Contents2 Operating instructions aroTHERM 0020172515_05Contents1 Safety ............................................ 31.1 Action-related warnings ................. 31.2 Intended use .................................. 31.3 General safety information............. 42 Notes on the documentation ...... 82.1 Observing other applicabledocuments ..................................... 82.2 Storing documents......................... 82.3 Validity of the instructions .............. 83 Product description..................... 93.1 Design of the heat pumpsystem ........................................... 93.2 Type designation and serialnumber......................................... 103.3 Overview of the operator controlelements of the VWZ AI heatpump control module ................... 103.4 Digital Information and AnalysisSystem (DIA) ............................... 103.5 CE label ....................................... 114 Operation.................................... 114.1 Operating concept ....................... 114.2 Basic display................................ 124.3 Operating levels........................... 124.4 Design of the menu...................... 124.5 Live Monitor (status codes).......... 134.6 Displaying the building circuitpressure....................................... 134.7 Reading the operatingstatistics ....................................... 134.8 Displaying contact data................ 134.9 Displaying the serial numberand article number ....................... 134.10 Setting the display contrast.......... 134.11 Setting the language.................... 134.12 Switching the product on/off ........ 134.13 Operating noises.......................... 144.14 Activating frost protection ............ 144.15 Setting the target feedtemperature in heating mode....... 144.16 Setting a room thermostat orweather compensator .................. 144.17 Checks and maintenancecarried out by the operator........... 145 Troubleshooting ........................ 165.1 Detecting and rectifying faults...... 165.2 Reading the fault message .......... 175.3 Troubleshooting ........................... 176 Care and maintenance .............. 176.1 Maintenance ................................ 176.2 Caring for the product .................. 177 Decommissioning...................... 177.1 Having the product temporarilydecommissioned.......................... 177.2 Having the product permanentlydecommissioned.......................... 188 Recycling and disposal............. 188.1 Arranging disposal of coolant ...... 189 Guarantee and customerservice ........................................ 189.1 Guarantee.................................... 189.2 Customer service......................... 20