Table Of Contents - Mitsubishi Electric EHSD-MEC.UK Service Manual

R410a hydrobox

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Service manual (98 pages)

Table Of Contents

Table of Contents

Table of Contents

Table Of Contents1

Reference Manual2

Safety Precaution3

Using R410A Refrigerant Heat Pumps4

Tools (For R410A)4

Cautions For Service5

Additional Refrigerant Charge5

Specifications6

Part Names And Functions7

Outlines And Dimensions8

Technical Drawings8

Service Access Diagrams9

Wiring Diagram10

Signal Inputs10

Dip Switch Setting15

Automatic Switch To Heat Source Only Operation15

Applicable Error Codes15

Hydrobox Powered Via Outdoor Unit16

Electrical Connections 1 Phase16

Electrical Connections 3 Phase16

Hydrobox Powered By Independent Source17

Water System Diagram18

1-Zone Temperature Control19

2-Zone Temperature Control19

1-Zone Temperature Control With Boiler19

Filling The System (Primary Circuit)20

Draining The Hydrobox20

Main Controller21

Main Controller Parts21

Main Screen Icons21

Setting The Main Controller22

Main Settings Menu22

User Level – Short Press22

Installer Level – Long Press22

General Operation22

Main Controller Menu Tree23

Manual Operation25

Function Settings25

Thermistor Adjustment26

Auxiliary Settings26

Economy Settings For Pump26

Electric Heater (Heating)26

Mixing Valve Control27

Heat Source Setting27

Operation Settings28

Heating Operation28

Freeze Stat Function28

Cold Weather Function28

Energy Monitor Settings29

General Description29

Calculation Internally29

Connectable Electric Energy Meter And Heat Meter29

External Input Settings30

Demand Control(In4)30

Outdoor Thermostat (In5)30

Running Information30

Summary Of Settings31

Error History31

Password Protection31

To Delete An Error History Item31

Resetting The Password32

Indoor Unit Switch Setting Display (Request Code: 162 To 166)34

Output Signal Display (Request Code: 175/553)36

Indoor Unit Only Operation40

Emergency Operation40

Troubleshooting41

Malfunction Diagnosis Method By Main Controller41

Self Diagnosis And Action42

Circulation Water Temperature Overheat Protection42

Tank Water Temperature Overheat Protection42

Indoor Unit Temperature Thermistor Failure43

Dhw/Heating/Cooling/Lp/Fs/Os43

Circulation Water Freeze Protection43

Heating Operation Error44

Low Primary Circuit Flow Rate Detected By Flow Sensor44

Boiler Operation Error45

Boiler Circulation Water Freeze Protection45

Dhw Operation Error (Type Of External Plate Hex)45

Indoor Unit Temperature Thermistor (Th2) Failure45

Main Controller Communication Failure46

Indoor/Outdoor Communication Failure46

Main Controller Control Board Failure47

Indoor Unit/Wireless Receiver Communication Failure47

Wireless Remote Controller/Wireless Receiver Communication Failure47

Troubleshooting By Inferior Phenomena48

Annual Maintenance52

Annual Maintenance Points52

Checking Component Parts' Function53

Recommended Water Flow Rate Range53

Water Circulation Pump Characteristics53

Earth Leakage Circuit Breaker For Heater54

Relay For Heater54

Booster Heater54

2 + 4Kw Heater (230V, 1 Phase)54

Thermistor Characteristics Charts56

Test Point Diagram57

Ftc (Controller Board)57

Disassembly Procedure58

Preparation For The Repair Service58

How To Remove The Front Panel58

How To Remove The Main Remote Controller58

How To Remove The Electrical Parts59

Earth Leakage Circuit Breaker59

Terminal Block59

How To Swing The Control Box To The Front60

How To Remove Water Pump/ Pump Valve61

How To Remove The Flow Sensor63

How To Remove The Booster Heater64

How To Remove The Plate Heat Exchanger66

How To Remove The Strainer71

Removal Of The Strainer Cover (Debris Recovery)71

How To Remove The Manometer / Pressure Relief Valve73

Pressure Relief Valve73

How To Remove The Expansion Vessel74

How To Remove The Drain Cock (Primary Circuit)74

How To Remove The Thermistor75

How To Remove The Drain Pan (Ers*Series)76

How To Detach And Attach The Quick Joint77

Notes On Replacing The Parts78

Pressure Relief Valve 3Bar78

Supplementary Information79

Back-Up Operation Of Boiler79

Installation & System Set Up79

Remote Controller Settings79

Service And Maintenance80

Engineers Forms80

Annual Maintenance Log Book82

Parts Which Require Regular Replacement82

Parts Which Require Regular Inspection82

Parts Which Must Not Be Reused When Servicing82

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Troubleshooting