of the display holder (1) Remove the panel (refer to section 1) and the corner box. Catch (2) Remove the indoor/outdoor connecting wire, the SW holder, the display holder, the electrical cover and the Catch earth wire connected to the indoor electronic control P.C.
- Page 42 OPERATING PROCEDURE PHOTOS/FIGURES 6. Removing the indoor fan motor and the line flow fan Photo 8 Catches of the water cover (1) Remove the panel (refer to section 1) and the corner box. (2) Remove the SW holder, the display P.C. board holder, Motor band the electrical box (refer to section 3) and the nozzle assembly (refer to section 4).
- Page 43 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 44 HEAD OFFICE: TOKYO BUILDING., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN © Copyright 2019 MITSUBISHI ELECTRIC CORPORATION Issued: Nov. 2020. No. OBH838 REVISED EDITION-B Issued: Dec. 2019. No. OBH838 REVISED EDITION-A Published: Apr. 2019. No. OBH838 Made in Japan Specifications are subject to change without notice.