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SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
TECHNICAL & SERVICE MANUAL
R410A
Outdoor unit
[Model Name]
SUZ-SA71VA
[Service Ref.]
SUZ-SA71VA.TH
Indication of
model name
CONTENTS
2. TECHNICAL CHANGES ................................... 3
3. PARTS NAMES AND FUNCTIONS .................. 6
4. SPECIFICATION ................................................ 7
5. NOISE CRITERIA CURVES .............................. 9
6. OUTLINES AND DIMENSIONS ...................... 10
7. WIRING DIAGRAM ........................................... 11
8. REFRIGERANT SYSTEM DIAGRAM ............. 12
9. ACTUATOR CONTROL ................................... 13
10. SERVICE FUNCTIONS .................................... 14
11. TROUBLESHOOTING ..................................... 14
12. DISASSEMBLY INSTRUCTIONS .................... 29
PARTS CATALOG (OCB561)
May 2014
No.OCH561
HFC
utilized
R410A
Note:
• This service manual
describes technical data of
the outdoor units only.
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Related Manuals for Mitsubishi Electric Mr. Slim SUZ-SA71VA
Summary of Contents for Mitsubishi Electric Mr. Slim SUZ-SA71VA
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Page 1: Table Of Contents
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS May 2014 No.OCH561 utilized R410A TECHNICAL & SERVICE MANUAL R410A Outdoor unit Note: [Model Name] [Service Ref.] • This service manual describes technical data of SUZ-SA71VA.TH the outdoor units only. SUZ-SA71VA CONTENTS 1. COMBINATION OF INDOOR AND OUTDOOR UNITS ..2 2. -
Page 2: Combination Of Indoor And Outdoor Units
COMBINATION OF INDOOR AND OUTDOOR UNITS INDOOR UNIT SERVICE MANUAL Outdoor unit Indoor unit Heat pump type Service SUZ-SA71VA.TH Service Ref. Manual No. OCH565 PLA-SP71BA.UK OCB565 PEAD-SP71JA(L)Q.UK — Note: Please refer to the service manual of indoor unit or the technical data book for the combination data. OCH561... -
Page 3: Technical Changes
TECHNICAL CHANGES INFORMATION FOR THE AIR CONDITIONER WITH R410A REFRIGERANT • This room air conditioner adopts an HFC refrigerant (R410A) which never destroys the ozone layer. • Pay particular attention to the following points, though the basic installation procedure is same as that for R22 conditioners. As R410A has working pressure approximate 1.6 times as high as that of R22, some special tools and piping parts/materi- als are required. - Page 4 Conversion chart of refrigerant temperature and pressure (MPa [Gauge]) R410A NOTE: The unit of pressure has been changed to MPa on the international system of units (SI unit system). The conversion factor is: 1 (MPa [Gauge]) =10.2 (kgf/cm [Gauge]) -0.5 -30 -20 -10 1.
- Page 5 2. Refrigerant piping Specifications Use the refrigerant pipes that meet the following specifications. Outside diameter Wall thickness Pipe Insulation material 6.35 For liquid Heat resisting foam plastic 9.52 Specific gravity 0.045 9.52 Thickness 8 mm For gas 12.7 15.88 • Use a copper pipe or a copper-alloy seamless pipe with a thickness of 0.8 mm. Never use any pipe with a thickness less than 0.8mm, as the pressure resistance is insufficient.
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Page 6: Parts Names And Functions
6. Pumping Down When relocating or disposing of the air conditioner, pump down the system by following the procedure below so that no refrigerant is released into the atmosphere. 1 Turn off the power supply (circuit breaker). 2 Connect the gauge manifold valve to the service port of the stop valve on the gas pipe side of the outdoor unit. 3 Fully close the stop valve on the liquid pipe side of the outdoor unit. -
Page 7: Specification
SPECIFICATION SUZ-SA71VA.TH Outdoor model Power supply Single phase 230V, 50Hz Model SNB172FEKMT Output 1,200 Cooling 8.02 Compressor Current* Heating 8.13 Refrigeration oil 0.4 (FV50S) (Model) Model RC0J60-BC Fan motor Cooling 0.83 Current* Heating 0.82 Dimensions W × H × D 840 ×... - Page 8 Specifications and rating conditions of main electric parts SUZ-SA71VA.TH Model SUZ-SA71VA.TH Item (C61) — Smoothing (C62, C63) — capacitor (CB1, 2, 3) 560μF 350V Diode module (DB61) — (F61) — (F62) T20A L250V Fuse (F701, F801, F901) — (IC700) — (IPM) 20A 600V Inteligent power...
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Page 9: Noise Criteria Curves
NOISE CRITERIA CURVES SUZ-SA71VA.TH FAN SPEED FUNCTION SPL(dB(A)) LINE COOLING High HEATING NC-70 NC-60 NC-50 NC-40 NC-30 NC-20 NC-10 1000 2000 4000 8000 BAND CENTER FREQUENCIES, Hz Test conditions OUTDOOR UNIT Cooling: Dry-bulb temperature 35°C Heating: Dry-bulb temperature 7°C Wet-bulb temperature 6°C MICROPHONE OCH561... -
Page 10: Outlines And Dimensions
OUTLINES AND DIMENSIONS SUZ-SA71VA.TH Unit: mm REQUIRED SPACE Open as a rule 500mm or more if the front and both sides are open 417.5 Air in 100mm or more 200mm or more if there are obstacles to both sides Air in Air out 2-Oval holes 10 21 Open as a rule... -
Page 11: Wiring Diagram
WIRING DIAGRAM SUZ-SA71VA.TH OCH561... -
Page 12: Refrigerant System Diagram
REFRIGERANT SYSTEM DIAGRAM SUZ-SA71VA.TH Unit: mm Refrigerant pipe Muffler (with heat insulator) #100 4-way valve ø 15.88 Stop valve (with service port) Outdoor Flared connection Discharge heat Ambient temperature exchanger temperature thermistor Defrost thermistor RT62 thermistor RT65 RT61 Compressor Outdoor heat exchanger temperature thermistor... -
Page 13: Actuator Control
ACTUATOR CONTROL SUZ-SA71VA.TH 9-1. OUTDOOR FAN MOTOR CONTROL The fan motor turns ON/OFF, interlocking with the compressor. [ON] The fan motor turns ON 5 seconds before the compressor starts up. [OFF] The fan motor turns OFF 15 seconds after the compressor has stopped running. 5 seconds 15 seconds Compressor... -
Page 14: Service Functions
SERVICE FUNCTIONS SUZ-SA71VA.TH CHANGE IN DEFROST SETTING Changing defrost finish temperature <JS> To change the defrost finish temperature, cut/solder the JS wire of the outdoor inverter P.C. board. (Refer to "11-6. Test point diagram and voltage".) Defrost finish temperature (°C) Jumper wire SUZ-SA71VA.TH Soldered (Initial setting) - Page 15 11-2. TROUBLE SHOOTING CHECk TABLE SUZ-SA71VA.TH Abnormal point/ check Symptoms Condition Remedy Condition indication code Outdoor unit 1-time flash Outdoor power sys- Overcurrent protection cut-out operates 3 consecutive times • Reconnect connector of compres- does not op- within 1 minute after the compressor gets started. sor.
- Page 16 11-3. HOW TO PROCEED "SELF-DIAGNOSIS" As this air conditioner has a function to memorize all the failures that had occured, the latest failure detail can be recalled by following the procedure below. Use this function when the check code is not displayed with wired remote controller or the remote controller at use is wireless type.
- Page 17 11-3-2. Remote controller check <PAR-30MAA> <PAR-31MAA> If operations cannot be completed with the remote controller, diagnose the remote controller with this function. Select "Service" from the Main menu, and press the button. Maintenance password Remote controller check Select "Remote controller check" with the F1 or F2 button, and press button.
- Page 18 11-3-3. Self-diagnosis <PAC-YT52CRA> Retrieve the error history of each unit using the Simple MA controller. Switch to the self-diagnosis mode. button are pressed for 5 seconds or longer, the figure shown below is When the A button and the displayed. Set the address or refrigerant address No.
- Page 19 11-3-4. Remote Controller Check <PAC-YT52CRA> When the air conditioner cannot be controlled from the Simple MA controller, use this function to check the remote controller. 1 First, check the power mark. When normal voltage (DC12V) is not applied to the remote controller, the power mark goes off. When the power mark is off, check the remote controller wiring and the indoor unit.
- Page 20 11-3-5. Self-diagnosis <Wireless remote controller> <In case of trouble during operation> When a malfunction occurs to air conditioner, both indoor unit and outdoor unit will stop and operation lamp blinks to inform unusual stop. < Malfunction-diagnosis method at maintenance service> [Procedure] 1.
- Page 21 • Refer to the following tables for details on the check codes. [Output pattern A] Beeper sounds Beep Beep Beep Beep Beep Beep Beep OPERATION · · · Repeated INDICATOR lamp flash pattern Approx. 2.5 sec. 0.5 sec. 0.5 sec. 0.5 sec.
- Page 22 11-4. TROUBLE CRITERION OF MAIN PARTS SUZ-SA71VA.TH Parts name Check method and criterion Figure Defrost thermistor (RT61) Fin temperature Measure the resistance with a tester. thermistor (RT64) Ambient temperature Refer to “11-6. Test point diagram and voltage” for the chart of thermistor. thermistor (RT65) Outdoor heat exchanger temperature thermistor(RT68)
- Page 23 11-5. TROUBLESHOOTING FLOW A How to check inverter/compressor Disconnect the connector between the compressor and the intelligent power module (SA71: IPM) Check the voltage between terminals. See 11-5. “Check of open phase”. Are the voltages balanced? Replace the inverter P.C. board. Check the compressor.
- Page 24 D Check of compressor winding Disconnect the connector between the compressor and intelligent power module, and measure the resistance between the compressor terminals. <<Measurement point>> at 3 points BLK-WHT Measure the resistance between the lead wires at 3 points. BLK-RED WHT-RED <<Judgement>>...
- Page 25 G Check of R.V. coil First of all, measure the resistance of R.V. coil to check if the coil is defective. Refer to 11-4. In case CN602 (SA71) is not connected or R.V. coil is open, voltage is generated between the terminal pins of the connector although any signal is not being transmitted to R.V.
- Page 26 I Check of LEV Start Turn on power supply to the outdoor unit after checking Normal LEV coil is fixed to the LEV body securely. Is "click - click" sound heard? Or, do you feel vibration of the LEV coil with a hand? Disconnect the connector CN724 is there nor- Replace the inverter P.C.
- Page 27 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 28 11-6. TEST POINT DIAGRAM AND VOLTAGE Inverter P.C. board SUZ-SA71VA.TH Fuse (F62) Fuse (F601) R.V. coil (CN602) T2.0AL250V T3.15AL250V 230VAC Jumper wire for changing defrost setting (JS) Jumper wire for pre-heat control setting (JK) Signal of out- Defrost thermistor door fan motor /RT61 (CN671) (CN931) Discharge temperature...
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Page 29: 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 two 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 30 OPERATING PROCEDURE PHOTOS 2. Removing the inverter assembly, inverter P.C. board Photo 3 Screw of the (1) Remove the cabinet and panels. (Refer to procedure 1.) relay panel (2) Disconnect the lead wire to the reactor and the following con- Screws of the nectors: PB support...
- Page 31 OPERATING PROCEDURE PHOTOS 4. Removing the discharge temperature thermistor, Photo 5 defrost thermistor, outdoor heat exchanger tempera- Outdoor heat Ambient tem- exchanger tempera- perature ture thermistor and ambient temperature thermistor ture thermistor thermistor (1) Remove the cabinet and panels. (Refer to procedure 1.) (2) Disconnect the lead wire to the reactor and the following connectors: <Inverter P.C.
- Page 32 HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO100-8310, JAPAN Copyright 2014 MITSUBISHI ELECTRIC CORPORATION New publication, effective May 2014 Distributed in May 2014 No.OCH561 Specifications are subject to change without notice. Made in Japan...