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Mitsubishi Electric Mr. Slim MSZ-GE06NA Service Manual

Split-type indoor unit
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SPLIT-TYPE AIR CONDITIONERS

INDOOR UNIT

SERVICE MANUAL

Models
MSZ-GE06NA
MSZ-GE09NA
MSZ-GE12NA
MSZ-GE15NA
MSZ-GE18NA
MSY-GE09NA
MSY-GE12NA
MSY-GE15NA
MSY-GE18NA
NOTE:
RoHS compliant products have mark on the spec name plate.
Outdoor unit service manual
MUZ-GE•NA MUY-GE•NA Series (OBH549)
MXZ-A·NA Series (OB444)
CONTENTS
2. PART NAMES AND FUNCTIONS ····················· 2
3. SPECIFICATION ················································ 3
4. OUTLINES AND DIMENSIONS ························ 5
5. WIRING DIAGRAM ············································ 6
6. REFRIGERANT SYSTEM DIAGRAM ··············· 7
7. SERVICE FUNCTIONS ····································· 8
8. MICROPROCESSOR CONTROL ··················· 10
9. TROUBLESHOOTING ····································· 16
10. DISASSEMBLY INSTRUCTIONS ···················· 28
PARTS CATALOG (OBB548)
No. OBH548
·······································
2

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  Summary of Contents for Mitsubishi Electric Mr. Slim MSZ-GE06NA

  • Page 1: Table Of Contents

    SPLIT-TYPE AIR CONDITIONERS INDOOR UNIT No. OBH548 SERVICE MANUAL Models MSZ-GE06NA MSZ-GE09NA MSZ-GE12NA MSZ-GE15NA MSZ-GE18NA MSY-GE09NA MSY-GE12NA MSY-GE15NA Outdoor unit service manual MSY-GE18NA MUZ-GE•NA MUY-GE•NA Series (OBH549) MXZ-A·NA Series (OB444) CONTENTS 1. TECHNICAL CHANGES ······································· 2. PART NAMES AND FUNCTIONS ····················· 2 3.
  • Page 2: Technical Changes

    TECHNICAL CHANGES MSZ-GE06NA MSZ-GE09NA MSZ-GE12NA MSZ-GE15NA MSZ-GE18NA MSY-GE09NA MSY-GE12NA MSY-GE15NA MSY-GE18NA 1. New model PART NAMES AND FUNCTIONS MSZ-GE06NA MSZ-GE09NA MSZ-GE12NA MSZ-GE15NA MSZ-GE18NA MSY-GE09NA MSY-GE12NA MSY-GE15NA MSY-GE18NA Air filter (Catechin air filter) Front panel Air cleaning filter (Anti-Allergy Enzyme Filter)
  • Page 3: Specification

    SPECIFICATION MSZ-GE09NA MSZ-GE12NA Indoor model MSZ-GE06NA MSY-GE09NA MSY-GE12NA Power supply V, phase, Hz 208/230, 1, 60 Max. fuse size (time delay)/ Disconnect switch A Min. circuit ampacity Fan motor F.L.A 0.76 COOL Dry 399-321-237-170-145 Airfl ow (Wet) (364-286-201-134-109) Super High - High - Med. -...
  • Page 4 HEAT 20.6 29.5 the unit properly at the High speed posi- 16.3 23.5 MSZ-GE06NA tion. COOL 14.5 21.0 The coverage should be used only as a general guideline since it varies accord- HEAT 20.6...
  • Page 5: Outlines And Dimensions

    OUTLINES AND DIMENSIONS MSZ-GE06NA MSZ-GE09NA MSZ-GE12NA MSZ-GE15NA MSZ-GE18NA Unit: inch MSY-GE09NA MSY-GE12NA MSY-GE15NA MSY-GE18NA 7/16×13/16 Oblong hole 7/16×1 Oblong hole 8-7/8 8-7/8 3-1/8 3-1/8 Installation plate 31-7/16 30-15/16 6-1/8 6-1/8 2-3/8 13-5/16 13-9/16 2-1/8 Air in Wall hole ø2-9/16 9-1/8...
  • Page 6: Wiring Diagram

    WIRING DIAGRAM MSZ-GE06NA MSZ-GE09NA MSZ-GE12NA MSZ-GE15NA MSZ-GE18NA MSY-GE09NA MSY-GE12NA MSY-GE15NA MSY-GE18NA...
  • Page 7: Refrigerant System Diagram

    REFRIGERANT SYSTEM DIAGRAM MSZ-GE06NA MSZ-GE09NA MSZ-GE12NA MSZ-GE15NA MSZ-GE18NA Unit: inch MSY-GE09NA MSY-GE12NA MSY-GE15NA MSY-GE18NA Refrigerant pipe ø3/8 (MSZ-GE06/09/12NA, MSY-GE09/12NA) ø1/2 (MSZ-GE15/18NA, MSY-GE15/18NA) (with heat insulator) Indoor coil Indoor thermistor heat RT12 (main) exchanger Flared connection Indoor coil thermistor RT13 (sub)
  • Page 8: Service Functions

    SERVICE FUNCTIONS MSZ-GE06NA MSZ-GE09NA MSZ-GE12NA MSZ-GE15NA MSZ-GE18NA MSY-GE09NA MSY-GE12NA MSY-GE15NA MSY-GE18NA 7-1. TIMER SHORT MODE For service, set time can be shortened by short circuit of JPG and JPS the indoor electronic control P.C. board. The time will be shortened as follows. (Refer to 9-7.) Set time: 1-minute →...
  • Page 9 7-3. AUTO RESTART FUNCTION When the indoor unit is controlled with the remote controller, the operation mode, the set temperature, and the fan speed are memorized by the indoor electronic control P.C. board. “AUTO RESTART FUNCTION” automatically starts operation in the same mode just before the shut-off of the main power. Operation If the main power has been cut, the operation settings remain.
  • Page 10: Microprocessor Control

    MICROPROCESSOR CONTROL MSZ-GE06NA MSZ-GE09NA MSZ-GE12NA MSZ-GE15NA MSZ-GE18NA MSY-GE09NA MSY-GE12NA MSY-GE15NA MSY-GE18NA WIRELESS REMOTE CONTROLLER E.g.: MSZ type Signal transmitting section Operation display section OPERATE/STOP FAN SPEED CONTROL button (ON/OFF) button OFF TIMER button OPERATION SELECT button ON TIMER button ECONO COOL button...
  • Page 11 8-1. COOL ( ) OPERATION (1) Press OPERATE/STOP (ON/OFF) 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 (TOO WARM or TOO COOL button) to select the desired temperature. The setting range is 61 ~ 88°F (16 ~ 31°C).
  • Page 12 (4) The initial set temperature is decided by the initial room temperature. Initial room temperature Model Initial set temperature 79°F (26°C) or more 75°F (24°C) COOL mode of "I FEEL CONTROL" 77 to 79°F (25 to 26°C) Initial room temperature minus 4°F (2°C) DRY mode of Less than 79°F (25°C) Initial room temperature minus 4°F (2°C)
  • Page 13 8-7. 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 (approx. 12 V) transmitted from indoor microprocessor. (2) The horizontal vane angle and mode change as follows by pressing VANE CONTROL button.
  • Page 14 (10) ECONO COOL ( ) operation (ECONOmical operation) When ECONO COOL button is pressed in COOL mode, set temperature is automatically set 4°F(2°C) higher. Also the horizontal vane swings in various cycle. SWING operation makes you feel cooler than set temperature. So, even though the set temperature is higher, the air conditioner can keep comfort.
  • Page 15 8-9. SMART SET ( ) OPERATION 1. How to SET SMART SET operation (1) Press OPERATE/STOP (ON/OFF) button. (2) Select COOL, HEAT(MSZ) or ECONO COOL mode. (3) Press SMART SET button. (4) Set the temperature, fan speed, and airfl ow direction for SMART SET operation. NOTE: •...
  • Page 16: Troubleshooting

    TROUBLESHOOTING MSZ-GE06NA MSZ-GE09NA MSZ-GE12NA MSZ-GE15NA MSZ-GE18NA MSY-GE09NA MSY-GE12NA MSY-GE15NA MSY-GE18NA 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 unit first with the remote controller, and then after confirm- ing the horizontal vane is closed, turn OFF the breaker and/or disconnect the power plug.
  • Page 17: Failure Mode Recall Function

    9-2. 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 (9-4.) disappears, the memorized failure details can be recalled. 1.
  • Page 18 2. Indoor unit failure mode table Upper lamp of OP- Abnormal point ERATION INDICA- Condition Remedy (Failure mode) TOR lamp Not lighted Normal — — The room temperature thermistor short or 1-time fl ash every Room temperature Refer to the characteristics of the room temperature open circuit is detected every 8 seconds dur- 0.5-second thermistor...
  • Page 19 9-3. INSTRUCTION OF TROUBLESHOOTING Start Indoor unit operates. Indoor unit does Indoor unit oper- OPERATION INDICATOR Outdoor unit does ates. not receive the lamp on the indoor unit is not operate normally. signal from re- Outdoor unit fl ashing ON and OFF. does not operate.
  • Page 20: Troubleshooting Check Table

    9-4. 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 21 fi rst has manual. setting not operate. the priority. 9-5. TROUBLE CRITERION OF MAIN PARTS MSZ-GE06NA MSZ-GE09NA MSZ-GE12NA MSZ-GE15NA MSZ-GE18NA MSY-GE09NA MSY-GE12NA MSY-GE15NA MSY-GE18NA Part name Check method and criterion Figure Measure the resistance with a tester.
  • Page 22: Troubleshooting Flow

    9-6. 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 23 B Check of remote controller and indoor electronic control P.C. board Check if the remote controller is exclusive for this air conditioner. Press OPERATE/STOP (ON/OFF) button on the remote controller. Is LCD display on the remote controller Replace the batteries. (Refer to 9-1.4.) visible? (Not clear) Remove the batteries, then set them back...
  • Page 24 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 25 D How to check miswiring and serial signal error Turn OFF the power supply. Is there rated voltage in the power supply? Check the power supply. Turn ON the power supply. Check the wiring. Is there rated voltage between outdoor terminal block S1 and S2? Press EMERGENCY OPERATION switch once.
  • Page 26 E Electromagnetic noise enters into TV sets or radios Is the unit grounded? Ground the unit. Is the distance between the antennas Extend the distance between the antennas and and the indoor unit within 9.91 ft., or is the indoor unit, and/or the antennas and the the distance between the antennas and outdoor unit.
  • Page 27 9-7. Test point diagram and voltage 1. Indoor power P.C. board, Indoor terminal P.C. board Indoor terminal P.C. board Indoor power P.C. board Varistor (NR11) Resistor (R111) Fuse (F11)( ) Indoor fan motor (CN211) 294/325 VDC (–) GND (high- voltage DC) 15 VDC (+)3-6 VDC (+)0-6 V...
  • Page 28: Disassembly Instructions

    Pull the terminal while pull out the terminal pushing the locking slowly. Locking lever lever. Connector MSZ-GE06NA MSZ-GE09NA MSZ-GE12NA MSZ-GE15NA MSZ-GE18NA MSY-GE09NA MSY-GE12NA MSY-GE15NA MSY-GE18NA NOTE: Turn OFF power supply before disassembling. OPERATING PROCEDURE PHOTOS 1. Removing the panel Photo 1 (1) Remove the horizontal vanes.
  • Page 29 OPERATING PROCEDURE PHOTOS Electrical box 2. Removing the indoor electronic control P.C. Photo 2 Ground wire board and the room temperature thermistor Screw of the (1) Remove the panel (Refer to 1.) and the corner box. electrical cover (2) Remove the screw of the V.A. clamp and the V.A. clamp.
  • Page 30 OPERATING PROCEDURE PHOTOS 4. Removing the nozzle assembly Photo 4 (1) Remove the panel (Refer to 1.) and the corner box. Screws of horizontal vane motor unit (2) Remove the indoor/outdoor connecting wire (Refer to 2 (2)-(5).). (3) Remove the indoor electronic control P.C. board hold- (4) Pull out the drain hose from the nozzle assembly and remove the nozzle assembly.
  • Page 31 OPERATING PROCEDURE PHOTOS 6. Removing the indoor fan motor, the indoor coil Photo 5 thermistor, and the line flow fan (1) Remove the panel (Refer to 1.) and the corner box. (2) Remove the indoor electronic control P.C. board hold- er, the electrical box and the nozzle assembly.
  • Page 32 HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN © Copyright 2009 MITSUBISHI ELECTRIC CO.,LTD New publication, effective Jul. 2009 Distributed in Jul. 2009. No. OBH548 5 Specifications subject to change without notice. Made in Japan...