Introduction Scope Of Functions; Setting Levels; System User; Service - Viessmann PLC VITOCAL 350-HT PRO Service Instructions For Contractors

Scope of functions
These service instructions include the following infor-
mation regarding the heat pump control unit
SPS (PLC) Vitocal 350-HT Pro for VIESSMANN heat
pumps:
■ Function description
■ Control parameters for matching the heat pump to
the different requirements and operating conditions
■ Diagnosis options for heating system and refrigerant
circuit

Setting levels

To prevent incorrect operation of the heat pump and
other system components, not all setting options are
available at every setting level.

System user

This setting level is suitable for persons who have
been instructed in the operation of the heating system
by the heating contractor (specialist).
■ The system is switched on and off from the main
page.
■ The menu is launched with the "Menu" button.
The menu offers further functions such as setting
time programs or displaying an overview of the sys-
tem.

Service

Additional functions and parameters are available at
this setting level.
To change password-protected settings, please see
the "Login and language" and "Configuration" chap-
ters.
■ Troubleshooting measures
■ Overview of electrical connections
Overview of the Modbus
■
For a standard system scheme, see the installa-
tion and service instructions of the relevant heat
pump.
Example:
Control parameters can only be called up in the "Serv-
ice" setting level or higher.
For functions at the "System user" setting level,
see the operating instructions.
Note
■ The password-protected settings may only be per-
formed by heating contractor personnel who have
been trained in the use of Viessmann heat pumps.
Introduction
7