79
Checking electrical connections of the external unit for firm seat-
ing
Danger
Contact with 'live' components
can result in severe injuries.
Capacitors remain 'live' after the
power supply has been switched
OFF.
Wait at least 4 min, until the
capacitors have discharged,
before starting work on the exter-
nal unit.
Starting the heat pump
!
Please note
Operation of the heat pump with
insufficient refrigerant results in
damage to the appliance.
■ Before starting the heat pump,
the internal unit and the refrig-
erant lines must be filled with
the specified amount of refrig-
erant and the refrigerant circuit
must have been checked for
leaks (see chapter "Filling
refrigerant lines and internal
unit" and "Checking the refrig-
erant circuit for tightness").
■ The external unit fill valves (see
chapter "Filling refrigerant lines
and internal unit") must be
open when the heat pump
starts.
The following sequence must be fol-
lowed:
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 internal unit is switched on before
the external unit or the waiting time is
shorter than 2 min, the fault message
"0A Fault external unit" appears.
Service instructions for
Vitotronic 200 heat pump control
unit.
Commissioning, inspection, maintenance
Further details regarding the individual steps
(cont.)
5604 692 GB
Service
