Pump Down; Unit Protection Devices; Maintenance - Carrier XPOWER inverter series Handbuch

Pump down

For pump down procedure refer to the refirgerant connection manual

Unit protection devices

Operating
Type of safety device
mode
Heating Protection against jets of cold air
Protection against excessively
Heating
high heat exchanger temperatures
Outdoor heat exchanger defrost
Heating
cycle
Indoor heat exchanger frost
Cooling
protection
Cooling or
Delayed compressor start
heating
IMPORTANT!
During functioning in heat pump heating mode, the unit performs defrost cycles to eliminate any ice that might form at
low temperatures inside the outdoor unit. During defrosting, the indoor fan is automatically switched off and does not
start up again until defrosting has been completed.

Maintenance

The following maintenance operations must be
carried out by qualified personnel.
Cleaning the coil
If necessary, proceed as follows for more careful
cleaning of the coil:
Switch the mains supply OFF.
What happens
The internal fan is switched off or
the speed is changed
Compressor operation frequency is
reduced or stopped altogether
The indoor and outdoor unit fans
are switched off
Compressor operation frequency is
reduced or stopped altogether
The compressor does not start
immediately when the appliance is
switched on
Remove unit top cover by losening the fixing screws
and lifting the cover. Carefully clean the coil with a
vacuum cleaner from inside to outside. With the same
vacuum cleaner, remove the dust from inside the fan
compartment and the fan blades. Avoid any damage to
the blades which may cause future vibrations and noise.
Replace the unit cover and tighten the screws.
When the safety device
trips
Upon start-up or during
functioning
During functioning
During functioning
During functioning
On start-up or on mode
change
38XPS - 38XP- 8