67
Danger
Contact with live components can lead to seri-
ous injury from electric current. Some compo-
nents on PCBs remain live even after the power
supply has been switched off.
■
When working on the outdoor unit, isolate the
system from the power supply, e.g. at a sepa-
rate MCB/fuse or a mains isolator. Check the
system is no longer live and safeguard against
reconnection.
■
Prior to working on the appliance, wait at least
4 min until the voltage on the charged capaci-
tors has completely dropped out.
Closing the heat pump
See page 58.
Switching on the power supply
Switch on the power supply at the main MCB/fuse.
Starting the heat pump
!
Please note
Operating the appliance with insufficient refriger-
ant results in appliance damage.
■
Before starting the appliance, the internal unit
and the refrigerant lines must be charged with
the indicated amount of refrigerant: See chap-
ter "Charging the refrigerant lines and internal
unit".
■
The refrigerant circuit must be checked for
tightness: See chapter "Checking the refriger-
ant circuit for tightness".
■
The fill valves on the external unit must be
open when the appliance is switched on: See
chapter "Charging the refrigerant lines and
internal unit".
Follow the sequence shown
1. Switch ON external unit voltage.
2. Wait 2 min.
3. Switch ON internal unit voltage.
4. Start internal unit at the ON/OFF switch.
Note
If the indoor unit is switched on before the outdoor unit
or the waiting time is shorter than 2 min, the fault mes-
sage "0A Fault external unit" or "05 Refrigerant cir-
cuit" appears.
"Vitotronic 200" service instructions
Commissioning the system
Commissioning (configuration, parameter settings and
function check) can be carried out with or without the
commissioning wizard (see following chapter and serv-
ice instructions for the heat pump control unit).
Note
The type and extent of the parameters depend on the
appliance type, on the selected system scheme and
the accessories employed.
Commissioning, inspection, maintenance
Checking the outdoor unit electrical connections for firm seating
6199585
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