TABLE OF CONTENTS
1 SAFETY CONSIDERATIONS ......................................................................................................................................... 4
1.1 General.................................................................................................................................................................... 4
1.2 Before switching the unit ......................................................................................................................................... 4
1.3 Avoid electrocution .................................................................................................................................................. 4
2 ABOUT THIS DOCUMENT ............................................................................................................................................. 5
2.1 Contents .................................................................................................................................................................. 5
2.2 Revision history ....................................................................................................................................................... 5
2.3 Abbreviations used.................................................................................................................................................. 5
2.4 References .............................................................................................................................................................. 5
3 CONTROL SYSTEM DESCRIPTION ............................................................................................................................. 6
3.1 Architecture ............................................................................................................................................................. 6
3.2 Main components .................................................................................................................................................... 7
3.3 Components operating limits .................................................................................................................................. 8
4 USING THE CONTROLLER ........................................................................................................................................... 9
4.1 Mask tree............................................................................................................................................................... 10
4.2 Measure units ........................................................................................................................................................ 11
4.3 Default passwords................................................................................................................................................. 11
5 WORKING WITH THIS UNIT ........................................................................................................................................ 12
5.1 Controller purpose................................................................................................................................................. 12
5.2 Unit enabling ......................................................................................................................................................... 12
5.3 Unit modes ............................................................................................................................................................ 12
5.4 Setpoints management ......................................................................................................................................... 13
5.4.1 4-20mA setpoint override ............................................................................................................................. 13
5.4.2 OAT setpoint override................................................................................................................................... 13
5.4.3 Return setpoint override ............................................................................................................................... 14
5.5 Compressors capacity control ............................................................................................................................... 14
5.5.1 Automatic Control ......................................................................................................................................... 14
5.5.2 Manual Control ............................................................................................................................................. 16
5.6 Compressors timing .............................................................................................................................................. 19
5.7 Compressors protection ........................................................................................................................................ 19
5.8 Compressors startup procedure ........................................................................................................................... 19
5.9 Fan pre-starting in heating mode .......................................................................................................................... 19
5.10 Prepurge procedure with electronic expansion ..................................................................................................... 19
5.11 Prepurge procedure with thermostatic expansion ................................................................................................ 19
5.12 Oil heating ............................................................................................................................................................. 19
5.13 Energy Saving mode ............................................................................................................................................. 20
5.14 Pumpdown ............................................................................................................................................................ 20
5.15 Low ambient temperature start ............................................................................................................................. 20
5.16 Economizer valve .................................................................................................................................................. 20
5.17 Switch between cooling and heating mode .......................................................................................................... 20
5.17.1 Switching from cooling modes to eating mode ............................................................................................. 20
5.17.1.1 Compressor running in cooling mode .................................................................................................. 20
5.17.1.2 Compressor stopped in cooling mode ................................................................................................. 20
5.17.2 Switching from heating modes to cooling modes ......................................................................................... 21
5.17.2.1 Compressor running in heating mode.................................................................................................. 21
5.17.2.2 Compressor stopped in heating mode ................................................................................................. 21
5.17.3 Additional consideration ............................................................................................................................... 21
5.18 Defrost procedure ................................................................................................................................................. 21
5.19 Liquid injection ...................................................................................................................................................... 21
5.20 Heat Recovery procedure ..................................................................................................................................... 21
5.20.1 Recovery pump ............................................................................................................................................ 21
5.20.2 Recovery control ........................................................................................................................................... 22
5.20.3 Compressor limiting ...................................................................................................................................... 22
5.21 Unit limiting ............................................................................................................................................................ 23
5.22 Evaporator pumps ................................................................................................................................................. 23
5.23 Fans control .......................................................................................................................................................... 23
5.23.1 Fantroll .......................................................................................................................................................... 23
5.23.1.1 Fantroll in cooling mode ....................................................................................................................... 24
5.23.1.2 Fantroll in heating mode ...................................................................................................................... 24
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