LG Multi V 5 - Comfort Cooling

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_TROUBLE SHOOTING GUIDE BOOK __
6.7 Comfort Cooling
It is function to reduce the ODU energy consumption by the continuous operation without thermo off.
■ Setting the function
Function Option
Comfort Cooling Id 10
seg1, seg2 : IDU No.
seg3, seg4 : 0, 1~3
■ Option Selection
seg1, seg2 seg3, seg4 seg3, seg4
1 ~ 64
0 No setting
1 Cooling capacity low, Power consumption low
2 Cooling capacity mid, Power consumption mid
3 Cooling capacity high, Power consumption high
• Set EACH IDU : Select "Idu" → "Id10" → EACH → Select IDU No. → Set Value
• Set All IDU : Select "Idu" → "Id10" → ALL → Set Value
■ Detailed information
• This function is used with heat pump and heat recovery.
• Possible setting condition
Indoor setting temperature - Indoor temperature < -2℃
• Operation
- Exist Indoor unit humid sensor : Use Indoor unit humid Value
- Non Exist Indoor unit humid sensor : Use Default Value
- Accurate superheat control using calculated values
· For detailed logic, please refer to the next appendix page.
• Comfort Cooling means the superheat control of indoor unit.
: Changes the refrigerant flow rate of each indoor unit by EEV
• Comfort Cooling is controlled by 2 factors.
- 1
st
: 『Room temperature (Tair) - Setting temperature (Ttarget)』
- 2
rd
: Relative humidity (default : outdoor humidity)
(Refer to indoor humidity if we applied standard III remote controller inside)
■ Cooling Operation Logic
1. Room temperature (T
air
) - Setting temperature (T
target
)
• In case of standard humidity condition
- condition.1 : superheat adjustment value is 0 (comfort cooling step.1 setting)
* refer to next slide (remote controller setting)
- condition.2 : relative humidity is between 50% and 70%
T
air
- T
target
Superheat Temp. Variation (℃)
< -0.5 +2
-0.5 ≤ & < 0.5 +2
0.5 ≤ & < 1.5 +1
1.5 ≤ & < 2.5 +1
2.5 ≤ & < 3.5 0
3.5 ≤0 0
2. Relative humidity effect
• In case of high humidity condition (RH 100 ~ 70%)
- No superheat temp. variation (not related with Tair - Ttarget )
• In case of low humidity condition (RH 50 ~ 30%)
- heat temp. variation was increased up to +3℃ (max)
RH(%) 100~70 70~50 50~30 30~
T
air
-T
target
Target Coil Temp.
< -0.5 0 +2 +3
-0.5 ≤ & < 0.5 0 +2 +3
0.5 ≤ & < 1.5 0 +1 +2
1.5 ≤ & < 2.5 0 +1 +2
2.5 ≤ & < 3.5 0 0 +1
3.5 ≤0 0 0 +1
2℃ High
0℃ Low
superheat
App. The Logic of Comfort Cooling
Basic Part
Multi V 5
Intorduction
Trouble Shooting
Function Control
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