WH-MXC16G9E8 — Panasonic Air Conditioner Service Manual (repair manual). Page 2

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TABLE OF CONTENTS 
1.
 
Safety Precautions ............................................. 3
 
2.
 
Specifications ..................................................... 5
 
3.
 
Features ............................................................... 7
 
4.
 
Location of Controls and Components ............ 8
 
4.1
 
Mono Bloc Unit ............................................. 8
 
5.
 
Dimensions ....................................................... 18
 
5.1
 
Mono Bloc Unit ........................................... 18
 
6.
 
Refrigeration And Water Cycle Diagram ........ 19
 
7.
 
Block Diagram .................................................. 21
 
8.
 
Wiring Connection Diagram ............................ 22
 
9.
 
Electronic Circuit Diagram .............................. 24
 
10.
 
Printed Circuit Board ....................................... 26
 
10.1
 
Water System ............................................. 26
 
10.2
 
Refrigerant System ..................................... 28
 
11.
 
Installation Instruction ..................................... 30
 
11.1
 
Select The Best Location ........................... 32
 
11.2
 
Mono Bloc Unit Installation ......................... 32
 
11.3
 
Piping Installation ....................................... 33
 
11.4
 
Connect The Cord And Cable To Mono Bloc 
 
Unit ............................................................. 34
 
11.5
 
Checking and Test Run Procedures .......... 40
 
12.
 
Operation and Control ..................................... 41
 
12.1
 
Basic Function ............................................ 41
 
12.2
 
Water Pump ................................................ 61
 
12.3
 
Pump Down Operation [Service Mode: 01] 63
 
12.4
 
Flow Switch ................................................ 63
 
12.5
 
Indoor Unit Safety ....................................... 64
 
12.6
 
Auto Restart Control ................................... 64
 
12.7
 
Indication Panel .......................................... 64
 
12.8
 
Indoor Back-Up Heater Control .................. 65
 
12.9
 
Tank Booster Heater Control ...................... 66
 
12.10
 
Base Pan Heater Control (Optional) ........... 66
 
12.11
 
Sterilization Mode ....................................... 67
 
12.12
 
Quiet Operation .......................................... 67
 
12.13
 
Anti Freeze Control..................................... 68
 
12.14
 
Solar Operation (Optional) ......................... 69
 
12.15
 
External Room Thermostat Control 
 
(Optional) .................................................... 73
 
12.16
 
Three Ways Valve Control ......................... 74
 
12.17
 
Two Ways Valve Control ............................ 74
 
12.18
 
External OFF/ON Control ........................... 75
 
12.19
 
Holiday Mode .............................................. 76
 
12.20
 
Dry Concrete Function ............................... 76
 
13.
 
Protection Control ............................................ 77
 
13.1
 
Protection Control for All Operations .......... 77
 
13.2
 
Heat Exchanger (HEX) Protection Control . 79
 
13.3
 
Protection Control for Heating Operation ... 80
 
13.4
 
Protection Control for Cooling Operation ... 82
 
14.
 
Servicing Mode ................................................. 83
 
14.1
 
Remove The Cabinet Front Plate ............... 83
 
14.2
 
Remove The Cabinet Top Plate ................. 83
 
14.3
 
Test Run .....................................................83
 
14.4
 
Proper Pump Down Procedure ..................84
 
14.5
 
How To Adjust Water Flow Rate ................84
 
14.6
 
Expansion Vessel Pre Pressure Checking .84
 
14.7
 
How to Unlock Cool Mode ..........................85
 
14.8
 
Dry Concrete [SERVICE MODE: 03] ..........85
 
14.9
 
EEPROM Factory Default Data Setup 
 
Procedure ...................................................85
 
15.
 
Maintenance Guide...........................................86
 
16.
 
Troubleshooting Guide ....................................88
 
16.1
 
Refrigeration Cycle System ........................88
 
16.2
 
Relationship Between The Condition Of The 
 
Mono Bloc Unit And Pressure And Electric 
 
Current ........................................................89
 
16.3
 
Breakdown Self Diagnosis Function ...........90
 
16.4
 
Error Codes Table ......................................91
 
16.5
 
Self-diagnosis Method ................................93
 
17.
 
Disassembly and Assembly Instructions ... 130
 
17.1
 
To Remove The Cabinet Front Plate ....... 130
 
17.2
 
To Remove The Cabinet Top Plate ......... 130
 
17.3
 
To Remove The Cabinet Rear Plate ....... 131
 
17.4
 
To Remove Pressure Gauge ................... 131
 
17.5
 
To Remove RCCB ................................... 131
 
17.6
 
To Remove Transformer and Electronic 
 
Controller Board ...................................... 132
 
17.7
 
To Remove Pressure Relief Valve, Flow 
 
Switch and Air Purge Valve ..................... 133
 
17.8
 
To Remove Water Pump ......................... 134
 
17.9
 
To Remove Bottle Complete ................... 135
 
18.
 
Technical Data ............................................... 136
 
18.1
 
Operation Characteristics ........................ 136
 
18.2
 
Heating Capacity Table ........................... 139
 
18.3
 
Cooling Capacity Table ........................... 139
 
19.
 
Exploded View and Replacement Parts List 140
 
19.1
 
(Refrigerant System) ............................... 140
 
19.2
 
(Water System) ........................................ 145
 
 
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