LG Multi-Inverter Service Manual page 119

4. Trouble Shooting
Display
Title
code
51 Over capacity
Over capacity
60
Model
A7UW428FA3
A8UW488FA3
A9UW548FA3
Check Point
• CH 51
1. Check the indoor unit capacity.
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Only for training and service purposes
Cause of error
• Over capacity
• Check sum error
Gross Max. Capacity[Btu/h]
54k
62k
73k
Check point & Normal condition
• Check the indoor unit capacity.
• Check the combination table.
• Check the PCB ASM P/No.
• Check the poor soldering.
Max. Single Indoor Unit Capacity[Btu/h]
• CH 60
1. Check the insertion condition of EEPROM.
2. Check the poor soldering
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24k
LGE Internal Use Only