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

Table of Contents

Table Of Contents1
Reference Manual2
Safety Precaution3
Warning3
Using R410A Refrigerant Heat Pumps4
Tools (For R410A)4
Cautions For Service5
Additional Refrigerant Charge5
Service Tools5
Specifications6
Part Names And Functions7
Outlines And Dimensions8
Technical Drawings8
Service Access Diagrams9
Wiring Diagram10
Signal Inputs10
Outputs10
Dip Switch Setting15
Automatic Switch To Heat Source Only Operation15
Applicable Error Codes15
Field Wiring16
Hydrobox Powered Via Outdoor Unit16
Electrical Connections 1 Phase16
Electrical Connections 3 Phase16
Hydrobox Powered By Independent Source17
1 Phase17
3 Phase17
Water System Diagram18
Local System19
1-Zone Temperature Control19
2-Zone Temperature Control19
1-Zone Temperature Control With Boiler19
Filling The System (Primary Circuit)20
Draining The Hydrobox20
Controls21
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
Service Menu25
Manual Operation25
Function Settings25
Thermistor Adjustment26
Auxiliary Settings26
Economy Settings For Pump26
Electric Heater (Heating)26
Mixing Valve Control27
Flow Sensor27
Heat Source Setting27
Pump Speed27
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
Manual Reset32
Resetting The Password32
Sd Card32
Indoor Unit Switch Setting Display (Request Code: 162 To 166)34
Output Signal Display (Request Code: 175/553)36
Indoor Unit Only Operation40
Heater40
Boiler40
Emergency Operation40
Troubleshooting41
Test Run41
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
Defrosting46
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
Thermistors55
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
Contactor59
Terminal Block59
How To Swing The Control Box To The Front60
How To Remove Water Pump/ Pump Valve61
Water Pump61
Pump Valve61
Ehpx Series62
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
Manometer73
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