Chapter 5 Control - Mitsubishi Electric HP120TNU-A Service Handbook

R410a

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 ................................................................................ 7

5-1-3

Remote Controller Switch Functions and Factory Settings..................................................................... 8

5-1-4

BC Controller Switch Settings............................................................................................................... 10

5-2

Outdoor Unit Control .......................................................................................................................... 11

5-2-1

Overview ............................................................................................................................................... 11

5-2-2

Rotation Control .................................................................................................................................... 11

5-2-3

Initial Control ......................................................................................................................................... 11

5-2-4

Startup Control...................................................................................................................................... 12

5-2-5

Refrigerant Bypass Control................................................................................................................... 12

5-2-6

Frequency Control ................................................................................................................................ 13

5-2-7

Defrost Operation Control ..................................................................................................................... 14

5-2-8

Continuous heating mode control ......................................................................................................... 17

5-2-9

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

5-2-10 Outdoor Unit Fan Control...................................................................................................................... 19

5-2-11 Expansion valve control (LEV2a, LEV2b, and LEV2d) ......................................................................... 20

5-2-12 Control of Controller Cooling Function (Electronic Expansion Valve <LEV9>)..................................... 20

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

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

5-2-15 Emergency Operation Mode ................................................................................................................. 22

5-2-16 Operation Mode .................................................................................................................................... 24

5-2-17 Demand Control.................................................................................................................................... 25

5-2-18 Control of IH energization without the compressor in operation ........................................................... 25

5-3

BC Controller Control......................................................................................................................... 26

HWE18220_GB

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