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_TROUBLE SHOOTING GUIDE BOOK __
It is a function to select the overall or partial defrost when the defrost is in operation.
■ Setting the function
Function Option
Overall Defrost Fn 4 on, oFF
■ Option Selection
Setting Detail of function
on Overall defrost
oFF Partial defrost (Default)
•
Overall Defrost - Return to heating after quick defrosting operation
•
Partial Defrost - Operate defrosting while heating
■ Detailed information
•
In locations where the relative humidity remains high during the heating season or where experience
has shown that defrosting all the outdoor units at the same time saves energy and/or shortens the
time it takes to defrost the outdoor unit coil without impacting the comfort level in the building.
•
This function is used with heat pump and heat recovery.
•
Heating mode is a change in the setting impact.
•
The operating symptoms that might be corrected using this function When the outside ambient air
temperature is above 0℃(32℉), visual inspection shows that all frost (or ice) is not cleared from the
outdoor unit's coil following a defrost cycle.
•
Overall defrost mode recommended environment When the temperature of continuous heating is kept
for a long time in a low temperature and high humidity environment in winter.
(outdoor temperature : -5℃ or less / humidity : 70% or more)
4.4 Overall Defrost
• Schematic Diagram
1) Overall Defrost
2) Partial Defrost (Heat Pump)
3) Partial Defrost (Heat Recovery)
· Ask an authorized technician to setting a function.
· Although the discharge temperature is lowered, the heating operation rate increases while partial
defrost.
· If you use continuous heating mode, please select partial defrost mode.
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