Mitsubishi Electric ecodan EHST30D-TM9ED Manuals

Table of Contents

• 1

  Contents
• 3

  Outdoor Unit's Service Manual
• 4

  Safety Precaution
• 4

  Meanings of Symbols Displayed on the Unit
• 5

  Cautions for Service
• 5

  Additional Refrigerant Charge
• 5

  Service Tools
• 5

  Electronic Weighing Scale
• 6

  Specifications
• 9

  Part Names and Functions
• 11

  Outlines and Dimensions
• 11

  Technical Drawings
• 12

  Service Access Diagrams
• 13

  Wiring Diagram
• 18

  DIP Switch Functions
• 19

  Field Wiring
• 19

  Cylinder Unit Powered Via Outdoor Unit
• 19

  Electrical Connections 1 Phase
• 20

  3 Phase
• 20

  Electrical Connections 3 Phase
• 21

  Option 2: Cylinder Unit Powered by Independent Source
• 23

  Water System Diagram
• 25

  Local System
• 25

  1-Zone Temperature Control
• 25

  2-Zone Temperature Control
• 25

  1-Zone Temperature Control with Boiler
• 26

  Filling the Cylinder Unit (Primary Circuit)
• 26

  Filling the Cylinder Unit (Potable/Dhw Circuit)
• 26

  Draining the Cylinder Unit
• 27

  Controls
• 27

  Main Remote Controller
• 27

  Main Remote Controller Parts
• 27

  Main Screen Icons
• 28

  Setting the Main Remote Controller
• 28

  Main Settings Menu
• 28

  General Operation
• 29

  Main Remote Controller Menu Tree
• 32

  Service Menu
• 32

  Manual Operation
• 32

  Function Settings
• 33

  Thermistor Adjustment
• 33

  Auxiliary Settings
• 33

  Economy Settings for Pump
• 33

  Electric Heater (Heating)
• 34

  Mixing Valve Control
• 34

  Flow Sensor
• 34

  Heat Source Setting
• 34

  Pump Speed
• 35

  Operation Settings
• 35

  Heating Operation
• 35

  Freeze Stat Function
• 35

  Simultaneous Operation
• 36

  Energy Monitor Settings
• 36

  General Description
• 36

  Calculation Internally
• 36

  Actual Measurement by External Meter
• 37

  Settings Using the Main Remote Controller
• 37

  External Input Settings
• 37

  Demand Control (IN4)
• 37

  Outdoor Thermostat (IN5)
• 38

  Summary of Settings
• 38

  Error History
• 38

  Password Protection
• 38

  Resetting the Password
• 39

  Manual Reset
• 39

  SD Card
• 41

  Indoor Unit Switch Setting Display
• 43

  Output Signal Display
• 47

  Indoor Unit Only Operation
• 47

  Emergency Operation
• 48

  Troubleshooting
• 48

  Test Run
• 48

  Malfunction Diagnosis Method by Main Remote Controller
• 49

  Self Diagnosis and Action
• 49

  Circulation Water Temperature Overheat Protection
• 49

  Tank Water Temperature Overheat Protection
• 50

  Indoor Unit Temperature Thermistor Failure
• 50

  Circulation Water Freeze Protection
• 51

  Heating Operation Error
• 51

  Low Primary Circuit Flow Rate Detected by Flow Sensor
• 51

  Low Primary Circuitflow Rate Detected by Flow Switch
• 52

  Pressure Sensor Failure
• 52

  High Pressure Protection
• 52

  Boiler Operation Error
• 52

  Flow Sensor Failure
• 53

  Defrosting
• 53

  Main Remote Controller Communication Failure
• 53

  Indoor/Outdoor Communication Failure
• 54

  Indoor Unit/Wireless Receiver Communication Failure
• 54

  Wireless Remote Controller/Wireless Receiver Communication Failure
• 55

  Troubleshooting by Inferior Phenomena
• 61

  Checking Component Parts' Function
• 61

  Water Circulation Pump (Primary Circuit)
• 61

  Recommended Water Flow Rate Range
• 61

  Water Circulation Pump (Primary Circuit) Characteristics
• 62

  Booster Heater
• 62

  Earth Leakage Circuit Breaker for Heater
• 62

  Relay for Heater
• 62

  3-Way Valve
• 63

  Pressure Sensor
• 63

  Thermistors
• 63

  Thermistor Characteristics Charts
• 64

  Test Point Diagram
• 64

  FTC (Controller Board)
• 65

  Disassembly Procedure
• 65

  Preparation for the Repair Service
• 65

  How to Remove the Front Panel
• 65

  How to Remove the Remocon Assy
• 66

  How to Remove the Electrical Parts
• 66

  Contactor
• 66

  Terminal Block
• 66

  Controller Board
• 67

  How to Remove the Control Box
• 68

  How to Remove Water Pump (Primary Circuit)/Pump Valve/Strainer Valve
• 68

  Water Pump
• 68

  Pump Valve
• 69

  Strainer Valve
• 69

  Strainer Cover (Debris Recovery)
• 69

  How to Remove the 3-WAY VALVE/3-WAY VALVE MOTOR
• 70

  How to Remove the Flow Sensor
• 70

  How to Remove the Booster Heater
• 72

  How to Remove the Thermostat/Immersion Heater
• 72

  Immersion Heater
• 73

  How to Remove the Plate Heat Exchanger
• 74

  How to Remove the Plate Heat Exchanger (P-HEX)
• 74

  How to Remove the Pressure Sensor
• 75

  How to Remove the Pressure Relief Valve/Manometer/Air Vent (Automatic)
• 75

  Manometer
• 76

  Pressure Relief Valve (3 Bar)
• 76

  Air Vent (Automatic)
• 76

  Pressure Relief Valve (10 Bar)
• 77

  How to Remove the Expansion Vessel
• 77

  How to Remove the Temperature and Pressure (T&P) Relief Valve
• 77

  How to Remove the Air Vent (Manual)
• 78

  How to Remove the Drain Cock (Primary Circuit)
• 78

  How to Remove the Drain Cock (Sanitary Circuit)
• 80

  How to Remove the Scale Trap (Sanitary Circuit)
• 81

  How to Remove the Liquid Refrigerant Temp. Thermistor
• 82

  How to Remove the Side Panels
• 82

  V/M Plate
• 82

  How to Remove the Drain Pan
• 83

  How to Remove the Back Panel
• 84

  How to Detach and Attach the Quick Connection
• 85

  Notes on Replacing the Parts
• 86

  Supplementary Information
• 86

  Back-Up Operation of Boiler
• 86

  Installation & System Set up
• 86

  Remote Controller Settings
• 87

  Service and Maintenance
• 87

  Engineers Forms
• 88

  Commissioning/Field Settings Record Sheet
• 90

  Annual Maintenance Log Book
• 90

  Parts Which Require Regular Replacement
• 90

  Parts Which Require Regular Inspection