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c)
Defrosting
i.
Automatic active defrosting: When the machine is operating in low temperatures it is very
common for ice to build up on the external coil. The heat pump has a built in defrost protection
program which will activate when it senses ice starting to form.
When machine is defrosting, starts flashing; after defrosting is on continuously
ii.
Forced defrosting: : If the heat pump requires manually defrosting for testing or a sensor is
faulty please follow these instructions, the machine must be in heating mode and the
compressor is working continuously for more than ten minutes, Whilst the unit is running,
press and on the controller simultaneously and hold for 5 seconds. When the
symbol is flashing, defrost has started, and will continue until the external coil temperature
reaches a certain temperature adequate for continuued operation. If the symbol stops flashing
forced defrost has stopped.
Note 1 : the interval between forced defrosting should be more than 30 minutes apart.
Note 2 : Defrost mode usually last for around 15 minutes, during this period, the heat pump fan will stop
running, and relatively louder noise will be heard. The heat pump will reverse the refrigeration cycle in an
attempt to melt any frost that have formed on the internal components, therefore its totally normal to witness
higher condensation rate around the unit (Frost melting) and white smoke coming out of the unit (Water
Vapor).