4
■
Do not remove, block or bridge safety
equipment.
■
Do not make any changes:
Do not modify the outdoor unit, inlet/
outlet lines, electrical connections/
cables or the surroundings. Do not
remove any components or seals.
Working on the system
■
Switch off the power supply to the
indoor unit and outdoor unit, e.g. at a
separate fuse or mains isolator. Check
that the system is no longer live.
Note
In addition to the control circuit there
may be several power circuits.
Danger
Contact with live components can
result in severe injuries. Some
components on PCBs remain live
even after the power supply has
been switched off.
Prior to removing covers from the
appliances, wait at least 4 minutes
until the voltage has completely
dropped out.
■
Safeguard the system against recon-
nection.
■
Wear suitable personal protective
equipment when carrying out any work.
Danger
Hot surfaces and fluids can result in
burns or scalding. Cold surfaces
may cause frostbite.
■
Prior to servicing or maintenance
tasks, switch off and allow the
equipment to cool down or warm
up.
■
Do not touch hot or cold surfaces
on the appliance, fittings or pipe-
work.
!
Please note
Electronic assemblies can be dam-
aged by electrostatic discharge.
Before beginning work, touch
earthed objects, such as heating or
water pipes, to discharge any static.
Work on the refrigerant circuit
R290 refrigerant (propane) is an air dis-
placing, colourless, flammable, odour-
less gas which forms explosive mixtures
with air.
Refrigerant drained must be properly
disposed of by authorised contractors.
Perform the following measures before
beginning work on the refrigerant circuit:
■
Check the refrigerant circuit for leaks.
■
Ensure very good ventilation especially
in the floor area and sustain this for the
duration of the work.
■
Secure the area surrounding the work
area.
■
Inform the following persons of the
type of work to be carried out:
–
All maintenance personnel
–
All persons in the vicinity of the sys-
tem.
■
Inspect the area immediately around
the heat pump for flammable materials
and ignition sources:
Remove all flammable, movable mate-
rials and any ignition sources from the
safety zone.
■
Before, during and after the work,
check the surrounding area for escap-
ing refrigerant using an explosion-proof
refrigerant detector suitable for R290.
This refrigerant detector must not gen-
erate any sparks and must be suitably
sealed.
Safety instructions
Safety instructions (cont.)
6222080
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