Installation & Maintenance
• Check the fan rotation direction. Air must flow
from the condenser towards the fan.
• Check current draw and voltage.
• Check suction superheat to reduce risk of
slugging.
• When a sight glass is provided, observe the oil
level at start and during operation to confirm
that the oil level remains visible.
• Respect the operating limits.
• Check all tubes for abnormal vibration.
Movements in excess of 1.5 mm require
corrective measures, such as tube brackets.
• When needed, additional refrigerant in the
liquid phase may be added in the low-pressure
side as far as possible from the compressor.
The compressor must be operating during this
process.
• Do not overcharge the system.
• Never release refrigerant to the atmosphere.
• Before leaving the installation site, carry out
a general installation inspection regarding
cleanliness, noise and leak detection.
• Record type and amount of refrigerant charge,
as well as operating conditions as a reference for
future inspections.
Always switch off the unit at main switch before
removing the fan panel.
Internal pressures and surface temperatures are
dangerous and may cause permanent injury.
Maintenance operators and installers require
appropriate skills and tools. Tubing temperature
may exceed 100 °C and therefore cause severe
burns.
Ensure that periodic service inspections to
ensure system reliability and as required by local
regulations are performed.
To prevent system related problems, following
periodic maintenance is recommended:
• Verify that safety devices are operational and
properly set.
• Ensure that the system is leak tight.
• Check the compressor current draw.
• Confirm that the system is operating in a way
consistent with previous maintenance records
and ambient conditions.
• Check that all electrical connections are still
adequately fastened.
• Keep the unit clean and verify the absence of
rust and oxidation on the unit components,
tubes and electrical connections.
The condenser must be checked at least once
a year for clogging and be cleaned if deemed
necessary. Access to the internal side of the
condenser takes place through the fan panel.
Microchannel coils tend to accumulate dirt on
the surface rather than inside, which makes them
easier to clean than fin-&-tube coils.
• Switch off the unit at main switch before
removing any panel from the condensing unit.
• Remove surface dirt, leaves, fibers, etc. with a
vacuum cleaner, equipped with a brush or other
soft attachment. Alternatively, blow compressed
air through the coil from the inside out, and
brush with a soft bristle. Do not use a wire
brush. Do not impact or scrape the coil with the
vacuum tube or air nozzle.
If the refrigerant system has been opened, the
system has to be flushed with dry air or nitrogen
to remove moisture and a new filter drier has to
be installed. If evacuation of refrigerant has to
be done, it shall be done in such a way that no
refrigerant can escape to the environment.
Always transmit the model number and serial
number with any claim filed regarding this
product.
The product warranty may be void in following
cases:
• Absence of nameplate.
• External modifications; in particular, drilling,
welding, broken feet and shock marks.
• Compressor opened or returned unsealed.
• Rust, water or leak detection dye inside the
compressor.
• Use of a refrigerant or lubricant not approved by
Danfoss.
• Any deviation from recommended instructions
pertaining to installation, application or
maintenance.
• Use in mobile applications.
• Use in explosive atmospheric environment.
• No model number or serial number transmitted
with the warranty claim.
Danfoss recommends that condensing
units and oil should be recycled by a
suitable company at its site.
Checks with running unit
Maintenance
Maintenance
Disposal
6
FRCC.ES.013.A1.02
Manual
