Mitsubishi Electronics Mitsubishi Digital Electronics Air Conditioner MS-AWA User Manual

Browse online or download User Manual for Split-system air conditioners Mitsubishi Electronics Mitsubishi Digital Electronics Air Conditioner MS-AWA. Mitsubishi Electronics Mitsubishi Digital Electronics Air Conditioner MS-AWA User's Manual

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MS-A•WA
· MU-A•WA
MSZ-A•NA
· MUZ-A•NA
· MUZ-A•NA -
U
MSY-A•NA · MUY-A•NA
MSZ-FD•NA
· MUZ-FD•NA
· MUZ-FD•NA -
U
MSZ-D•NA
· MUZ-D•NA
· MUZ-D•NA -
U
MSY-D•NA
· MUY-D•NA
· MXZ-A•NA
SERVICE TECHNICAL GUIDE
CONTENTS
1. MS MICROPROCESSOR CONTROL ··················4
2. MSZ, MSY MICROPROCESSOR CONTROL ······7
3. MXZ MICROPROCESSOR CONTROL ··············21
Wireless type Models
Inverter-controlled multi system type Models
No. OBT16
REVISED EDITION-B
Please void OBT16 REVISED EDITION-A.
Revision B:
MXZ-2A20NA-
1
, MXZ-4A36NA, MSZ-FD,
MSZ-D and MSY-D have been added.
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1 2 3 4 5 6 ... 31 32

Summary of Contents

Page 1 - SERVICE TECHNICAL GUIDE

MS-A•WA · MU-A•WAMSZ-A•NA · MUZ-A•NA · MUZ-A•NA -UMSY-A•NA · MUY-A•NAMSZ-FD•NA · MUZ-FD•NA · MUZ-FD•NA -UMSZ-D•NA · MUZ-D•NA · MUZ-D•NA -U

Page 2 - Revision B:

set positionset speedset positionset speedIndoor fanCompressor normalOutdoor fanR.V. coil (21S4)OFF (COOL)OFFMaximum frequencyhorizontalHorizontal van

Page 3 - Outdoor unit models

11(2) Mode changeIn case of the following conditions, the operation mode is changed. COOL mode changes to HEAT mode when 15 minutes have passed with t

Page 4 - MS MICROPROCESSOR CONTROL

12<SWING operation>In swing operation of ECONO COOL operation mode, the initial air flow direction is adjusted to “Horizontal”.According to the

Page 5 - -1.3 °F

13MUZ-A24MUY-A24MUZ-DMUY-DPOWERSUPPLYNOISEFILTERCIRCUITRESISTORRELAYSMOOTHINGCAPACITORCURRENTTRANSFORMERCOMPRESSORREACTORPWVUNIPMPFCUWMS3~V+Function o

Page 6 - 1-3. AUTO VANE OPERATION

Input current waveform without PAM Input current waveform with PAMDue to the time of no electricity; · Power factor gets worse. · Harmonic gets increa

Page 7 - MSZ-D•NA MUZ-D•NA

15 4. Intelligent power module IPM consists of the following components · IGBT (x6) : Converts DC waveform to three-phase A

Page 8 - ) OPERATION (MSZ)

162-7-3. Sine wave controlIn these air conditioners, compressor equips brushless DC motor which doesn't have Hall element.In short, the motor is

Page 9

172-8. OPERATIONAL FREQUENCY CONTROL OF OUTDOOR UNIT1. OutlineThe operational frequency is as following:First, the target operational frequency is set

Page 10

182-9. EXPANSION VALVE CONTROL (LEV CONTROL) (1) Outline of LEV controlThe LEV basic control is comprised of setting LEV opening degree to the standar

Page 11 - 2-6. AUTO VANE OPERATION

19(2) Time chartOFF TimeTimeONOperational frequency of the compressorCommandedto openStandardopening degreeOpening degree is corrected accordingto dis

Page 12 - SWITCHING POWER TRANSISTOR

2Revision A:• MXZ-3A30NA-1 has been added.Revision B:• MXZ-2A20NA-1, MXZ-4A36NA, MSZ-FD, MSZ-D and MSY-D have been added.

Page 13

20(b) Reference value of LEV standard opening degree (pulse)Applied model A B C D E FMUZ-A09/12COOL 130 190 240 260 260 260HEAT 100 130 170 210 230 23

Page 14

21MXZ MICROPROCESSOR CONTROL33-1. INVERTER SYSTEM CONTROLMXZ-A•NAPOWERSUPPLYNOISEFILTERCIRCUITRESISTORRELAYSMOOTHINGCAPACITORCURRENTTRANSFORMERCOMPRES

Page 15

223. Power factor improvementBooster coil reactor and PFC rectify AC to DC and control its voltage.In the motor drive system of sine wave control, pow

Page 16

233-2. EXPANSION VALVE CONTROL (LEV CONTROL)Linear expansion valve (LEV) is controlled by “Thermostat ON” commands given from each unit.Indoor unit st

Page 17

24In COOL mode, the two indoor coil thermistors (one main and one sub) sense temperature ununiformity (super heat) at the heat exchanger, and when tem

Page 18

2523 54 69 84 100 115 131 1463814 32 41 50 59 68 77 86MXZ-2AMXZ-3A/4A23Compressor operating frequency (Hz)4Hz01020304050607080910LEV Opening (code)De

Page 19

26MXZ-3A30NA-1 MXZ-4A36NAExclusive LEVStandard opening (pulse) LEV Opening (code) 12345678910COOL 126 130 134 138 150 160 170 180 190 200HEAT 248 2

Page 20

27(1) LEV opening correction by discharge temperatureThe target discharge temperature is determined according to frequency zone and number of operatio

Page 21 - MXZ MICROPROCESSOR CONTROL

28 Correct the LEV opening according to the difference between target discharge temperature and discharge temperature.(2) Separate correction (C

Page 22

293-3. OPERATIONAL FREQUENCY RANGE b) Correct the LEV separately by temperature difference “ ∆RT” between main/sub indoor coil thermistor.∆RTLEV op

Page 23

1. MS MICROPROCESSOR CONTROL ···························································4Indoor unit models Outdoor unit modelsMS-A09WA MU-A09WA MS-A1

Page 24

303-6. OUTDOOR FAN CONTROLFan speed is switched according to the number of operating indoor unit and the compressor frequency.3-5. DISCHARGE TEMPERATU

Page 25 - MXZ-3A30NA

311. Pre-heat control is turned ON for 15 or 30 min, after the breaker is turned ON.2. 30 min. after the unit is stopped, pre-heat control is turned

Page 26

New publication, effective Feb. 2008Specifications subject to change without notice. Copyright 2006 MITSUBISHI ELECTRIC ENGINEERING CO.,LTDDistributed

Page 27

4MS MICROPROCESSOR CONTROL11-1. COOL ( ) OPERATIONMS-A•WA MU-A•WA 2. Indoor fan speed controlIndoor fan operates continuously at the set speed by FA

Page 28

51. Thermostat control Thermostat is ON or OFF by difference between room temperature and set temperature.2. Indoor fan speed controlIndoor fan o

Page 29

61-3. AUTO VANE OPERATION1. Horizontal vane<SWING operation>In swing operation of ECONO COOL operation mode, the initial air flow direction is a

Page 30 - 3-4. HEAT DEFROSTING CONTROL

7MSZ,MSY MICROPROCESSOR CONTROL22-1. COOL ( ) OPERATION2. Indoor fan speed controlIndoor fan operates continuously at the set speed by FAN SPEED CON

Page 31 - 3-8. COOL OPERATION

8Set temperature is as shown on the right chart.The system for dry operation uses the same refrigerant circuit as the cooling circuit.The compressor a

Page 32 - 3-10. HEAT OPERATION

9(2) Cold air prevention controlMSZ-A09/12/15/17 MSZ-FD MSZ-D When the compressor is not operating,( ) if the temperature of room temperature ther

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