AHT Cooling Systems GmbH
page 7
In the case of fault messages or damage to the unit, contact the maintenance service immediately (see →
chapter 10.4).
Contact with live parts may cause electric shock. Risk of fire due to sparks or overloading.
►Do not connect any damaged unit or damaged parts (e.g. power cables) to the circuit.
►Check the safety devices for completeness and functionality.
►Guards and covers on the unit must not be removed.
► Before connecting to power, note the following:
Applicable local electrical safety regulations
Applicable standards and safety notices.
Information on the serial plate (see → chapter 2.2.1).
►In the case of damage to the unit during operation or if the electrical protection was triggered and
before maintenance work, observe the following safety rules:
1. Disconnect the unit (switch off all pins on all sides).
2. Secure the unit against restarting.
►Damaged parts must be replaced only by professionals, e.g.:
power supply cables
►Do not squeeze or bend power supply cords.
►Do not use extension cords or multiple power strips.
►Steam or high-pressure cleaners may not be used for basic cleaning (see → chapter 10.1.1).
►Concealed electrical parts must not be damaged. Drilling or other work on the unit is not
permitted.
Refrigerant circuit
Work on the refrigerant circuit may only be performed by qualified staff.
In the case of fault messages or damage to the unit, contact the maintenance service immediately (see →
chapter 10.4).
Flammable refrigerant
Safety and warning notes for units with flammable refrigerants.
• The refrigerant R-290 belongs to safety group A3 according to ASHRAE 34.
The refrigerant used and the fill quantity are indicated on the power rating plate (see → chapter
2.2.1).
• The refrigerant is highly flammable.
If leaks occur, the refrigerant can escape and create an explosive gas/air mixture. This can lead to fire and
explosion with subsequent fire risk.
► Keep away from ignition sources (heat, sparks, open flames, hot surfaces).
►To remove condensation and for cleaning, use a damp cloth or sponge.
Do not use dry clothes or sponges for rubbing dry.
(Danger of electrostatic charging and sparking).
• Requirements for the installation area:
►The device must only be installed in well-ventilated areas.
►Do not install the unit in basements or lowered areas.
►Ducts and wall penetrations must be sealed close to the unit in accordance with fire protection laws
.
• Fluid refrigerant causes frostbite on the skin.
►Protect hands and face from contact with fluid/leaking refrigerant.
►Wear protective goggles and gloves.
• Do not close the air vents in the unit housing. Use only original accessories.
• To accelerate the defrosting process, do not use any mechanical devices or other means (e.g. ice
scrapers).
• Do not damage the refrigerant circuit.
►Do not expose the unit during storage and transport to temperatures higher than 70°C (158°F).
►Avoid transmission of pulsations and vibrations to the unit.
►Avoid external force upon the unit such as careless movements with forklift trucks or floor
cleaning machines.
►Drilling or other work on the unit is not permitted.
►Do not squeeze or bend pipes
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