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Maintenance
8
Maintenance
DANGER
Danger to life due to fire!
The product contains the flammable refrigerant R290. If a leak occurs,
the refrigerant may form a combustible gas due to mixing with air. There
is a risk of fire and explosion.
▶ Only personnel with special training for refrigerant R290 may
perform work on the refrigerant circuit.
▶ Wear personal protective equipment.
▶ Have access to a fire extinguisher.
▶ Check that tools and equipment are faultless and approved for
refrigerant R290.
DANGER
Electrical shock!
The heat pump contains current-carrying components and the heat
pump capacitor must be discharged once the power supply has been
disconnected.
▶ Isolate the system from the supply.
▶ Wait at least five minutes before carrying out electrical work.
NOTICE
Malfunction due to damage!
The electronic expansion valves are highly sensitive to impacts.
▶ Always protect the expansion valve from impacts and shock.
NOTICE
Deformation due to heat!
If the temperature is too high, the insulation material (EPP) in the heat
pump deforms.
▶ Remove as much insulation (EPP) as possible before carrying out
soldering work.
▶ When carrying out soldering work in the heat pump, protect the
insulation material with heat-resistant materials or a moist cloth.
▶ Use only original spare parts!
▶ Order spare parts using the spare parts list.
▶ Remove and replace old seals and O-rings with new ones.
During service, the activities described below should be performed.
Show activated alarms
▶ Check the alarm log ( control unit manual).
Function check
▶ Perform function check ( indoor unit manual).
Power cable routing
▶ Check whether the electrical cable has mechanical damage.
▶ Replace damaged cables.
Evacuate refrigerant
▶ This action may only be carried out by trained personnel with
knowledge of the properties of and risks associated with the
refrigerant R290.
▶ Wear personal protective equipment and have a fire extinguisher to
hand.
▶ Only use tools and equipment approved for refrigerant R290.
▶ Follow the safety instructions [6721836841] on how the refrigerant
is to be evacuated from the product.
▶ Recycle the refrigerant according to applicable regulations.
20
8.1
Cleaning of the drip tray
Use a brush and a cloth with a mild detergent when cleaning. Do not use
a water hose.
1. Take off the left side cover.
2. Unscrew the screw holding the EPP parts together.
Fig. 38 Unscrew
3. Take out the two EPP parts.
1.
2.
Fig. 39 EPP parts
AW 4 | 5 | 7 OR-S – 6721866761 (2023/06)
0010044598-001
0010044599-001
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