MTA HAST 080 N - Page 5

MAINTENANCE AND OPERATING MANUAL
Contents
HAS T 070÷140
4
ENGLISH
EN
The data in this manual are not binding and they can be modified by the manufacturer without notice. Reproduction of this manual is strictly prohibited.
6.2 Using the display ........................................................................................... 50
6.2.1 First power-up ................................................................................................ 50
6.2.2 Main menu ...................................................................................................... 51
6.2.3 Display menus ................................................................................................ 51
6.2.4 Powering up the unit ...................................................................................... 51
6.2.5 Power-on from a digital input ........................................................................ 51
6.2.6 Power-on by supervision system .................................................................... 51
6.2.7 Keys ................................................................................................................ 52
6.2.8 Icons ............................................................................................................... 53
6.3 I/O menu ........................................................................................................ 54
6.3.1 EX/MD auxiliary I/Os .................................................................................... 55
6.4 Setpoints Menu .............................................................................................. 57
6.5 User Menu...................................................................................................... 59
6.5.1 Autostart ......................................................................................................... 60
6.5.2 Display language ............................................................................................ 60
6.5.3 Buzzer ............................................................................................................. 60
6.5.4 Backlighting and contrast .............................................................................. 60
6.6 Alarm Menu................................................................................................... 60
6.7 Reserved menu............................................................................................... 61
6.7.1 Reserved menu icons ...................................................................................... 61
6.7.2 Access to menu functions ................................................................................ 62
6.7.3 Configuration ................................................................................................. 63
6.7.4 Compressors ................................................................................................... 63
6.7.5 Fans ................................................................................................................ 65
6.7.6 Anti-freeze ......................................................................................................67
6.7.7 Heat recovery ................................................................................................. 68
6.7.8 Regulation ...................................................................................................... 70
6.7.9 Defrost ............................................................................................................ 72
6.7.10 Operating hours ............................................................................................. 73
6.7.11 Manual procedure .......................................................................................... 73
6.7.12 Alarms set ....................................................................................................... 74
6.7.13 Log .................................................................................................................. 74
6.7.14 Pumps ............................................................................................................. 74
6.7.15 Date/time ........................................................................................................ 75
6.7.16 Time bands ..................................................................................................... 75
6.7.17 Modularity ...................................................................................................... 75
6.7.18 Supervision ..................................................................................................... 76
6.7.19 Unloading ....................................................................................................... 76
6.7.20 Special functions ............................................................................................. 77
6.7.21 Free-cooling ................................................................................................... 79
6.7.22 Other settings .................................................................................................80
6.8 Alarms............................................................................................................ 80
6.8.1 Buzzer ............................................................................................................. 80
6.8.2 Alarms list ....................................................................................................... 80
FUNCTIONS AND COMPONENTS OF THE UNIT .................................................................................89
7.1 Electronic thermostatic valve (optional)........................................................ 89
7.2 High pressure switches (HP).......................................................................... 89
7.3 Temperature and pressure transducers........................................................... 89
7.3.1 Pressure transducers ...................................................................................... 90
7.4 Flow switch.................................................................................................... 90
7.5 Level sensor ................................................................................................... 90
7.6 Forced ventilation of the electrical board ...................................................... 91
7.7 Antifreeze control .......................................................................................... 91
OPERATION AND MAINTENANCE .....................................................................................................92
8.1 Operation ....................................................................................................... 92
8.2 Maintenance................................................................................................... 92
8.2.1 Access to the unit's internal compartments .................................................... 92
8.2.2 Emptying of the evaporator ............................................................................ 93
8.2.3 Planning of checks and maintenance operations ...........................................94
TROUBLESHOOTING .........................................................................................................................95
R
ISK ANALYSIS: RESIDUAL RISK......................................................................................................98
A
PPENDIX........................................................................................................................................101
10.1 Settings table................................................................................................ 101