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INDOOR UNIT
INDOOR UNIT
SERVICE MANUAL
Models
MS-CP13VA
MS-CP18VA
MS-CP24VA
MS-CP30VA
MS-CP13VA
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GU1
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GU1
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GU1
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GU1
CONTENTS
1. TECHNICAL CHANGES ······························2
2. PART NAMES AND FUNCTIONS ··················3
3. SPECIFICATION ········································6
4. OUTLINES AND DIMENSIONS ·····················7
5. WIRING DIAGRAM ·····································9
6. REFRIGERANT SYSTEM DIAGRAM ··········· 10
7. SERVICE FUNCTIONS ······························ 12
8. MICROPROCESSOR CONTROL ················ 14
9. TROUBLESHOOTING ······························· 20
10. DISASSEMBLY INSTRUCTIONS ················· 41
PARTS CATALOG (OBB782)
Revision A:
• MS-CP30VA -
has been added.
GU1
OBH782 is void.
No. OBH782
HFC
REVISED EDITION-A
utilized
R410A
Outdoor unit service manual
MU-CP∙VA Series (OBH783)
TM
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Table of Contents
Related Manuals for Mitsubishi Electric MS-CP13VA
Summary of Contents for Mitsubishi Electric MS-CP13VA
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Page 1: Table Of Contents
OBH782 is void. INDOOR UNIT INDOOR UNIT No. OBH782 REVISED EDITION-A utilized SERVICE MANUAL R410A Models MS-CP13VA MS-CP18VA MS-CP24VA MS-CP30VA Outdoor unit service manual MU-CP∙VA Series (OBH783) CONTENTS 1. TECHNICAL CHANGES ······························2 2. PART NAMES AND FUNCTIONS ··················3 3. SPECIFICATION ········································6 4. -
Page 2: Technical Changes
When pumping down the refrigerant, stop the compressor before disconnecting the refrigerant pipes. The compressor may burst if air etc. get into it. Revision A: • MS-CP30VA - has been added. TECHNICAL CHANGES MS-CP13VA - MS-CP18VA - MS-CP24VA - 1. New model MS-CP30VA - 1. New model... -
Page 3: Part Names And Functions
PART NAMES AND FUNCTIONS MS-CP13VA Front panel Heat exchanger Air fi lter Air inlet (Nano platinum fi lter) Air cleaning fi lter (Electrostatic anti- allergy enzyme fi lter, option) Air outlet Horizontal vane Remote controller Display section Remote control receiving section... - Page 4 MS-CP18VA MS-CP24VA Front panel Air fi lter (Nano platinum fi lter) Air cleaning fi lter (Electrostatic anti-al- lergy enzyme fi lter, option) Air inlet Air outlet Heat exchanger Horizontal vane Remote controller Display section Remote control receiving section Operation indicator lamp Emergency operation switch ACCESSORIES MS-CP18VA...
- Page 5 MS-CP30VA Air cleaning fi lter (Electrostatics anti-allergy enzyme filter, option) Front panel Air fi lter (Nano platinum fi lter) Air inlet Emergency operation switch Display section Air outlet Operation indicator lamp Remote controller Remote control receiving section Horizontal vane Fan guard ACCESSORIES Model MS-CP30VA...
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Page 6: Specification
SPECIFICATION Indoor model MS-CP13VA MS-CP18VA MS-CP24VA MS-CP30VA Function Cooling Power supply Single phase 220-230-240 V, 50 Hz Running current 0.33 0.53 0.58 0.61 Power input Model RC0J40-EF RC0J56-AF RC0J56-AJ Current 0.61 0.33 0.53 0.58 Dimensions W × H × D 799 ×... -
Page 7: Outlines And Dimensions
OUTLINES AND DIMENSIONS Unit: mm MS-CP13VA 11×26 Oblong hole 11×20 Oblong hole Installation plate 80.5 80.5 Indoor unit 61.5 59.5 Wall hole Φ 65 Air in Installation plate Piping Drain hose Air out Insulation Φ37 O.D Liquid line Φ6.35 - 0.39m (Flared connection Φ6.35) Gas line Φ9.52 - 0.34m (Flared connection Φ12.7) - Page 8 MS-CP30VA Unit: mm Indoor unit 119.5 67.7 1155 Wall hole 75 Air in 1170 Installation plate Piping Drain hose 150.5 Air out Piping Insulation 9.52 - 0.5m 31 O.D Liquid line (Flared connection 9.52) 15 I.D 15.88 - 0.4m 50 O.D Joint connection 15.88-0.4m Gas line 32 I.D...
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Page 9: Wiring Diagram
WIRING DIAGRAM MS-CP13VA MS-CP18VA MS-CP24VA MS-CP30VA OBH782A... -
Page 10: Refrigerant System Diagram
REFRIGERANT SYSTEM DIAGRAM MS-CP13VA Unit: mm Refrigerant pipe ø12.7 (with heat insulator) Indoor coil Indoor thermistor heat RT12 exchanger Flared connection Room temperature thermistor RT11 Flared connection Refrigerant pipe ø6.35 (with heat insulator) Refrigerant flow in cooling MS-CP18VA MS-CP24VA Refrigerant pipe ø15.88... - Page 11 MS-CP30VA Unit: mm Refrigerant pipe ø 19.05 (with heat insulator) Indoor coil Flared connection Indoor thermistor heat Joint RT12 (MAIN) exchanger Joint connection Indoor coil thermistor RT13 (SUB) Room temperature thermistor RT11 Strainer Flared connection Refrigerant pipe ø 9.52 (with heat insulator) Refrigerant flow in cooling OBH782A...
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Page 12: Service Functions
SERVICE FUNCTIONS MS-CP13VA MS-CP18VA MS-CP24VA MS-CP30VA 7-1. 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 9-7.) Set time: 3 minutes → 3 seconds (It takes 3 minutes for the compressor to start operation. However, the starting time is shortened by bridging the timer short mode.) - Page 13 (However, it takes at least 3 minutes for the compressor to start running.) How to disable “AUTO RESTART FUNCTION” Turn OFF the main power for the unit. Cut the jumper wire to JR77 on the indoor electronic control P.C. board. (Refer to 9-7.) MS-CP13VA MS-CP18/24VA Indoor electronic control P.C. board...
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Page 14: Microprocessor Control
MICROPROCESSOR CONTROL MS-CP13VA MS-CP18VA MS-CP24VA MS-CP30VA WIRELESS REMOTE CONTROLLER MS-CP13VA 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 FAN speed control button... - Page 15 INDOOR UNIT DISPLAY SECTION Operation Indicator lamp The operation indicator at the right side of the indoor unit indicates the operation state. •The following indication applies regardless of shape of the indication. Indication Operation state Room temperature MS-CP13/18/24VA MS-CP30VA The unit is operating to About 2°C or more away Not lit reach the set temperature...
- Page 16 When the system is restarted after 2 hours and more, the operation mode is determined by the room temperature at start-up of the operation. Operation time chart Example Restart COOL or DRY mode of “I FEEL CONTROL” that Previous operation determined by room COOL mode of temperature at start-up...
- Page 17 8-5. AUTO VANE OPERATION 1. Horizontal vane (1) Vane motor drive These models are equipped with a stepping motor for the horizontal vane. The rotating direction, speed, and angle of the motor are controlled by pulse signals (approximately 12 V) transmitted from indoor microprocessor. (2) The horizontal vane angle and mode change as follows by pressing VANE control button.
- Page 18 2. Vertical vane (MS-CP18/24/30VA) (1) Vane motor drive These models are equipped with a stepping motor for the vertical vane. The rotating direction, speed, and angle of the motor are controlled by pulse signals (approximately 12 V) transmitted from microprocessor. (2) The vertical vane angle and mode change as follows by pressing WIDE VANE button.
- Page 19 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.
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Page 20: Troubleshooting
TROUBLESHOOTING MS-CP13VA MS-CP18VA MS-CP24VA MS-CP30VA 9-1. 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 21 This air conditioner can memorize the abnormal condition which has occurred once. Even though LED indication listed on the troubleshooting check table (9-4.) disappears, the memorized failure details can be recalled. MS-CP18VA MS-CP13VA MS-CP24VA 1. Flow chart of failure mode recall function for the indoor unit MS-CP30VA Operational procedure The cause of abnormality cannot be found because the abnormality does not recur.
- Page 22 NOTE: Blinking patterns of this mode differ from the ones of TROUBLESHOOTING CHECK TABLE (9-4.). 2. Table of indoor unit failure mode recall function Upper/left*1 lamp Abnormal point of OPERATION Condition Remedy (Failure mode) INDICATOR lamp Not lit Normal — —...
- Page 23 9-3. INSTRUCTION OF TROUBLESHOOTING MS-CP13VA MS-CP18VA MS-CP24VA Start Indoor unit does not Indoor unit operates. OPERATION INDICATOR Indoor and outdoor receive the signal Outdoor unit does not lamp on the indoor unit is unit do not operate. from remote control- operate.
- Page 24 MS-CP30VA Start Refer to outdoor unit service manual. Indoor unit operates. Indoor unit does not OPERATION INDICATOR Outdoor unit does receive the signal from lamp on the indoor unit is remote controller. blinking ON and OFF. not operate. Indoor unit Indoor unit does Outdoor unit Outdoor unit...
- Page 25 ON), the indoor fan motor turns OFF and OPERATION INDICATOR lamp blinks. Operation Indicator lamp The operation indicator lamp is at the right side of the indoor unit. •The following indication applies regardless of shape of the indication. MS-CP13VA MS-CP18VA MS-CP24VA OPERATION INDICATOR Blinking Not lit...
- Page 26 MS-CP30VA OPERATION INDICATOR Not lit Abnormal Operation indicator lamp Symptom Condition Remedy point Left lamp blinks. • Refer to 9-6. "How to check 0.5-second ON miswiring and serial signal er- Miswiring The serial signal from the outdoor unit is not ror".
- Page 27 Indoor coil thermistor (RT12 (MAIN), RT13 (SUB)) MS-CP13/18/24/30VA Check 9-6. "Check of indoor fan motor". Indoor fan motor (MF) MS-CP13VA Measure the resistance between the terminals with a tester. Horizontal vane motor (Temperature: 10 - 30°C) (MV) ROTOR Color of the lead wire...
- Page 28 9-6. TROUBLESHOOTING FLOW A Check of indoor fan motor MS-CP13VA 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.
- Page 29 MS-CP18VA MS-CP24VA 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 30 MS-CP30VA 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 the emergency operation switch.
- Page 31 B Check of remote controller and indoor electronic control P.C. board *Check if the remote controller is exclusive for this air conditioner. MS-CP13VA Press OFF/ON (stop/operate) button on the remote controller. Is LCD display on the remote controller Replace the batteries. (Refer to 9-1.4.)
- Page 32 MS-CP30VA Press OFF/ON (stop/operate) button on the remote controller. Replace the batteries. Is LCD display on the remote con- 1 Look at the image of the signal transmitting section of (Refer to 9-1.4.) troller visible? the remote controller through the monitor of a digital (not clear) camera or a camera phone.
- Page 33 Check of indoor electronic control P.C. board and indoor fan motor MS-CP13VA 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 34 MS-CP18VA MS-CP24VA Turn OFF the power supply. Remove indoor fan motor connector CN211 and vane motor Short circuit: Measure the resistance between CN211 Replace the indoor fan motor. connectors CN151 and CN152 from the indoor electronic of the indoor fan motor connector. control P.C.
- Page 35 MS-CP30VA Turn OFF the power supply. Measure the resistance between CN211 Remove indoor fan motor connector CN211 and Short circuit: of the indoor fan motor connector. Replace the indoor fan motor. vane motor connector CN151 and CN152 from the indoor electronic control P.C.
- Page 36 D How to check miswiring and serial signal error MS-CP30VA Turn OFF the power supply. Is there rated voltage Check the power in the power supply? supply. Turn ON the power supply. Is there rated voltage between outdoor terminal block S1 and Check the wiring.
- Page 37 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 38 9-7. TEST POINT DIAGRAM AND VOLTAGE 1. Indoor power P.C. board MS-CP13VA Connector to Fuse (F11) Terminal block T3.15AL250V Resistor (R111) Varistor (NR11) (CN201) Connector to Indoor fan motor (CN211) (+)0 or 15 V DC (+)3-6 V DC 15 V DC...
- Page 39 3. Indoor electronic control P.C. board, Indoor terminal P.C. board, Power monitor receiver SW P.C. board MS-CP18VA MS-CP24VA Indoor electronic control P.C. board To disable "Auto restart function", Indoor terminal P.C. board Indoor coil thermistor cut the Jumper wire to JR77. RT12 (main) (CN112) (Refer to 7-3.) Fuse...
- Page 40 4. Indoor electronic control P.C. board, switch P.C. board, power monitor receiver P.C. board MS-CP30VA Connector to Indoor fan motor (CN211) (+)0 or 15 V DC (+)3-6 V DC Indoor electronic control P.C. board 15 V DC (-) GND To disable "Auto restart Timer short Fuse (F11) function",cut the Jumper...
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Page 41: Disassembly Instructions
Locking lever lever. Connector 10-1. MS-CP13VA : Indicates the visible parts in the photos/figures. : Indicates the invisible parts in the photos/figures. NOTE: Turn OFF the power supply before disassembly. OPERATING PROCEDURE PHOTOS/FIGURES 1. - Page 42 OPERATING PROCEDURE PHOTOS/FIGURES 2. Removing the indoor power P.C. board and the Photo 2 electrical box (1) Remove the panel. (Refer to section 1.) Remove the right corner box. Earth wire (2) Disconnect the following connectors: <Indoor electronic control P.C. board> CN151 (Vane motor) Screw of the CN112 (Indoor coil thermistor)
- Page 43 OPERATING PROCEDURE PHOTOS/FIGURES 3. Removing the indoor electronic control P.C. Photo 4 board Control P.C. board holder (Inside) (1) Remove the panel. (Refer to section 1.) Remove the right Catch corner box. (2) Disconnect the following connectors: Indoor electronic <Indoor electronic control P.C. board> control P.C.
- Page 44 OPERATING PROCEDURE PHOTOS/FIGURES 5. Removing the indoor fan motor, the indoor coil Photo 6 thermistor and the line flow fan (1) Remove the panel. (Refer to section 1.) Remove the right corner box. (2) Remove the control P.C. board holder, the electrical box and the nozzle assembly.
- Page 45 10-2. MS-CP18VA MS-CP24VA NOTE: Turn OFF the power supply before disassembly. OPERATING PROCEDURE PHOTOS/FIGURES 1. Removing the panel Photo 1 (1) Remove the horizontal vanes. Horizontal vanes Front panel (2) Remove the screw caps of the panel. Remove the screws of the panel. (3) Hold the lower part of both ends of the panel and pull it slightly toward you, and then remove the panel by pushing it upward.
- Page 46 OPERATING PROCEDURE PHOTOS/FIGURES 2. Removing the indoor electronic control P.C. Photo 2 board, the power monitor receiver SW P.C. Electrical box board and the indoor terminal P.C. board (1) Remove the panel (Refer to section 1.) and the cor- ner box. (2) Remove the screw of the V.A.
- Page 47 OPERATING PROCEDURE PHOTOS/FIGURES 4. Removing the nozzle assembly Photo 4 (1) Remove the panel (Refer to section 1.) and the corner box. (2) Remove the V.A. clamp, and then the indoor/outdoor connecting wire. (Photo 2) (3) Remove the electrical cover. (Photo 2) Screw of the (4) Disconnect the following connectors on the electronic vertical vane...
- Page 48 OPERATING PROCEDURE PHOTOS/FIGURES 7. Removing the water cut, the indoor fan motor, Photo 8 the indoor coil thermistor, and the line flow fan (1) Remove the panel (Refer to section 1.) and the corner box. (2) Remove the power monitor receiver holder, the electri- cal box and the nozzle assembly.
- Page 49 10-3. MS-CP30VA NOTE: Turn OFF the power supply before disassembly. OPERATING PROCEDURE PHOTOS/FIGURES 1. Removing the panel Photo 1 Front panel (1) Press and unlock the knobs on both sides of the front panel and lift the front panel until it is level, and then pull the hinges forward to remove the front panel.
- Page 50 OPERATING PROCEDURE PHOTOS/FIGURES 3. Removing the nozzle assembly Photo 3 (1) Remove the panel and the corner box. (Refer to sec- tion 1.) (2) Remove the electrical cover. (Refer to section 2.) (3) Remove the electrical side cover, and disconnect the vane motor connector.
- Page 51 OPERATING PROCEDURE PHOTOS/FIGURES 6. Removing the line flow fan and the indoor fan motor Photo 7 (1) Remove the panel and the corner box. (Refer to Screw of the motor band section 1.) (2) Remove the electrical box. (Refer to section 2.) Lead wire of the indoor (3) Remove the nozzle assembly.
- Page 52 Do not pull the lead wire when removing the indoor coil thermistor. HEAD OFFICE: TOKYO BUILDING, 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN © Copyright 2018 MITSUBISHI ELECTRIC CORPORATION Issued: Apr. 2021. No. OBH782 REVISED EDITION-A Published: Mar. 2019. No. OBH782 Made in Japan Specifications are subject to change without notice.