Chapter 5 Control - Mitsubishi Electric PURY-M200YNW-A1 Service Handbook

Chapter 5 Control
5-1 Dipswitch Functions and Factory Settings ........................................................................................ 1
5-1-1 Outdoor Unit Switch Functions and Factory Settings ............................................................................. 1
5-1-2 Indoor Unit Switch Functions and Factory Settings ................................................................................ 6
5-1-3 Remote Controller Switch Functions and Factory Settings..................................................................... 7
5-1-4 Switch Functions <HBC> ........................................................................................................................ 9
5-2 Outdoor Unit Control .......................................................................................................................... 11
5-2-1 Overview ............................................................................................................................................... 11
5-2-2 Initial Control ......................................................................................................................................... 11
5-2-3 Startup Control...................................................................................................................................... 11
5-2-4 Refrigerant Bypass Control................................................................................................................... 12
5-2-5 Frequency Control ................................................................................................................................ 13
5-2-6 Defrost Operation Control ..................................................................................................................... 14
5-2-7 Refrigerant Recovery Control ............................................................................................................... 17
5-2-8 Outdoor Unit Fan Control...................................................................................................................... 18
5-2-9 Expansion valve control (LEV2a, LEV2b, LEV2c, and LEV2d)............................................................. 19
5-2-10 Control of Controller Cooling Function (Electronic Expansion Valve <LEV9>)..................................... 19
5-2-11 Injection Control (Linear Expansion Valve <LEV4>)............................................................................. 19
5-2-12 Control at Initial Startup ........................................................................................................................ 19
5-2-13 Operation Mode .................................................................................................................................... 20
5-2-14 Demand Control.................................................................................................................................... 21
5-2-15 Control of IH energization without the compressor in operation ........................................................... 21
5-3 HBC Control ........................................................................................................................................ 22
5-3-1 Water Pump Control ............................................................................................................................. 22
5-3-2 4-Way Valve Control ............................................................................................................................. 23
5-3-3 Valve Block (VB3) Water Flow Rate Adjustment .................................................................................. 24
5-3-4 Valve Block (VB3) Water Flow Path Switching Control ........................................................................ 25
5-3-5 Bypass Control...................................................................................................................................... 26
5-3-6 Plate Heat Exchanger Control .............................................................................................................. 26
5-3-7 Defrost Operation Control ..................................................................................................................... 27
5-3-8 Refrigerant Recovery Control ............................................................................................................... 31
5-3-9 Backup Control ..................................................................................................................................... 31
5-3-10 Water Pump Protection Control ............................................................................................................ 32
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