Contents
4-5
Setting to Cool or Heat only mode, checking and Cool/Heat modes operation test ............................4-25
4-6 Fault Diagnosis by Symptom ............................................................................................4-27
4-6-1 Indoor.......................................................................................................................... 4-27
4-6-2 Outdoor unit is not powered on – Initial diagnosis .............................................4-31
4-6-3 Checking Outdoor Controller ................................................................................. 4-32
4-6-4 Outdoor unit fan error.............................................................................................. 4-33
4-6-5 Compressor startup error, Compressor lock error,
Compressor rotation error ...................................................................................... 4-34
4-6-6 IPM Over current error ............................................................................................. 4-35
4-6-7 Checking Temperature sensor ................................................................................ 4-36
4-7 PCB Inspection ................................................................................................................... 4-38
4-7-1 Cautions for Part Replacement ............................................................................... 4-38
4-7-2 Procedure ...................................................................................................................4-38
5. PCB Diagram ······························································································································· 5-1
5-1 Indoor unit .............................................................................................................................. 5-1
5-2 Outdoor PCB Diagram ......................................................................................................... 5-8
6. Wiring Diagram ·························································································································· 6-1
6-1 Indoor Unit ............................................................................................................................. 6-1
6-2 Outdoor unit ......................................................................................................................... 6-4
7. Preference Sheet ··························································································································7-1
7-1 Selecting Area for Installation ..............................................................................................7-1
7-1-1 Indoor Unit ..................................................................................................................... 7-1
7-1-2 Outdoor Unit ..................................................................................................................7-2
7-1-3 Remote Control Unit ....................................................................................................7-2
7-2 Connecting Up and Purging the Circuit .............................................................................. 7-3
7-3 Refrigerant Refill ................................................................................................................... 7-4
7-4 Refrigerant Adjustment ....................................................................................................... 7-5
7-5 Flare Nut Fixing Torque ........................................................................................................ 7-5
7-6 "Pump down" Procedure ......................................................................................................7-6
7-7 Index of Model Name ............................................................................................................ 7-7
7-8 Refrigerating Cycle Diagram ............................................................................................. 7-10
7-9 Pressure & Capacity mark .................................................................................................. 7-14
7-10 The abbreviated technology words & the definition of technology terms ................ 7-14
7-11 Q & A for Non-trouble ........................................................................................................ 7-15
7-12 Common sense of refrigeration ....................................................................................... 7-18
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