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

Table of Contents

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 <Hydro Unit>............................................................................................................... 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 ................................................................................................................................ 14

5-2-6

Defrost Operation Control ..................................................................................................................... 15

5-2-7

Continuous heating mode control ......................................................................................................... 18

5-2-8

Refrigerant Recovery Control ............................................................................................................... 19

5-2-9

Outdoor Unit Fan Control...................................................................................................................... 19

5-2-10 Subcool Coil Control (Linear Expansion Valve <LEV1>) ...................................................................... 19

5-2-11 Refrigerant Flow Control (Linear Expansion Valves <LEV2a, LEV2b, and LEV2c>)............................ 19

5-2-12 Control of Controller Cooling Function (Electronic Expansion Valve <LEV9>)..................................... 19

5-2-13 Injection Control (Linear Expansion Valve <LEV4>)............................................................................. 20

5-2-14 Control at Initial Startup ........................................................................................................................ 20

5-2-15 Operation Mode .................................................................................................................................... 20

5-2-16 Demand Control.................................................................................................................................... 21

5-2-17 Control of IH energization without the compressor in operation ........................................................... 21

5-3

Hydro Unit Control.............................................................................................................................. 22

5-3-1

Water Pump Control ............................................................................................................................. 22

5-3-2

Bypass Control...................................................................................................................................... 23

5-3-3

Plate Heat Exchanger Control .............................................................................................................. 23

5-3-4

Defrost Operation Control ..................................................................................................................... 24

5-3-5

Refrigerant Recovery Control ............................................................................................................... 27

5-3-6

Backup Control ..................................................................................................................................... 27

5-3-7

Water Pump Protection Control ............................................................................................................ 27

GB_BS_05_E

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