Mitsubishi Electronics MS-AWA manual Auto Change Over ··· Auto Mode Operation MSZ, Mode selection

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(2) Releasing conditions of defrosting

Defrosting is released when any of the following conditions is satisfied:

a)The defrost thermistor continues to read 50 °F or more (MUZ-A09/12MUZ-D) / 41 °F or more (MUZ-A15/17MUZ-FD) / 59 °F or more (MUZ-A24) for 30 seconds.

b)Defrosting time has exceeded 10 minutes.

c)Any other mode than HEAT mode is set during defrosting.

Time chart of defrosting in HEAT mode (reverse type)

<Indoor unit>

Horizontal vane

Indoor fan

set position

set speed

horizontal

horizontal (temperature of indoor coil thermistor < 102 °F)

Very Low (temperature of indoor coil thermistor > 64 °F)

OFF

set position

set speed

 

 

30

 

 

 

 

 

seconds

 

 

 

<Outdoor unit>

 

 

 

 

 

 

 

 

Maximum frequency

 

 

Compressor normal

 

 

 

 

 

 

 

OFF

 

 

OFF

 

40

30

 

40

30

 

seconds seconds

5 seconds

seconds

seconds

 

 

 

 

 

 

ON

 

 

 

 

Outdoor fan

 

 

 

 

 

 

 

 

OFF

 

 

R.V. coil

ON (HEAT)

 

 

 

 

 

OFF (COOL)

 

 

(21S4)

 

 

 

 

 

 

 

 

 

5seconds

ON

ON (HEAT)

2-4. AUTO CHANGE OVER ··· AUTO MODE OPERATION (MSZ)

Once desired temperature is set, unit operation is switched automatically between COOL and HEAT operation.

1.Mode selection

(1)Initial mode

At first indoor unit operates only indoor fan with outdoor unit OFF for 3 minutes to detect present room temperature. Following the conditions below, operation mode is selected.

If the room temperature thermistor reads more than set temperature, COOL mode is selected.

If the room temperature thermistor reads set temperature or less, HEAT mode is selected.

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Contents Contents Revised EDITION-BRevision a MS-A09WA MU-A09WA MS-A12WA MU-A12WA MXZ-2A20NA MXZ-3A30NA MXZ-4A36NAMS-AWA MU-AWA Cool OperationWhen the room temperature is under 73 F Operation time chart ExampleAuto Vane Operation Horizontal vaneMUZ-ANA MUY-ANA MUZ-FDNA MUY-DNA MUZ-DNA Low outside temperature operationMSZ-ANA MSY-ANA MSZ-FDNA MSY-DNA MSZ-DNA MSZ-A MSY-A MSZ-FD MSZ-D MSY-DHeat Operation MSZ Overload starting MSZ-A24Gradation of fan speed in initial DefrostingAuto Change Over ··· Auto Mode Operation MSZ Mode selectionMUZ-A MUY-A Outdoor FAN Motor ControlMUZ-FD MUZ-D MUY-D MUZ-FD Inverter System ControlFunction of main parts MUZ-A24 MUY-A24 MUZ-D MUY-D Purpose of PAM adoption Outline of simple partial switching methodAt normal operation Input current waveform without PAMElimination of electrical noise Intelligent power moduleCompressor Sine wave control Control Method of Rotation TimesMUZ-FD09 Operational Frequency Control of Outdoor UnitMUZ-FD12 Expansion Valve Control LEV Control Cool · DRY ModeHeat Mode Pulse MUZ-A09/12/15/17 MUY-A15/17MUY-A15/17 MUZ-A09/12MUZ-A15/17 MUZ-A24260 Inverter main power supply circuit MXZ-ANAProtects transistors from over current Opening before stop → 500 pulse in 15 minutes Cool Heat MXZ-2A20NA/3A30NAMXZ-2A20NA MXZ-3A30NAMXZ-2A20NA MXZ-3A30NAMXZ-3A30NA Exclusive LEV MXZ-2A20NA Exclusive LEVReceiver LEV MXZ-4A36NACool DRY Heat MXZ-2A MXZ-2A20NAMXZ-3A30NA MXZ-3A MXZ-4AOperational Frequency Range ∆RTOutdoor FAN Control Discharge Temperature Protection ControlHeat Defrosting Control MXZ-4APRE-HEAT Control MXZ-2A20NA- 1 MXZ-3A30NA MXZ-4A36NA High pressure protection DRY OperationHeat Operation Made in Japan
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MSZ-FDNA, MUZ-FDNA - U, MUZ-FDNA, MUZ-ANA - U, MUY-ANA specifications

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