Temperature Control Parameter Setting And Etc - LG Therma V AHBW Series Service Manual

Temperature control parameter setting and etc

• Function Code 21 : Setting electric heater On / Off temperature
Using Step 1 capacity of electric heater : when DIP switch No. 6 and 7 is set as 'OFF-ON' :
- Value #1 : outdoor air temperature where Step 1 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 Step 1 capacity of elec-
tric heater will start operation when outdoor air temperature is below -1 °C and current leaving water temperature
or room air temperature is much belower than target leaving water temperature or target room air temperature.
Using Step 2 capacity of electric heater : when DIP switch No. 6 and 7 is set as 'OFF-OFF' :
- Value #1 : base outdoor air temperature.
- Value #2 : not used
- Example : If Value #1 is set as '-1' and DIP switch No 6. and 7 is set as 'OFF-OFF', then step2 capacity of elec-
tric heater will start operation when outdoor air temperature is below -1 °C and current leaving water temperature
or room air temperature is much belower than target leaving 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 unit is turned off. This function is used fr preventing condensation
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 in-
stalled.'
- Example : If Value #1 is set as '10' and Value #2 is '01' and actually FCU is NOT installed in the water loop, the
unit 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 unit do NOT stop operation in cooling mode when the leaving water temperature is below
10 °C.
FCU Installation
• If FCU is used, related 2way valve should be installed and connected to the Main PCB assembly 1.
• If Value #2 is set as '00' but FCU or 2way valve is NOT installed, the unit can do abnormal operation.
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