User Manuals: Mitsubishi Electric MSZ-G20SV Conditioner

Manuals and User Guides for Mitsubishi Electric MSZ-G20SV Conditioner. We have 1 Mitsubishi Electric MSZ-G20SV Conditioner manual available for free PDF download: Service Manual

Mitsubishi Electric MSZ-G20SV Service Manual

Mitsubishi Electric MSZ-G20SV Service Manual (116 pages)

Wireless type SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

Brand: Mitsubishi Electric | Category: Air Conditioner | Size: 3.44 MB

Table of Contents

Table of Contents
1
Service Manual
1
Indoor Unit
2
Part Names and Functions
2
Technical Changes
2
- Accessories
  3
- Outdoor Unit
  3
- Remote Controller
  4
Specification
7
Indoor Unit
9
Noise Criteria Curves
11
Outlines and Dimensions
13
Wiring Diagram
17
Refrigerant System Diagram
21
Performance Curves
24
Microprocessor Control
35
- Wireless Remote Controller
  35
- Fuzzy Control
  36
- TEMPERATURE Buttons
  36
- Coil Frost Prevention
  37
- Cool Mode of “I FEEL CONTROL”
  37
- DRY Mode of “I FEEL CONTROL”
  37
- Cold Air Prevention Control
  38
- HEAT Mode of “I FEEL CONTROL”
  38
- Warm Air Control
  38
- Defrosting
  39
- High Pressure Protection
  39
- Overload Starting
  39
- Starting Conditions of Defrosting
  39
- Dry Operation
  40
- Fan Motor Control
  40
- Fan Motor Lock-Up Protection
  40
- Rotational Frequency Feedback Control
  40
- Dew Prevention
  41
- Positioning
  41
- Swing Mode
  41
- Vane Auto Mode
  41
- Econo Cool
  42
- How to Set the Timer
  42
- SWING Operation
  42
- Timer Operation
  42
- Emergency-Test Operation
  43
- Program Timer
  43
- During Increasing Frequency
  44
- Frequency Change Speed
  44
- Maximum/Minimum Frequency in each Operation Mode
  44
- Operational Frequency Control of Outdoor Unit
  44
- Expansion Valve Control
  45
- Outline of LEV Control
  45
- Air Conditioner on
  46
- Control Data
  46
- Outdoor Fan Motor Control
  46
- Time Chart
  46
- Indoor Fan Motor Control
  47
- Input Side
  47
- Output Side
  47
- R.V. Coil Control
  47
- Wireless Remote Controller
  48
- Indoor Fan Speed Control
  50
- Time Control
  50
- Defrosting Time Chart
  52
- Vane Motor Drive
  56
- Vertical Vane
  56
- Elimination of Electrical Noise
  58
- Main Power Supply Circuit
  58
- Outline Drawing of Main Power Supply
  58
- Power Factor Improvement of Power Supply
  58
- At the Cooling Operation
  60
- At the Heating Operation
  60
- How to Determine the Optimal Voltage
  60
- Optimal Voltage Control
  60
- LEV Control
  61
- Conditions to Enter Defrosting Mode
  62
- Discharge Temperature Protection Control
  62
- Heat Defrosting Control
  62
- Outdoor Fan Control
  62
- P.C. Board Modification for Individual Operation
  63
- Relation between Main Sensor and Actuator
  63
Service Functions
63
- Timer Short Mode
  63
- Auto Restart Function
  65
- How to Set “AUTO RESTART FUNCTION”
  65
- How to Replace Batteries
  66
Troubleshooting
66
Disassembly Instructions
97
- Terminal with Lock Mechanism
  97
- Removing the Electrical Box
  98
- Removing the Line Flow Fan and the Indoor Fan Motor
  98
- Removing the Vane Motor
  98
- Removing the Electronic Control P.C. Board, the Receiver
  99
- Removing the Front Panel
  99
- Removing the Cabinet
  101
- Removing the Inverter Assembly
  101
- Removing the Noise Filter P.C. Board
  101
- Removing the Relay P.C. Board
  101
- Removing the Compressor
  102
- Removing the Outdoor Fan Motor
  102
- Fin Temperature Thermistor
  104
- Removing the R.V. Coil
  104
- Remove the Compressor and 4-Way Valve
  105
- Indoor Unit Structural Parts
  106
Parts List
106
- Accessory and Remote Controller
  107
- Indoor Unit Functional Parts and Electrical Parts
  107
- Outdoor Unit Structural Parts and Functional Parts
  108
- Outdoor Unit Electrical Parts
  109
- Indoor Unit Heat Exchanger
  110
- Air Cleaning Filter
  114
- Deodorizing Filter
  114
- Drain Socket
  115
Optional Parts
115

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