Table Of Contents; Self-Diagnosis And Countermeasures Depending On The Check Code Displayed - Mitsubishi Electric CITY MULTI PUHY-P200YEM-A Service Handbook

Contents
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PRECAUTIONS FOR DEVICES THAT USE R407C REFRIGERANT ....
[1] Storage of Piping Material ................................................................. 4
[2] Piping Machining ............................................................................... 5
[3] Necessary Apparatus and Materials and Notes on Their Handling .. 6
[4] Brazing .............................................................................................. 7
[5] Airtightness Test ................................................................................ 8
[6] Vacuuming ........................................................................................ 8
[7] Charging of Refrigerant ..................................................................... 9
[8] Dryer ................................................................................................. 9
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COMPONENT OF EQUIPMENT ...........................................................
[1] Appearance of Components ........................................................... 10
[2] Refrigerant Circuit Diagram and Thermal Sensor ........................... 19
[3] Electrical Wiring Diagram ................................................................ 24
[4] Standard Operation Data ................................................................ 29
[5] Function of Dip SW and Rotary SW ................................................ 38
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TEST RUN .............................................................................................
[1] Before Test Run ..............................................................................
[2] Test Run Method .............................................................................
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GROUPING REGISTRATION OF INDOOR UNITS WITH REMOTE
CONTROLLER .......................................................................................
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CONTROL ..............................................................................................
[1] Control of Outdoor Unit ................................................................... 54
[2] Control of BC Controller .................................................................. 61
[3] Operation Flow Chart ...................................................................... 62
[4] List of Major Component Functions ................................................ 68
[5] Resistance of Temperature Sensor ................................................. 71
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REFRIGERANT AMOUNT ADJUSTMENT ............................................
[1] Refrigerant Amount and Operating Characteristics ........................ 72
[2] Adjustment and Judgement of Refrigerant Amount ........................ 72
[3] Refrigerant Volume Adjustment Mode Operation ........................... 75
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TROUBLESHOOTING ...........................................................................
[1] Principal Parts ................................................................................. 80
[2] BC Controller Disassembly Procedure ..........................................
[3] Self-diagnosis and Countermeasures Depending on the Check
Code Displayed .............................................................................. 1
[4] LED Monitor Display ..................................................................... 143
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PREPARATION, REPAIRS AND REFRIGERANT REFILLING WHEN
REPAIRING LEAKS .............................................................................
[1]
Location of leaks: Extension piping or indoor units (when cooling) 177
[2] Location of leaks: Outdoor unit (Cooling mode) ............................ 177
[3] Location of leaks: Extension piping or indoor units (Heating mode)
[4] Location of leaks: Outdoor unit (when heating) ............................ 179
ª CHECK THE COMPOSITION OF THE REFRIGERANT
(R407 unit only) ......................................................................................
- 1 -
3
10
43
43
47
48
54
72
80
115
18
177
178
180