Mitsubishi Electronics Mitsubishi Digital Electronics Air Conditioner MS-AWA Manuale Utente

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

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

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

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

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

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

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

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

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

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

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.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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