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Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Features
Temperature Control Parameter Setting and Etc
• Function Code 21
: Setting Electric Heater On/Off temperature
Using Half capacity of electric heater : when DIP Switch No. 6 and 7 is set as ‘OFF-ON’ :
- Value #1 : outdoor air temperature where half capacity of electric heater starts operation.
- Value #2 : not used.
- Example : If Value #1 is set as ‘-1’ and DIP Switch No 6. and 7 is set as ‘OFF-ON’, then half capacity of electric
heater will start operation when outdoor air temperature is below -1°… and current leaving water temperature or
room air temperature is much belower than target leaving water temperature or target room air temperature.
Using Full capacity of electric heater : when DIP Switch No. 6 and 7 is set as ‘OFF-OFF’ :
- Value #1 : base outdoor air temperature.
- Value #2 : temperature gap (it means ‘how much colder than base outdoor air temperature?’)
- Example : If Value #1 is set as ‘-1’ and Value #2 is set as ‘3’ and DIP Switch No 6. and 7 is set as ‘OFF-OFF’,
then full capacity of electric heater will start operation when outdoor air temperature is below -4°C (-4 = Value #1
– Value #2) and current leaving water temperature or room air temperature is far much belower than target leav-
ing water temperature or target room air temperature.
• Function Code 22
: Setting Cut-off Temperature in Cooling Mode (FCU setting included)
Determine leaving water temperature when the product is turned off. This function is used fr preventing condensa-
tion on the floor in cooling mode.
- Value #1 : cut-off temperature. Value #1 is valid when Value #2 is ’01 (that means, FCU is installed)’.
- Value #2 : determines if FCU is installed or not. ’01’ means ‘FCU is NOT installed’, and ’00’ means ‘FCU is
installed.’
- Example : If Value #1 is set as ‘10’ and Value #2 is ’01’ and actually FCU is NOT installed in the water loop, the
product stop operation in cooling mode when the leaving water temperature is below 10 °C.
- Example : If Value #1 is set as ‘10’ and Value #2 is ’00’ and actually FCU is installed in the water loop, the Value
#1 is not used and the product do NOT stop operation in cooling mode when the leaving water temperature is
below 10 °….
FCU Installation
• If FCU is used, related 2way valve should be installed and connected to the indoor unit PCB.
• If Value #2 is set as ’00’ but FCU or 2way valve is NOT installed, the product can abnormal operation.
Function Code 23 and 24
: Setting Weather-dependent operation Mode
