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_TROUBLE SHOOTING GUIDE BOOK __
It is a function to prevent freezing of ODU base pan in a cold area.
■ Setting the function
Function Option
Optional Base Panel Heater Fn 23 on, oFF
■ Option Selection
Setting Detail of function
on Base pan heater kit installation
oFF Base pan heater kit non-installation (Default)
■ Detailed information
•
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
Reduces ice
-
build up in the bottom of the unit that may occur in some installation scenarios where
drainage holes in the bottom pan of the unit are obstructed or where the surface temperature of the
bottom pan is below freezing.
•
The optional base pan heater maintains the bottom surface of the outdoor unit at a temperature
above 0℃ to keep condensate water in a liquid state while in the base pan. When the surface
temperature of the base pan is above 0℃, the condensate flows into channels formed in the pan
that guide the flow of water to one-inch diameter holes in the base pan along the bottom of the
channels in which water flows out the bottom of the unit. If the base pan surface temperature is be-
low 0℃, the condensate that contacts the surface of the pan will freeze preventing it from flowing in
the channels to the holes. As a result ice may build up in the bottom of the unit.
•
Using this setting, it allows a third party heater to be energized to keep the bottom surface of the
unit at a temperature above 0℃.
4.20 Optional Base Panel Heater
· Ask an authorized technician to setting a function.
· If do not use a function, set an off-mode.
· Heater is accessory.(sold separately)
5. SVC Mode
5.1 Pump Down
This function gathers the refrigerant present in the system to ODU.
Use this function to store refrigerant of system in ODU for leakage or IDU replacement.
■ Setting the function
Function Option
Pump Down SE 1 Pd (display "Low Pressure"), oFF
■ Flow Chart
*Note
1) If low pressure become under 307kPa,close the gas service valve of all ODU immediately.
*Note
2) If low pressure descends below 229kPa, the system turns off automatically. Close the gas
service valve immediately.
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