137
See page 64 onwards.
Removing the programming unit and electronics module
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.
■
Never touch electrical terminal areas.
■
When working on the indoor or outdoor unit,
isolate the system from the power supply, e.g.
at a separate fuse or a main switch.
Note
The indoor and outdoor unit can be fused sep-
arately.
Check that it is no longer live. Safeguard
against unauthorised reconnection.
■
Prior to working on the appliance, wait at
least 4 min until the voltage has completely
dropped out.
Danger
The absence of system component earthing can
lead to serious injury from electrical current and
component damage in the event of an electrical
fault.
All earth conductor connections must be recon-
nected.
The appliance and pipework must be connected
to the equipotential bonding of the building.
Note
Incorrectly executed electrical installations may cause
undesirable electromagnetic interaction with other
electronic devices.
Removing the HMI programming unit
Fig. 89
A
HMI programming unit
B
Connection pipe
Indoor unit maintenance
Overview of electrical terminal areas
6222080
Maintenance
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