Multi Zone Service Manual - General

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Only for training and service purposes
3. Control logic
1. Compressor ......................................................................................................................23
2. Step(frequency) control ...................................................................................................24
3. Reversing valve operaton................................................................................................25
4. Discharge pipe control.....................................................................................................26
5. Input Current Control .......................................................................................................27
6. Outdoor Fan Control ........................................................................................................28
7. Defrost Control .................................................................................................................29
8. LEV Control.......................................................................................................................30
9. Oil restoration operation..................................................................................................32
10. Compressor warm-up control logic..............................................................................32
11. Heat sink control.............................................................................................................33