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EHST20C-VM6SB.UK
Mitsubishi Electric EHST20C-VM6SB.UK Manuals
Manuals and User Guides for Mitsubishi Electric EHST20C-VM6SB.UK. We have
1
Mitsubishi Electric EHST20C-VM6SB.UK manual available for free PDF download: Service Manual
Mitsubishi Electric EHST20C-VM6SB.UK Service Manual (91 pages)
CYLINDER UNIT
Brand:
Mitsubishi Electric
| Category:
Heat Pump
| Size: 11.94 MB
Table of Contents
Table of Contents
1
Service Manual
1
Reference Manual
2
Safety Precaution
3
Additional Refrigerant Charge
5
Cautions for Service
5
Service Tools
5
Specifications
6
Part Names and Functions
7
Outlines and Dimensions
10
Service Access Diagrams
10
Wiring Diagram
11
Automatic Switch to Backup Heat Source Operation
23
Dip Switch Setting
23
Field Wiring
24
Water System Diagram
28
Draining the Cylinder Unit
32
Filling the Cylinder Unit (Potable/Dhw Circuit)
32
Filling the Cylinder Unit (Primary Circuit)
32
Controls
33
Main Controller Menu Tree
34
Manual Operation
36
Service Menu
36
Auxiliary Settings
37
Function Settings
37
Thermistor Adjustment
37
Electric Heater (DHW)
38
Electric Heater (Heating)
38
Mixing Valve Control
38
Pump Speed
38
Freeze Stat Function
39
Heat Source Setting
39
Operation Settings
39
Simultaneous Operation
39
Cold Weather Function
40
Room Temp Control (Heating)
40
Demand Control (IN4)
41
External Input Settings
41
Floor Dry up Function
41
Outdoor Thermostat (IN5)
41
Error History
42
Running Information
42
Summary of Settings
42
Thermistor Reading
42
Manual Reset
43
Password Protection
43
Resetting the Password
43
SD Card
44
Indoor Unit Switch Setting Display
46
Output Signal Display
48
Mixing Valve State
50
Input Signal Display
51
Emergency Operation (Boiler)
52
Emergency Operation (Heater)
52
Malfunction Diagnosis Method by Main Controller
53
Test Run
53
Troubleshooting
53
Self Diagnosis and Action
54
Troubleshooting by Inferior Phenomena
60
Checking Component Parts' Function
65
Test Point Diagram
68
Disassembly Procedure
69
How to Remove the Front Panel
69
How to Remove the Main Controller
69
How to Remove the Electrical Parts
70
How to Remove the Control Box
71
How to Remove Water Pump/ Pump Valve
72
How to Remove the 3-WAY VALVE / 3-WAY VALVE MOTOR
73
How to Remove the Flow Switch
74
How to Remove the Booster Heater
75
How to Remove the Thermostat/Immersion Heater
76
How to Remove the Plate Heat Exchanger
77
How to Remove the Strainer
78
How to Remove the Pressure Relief Valve/Manometer/ Air Vent
79
How to Remove the Air Vent (Manual)
80
How to Remove the Expansion Vessel
80
How to Remove the Temperature and Pressure Relief Valve
80
How to Remove the Drain Cock (Primary Circuit)
81
How to Remove the Drain Cock (Sanitary Circuit)
81
How to Remove the Flexible Hose
81
Remove the Liquid Refrigerant Temp. Thermistor/ Flow Water Temp.
82
How to Remove the Back Panel
83
How to Remove the Side Panels
83
Notes on Replacing the Parts
84
Back-Up Operation of Boiler
85
Supplementary Information
85
Engineers Forms
86
Service and Maintenance
86
Annual Maintenance Log Book
88
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