LGRED Heat General Service Manual

Part 5. Trouble Shooting
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60
Inverter PCB & Main
EEPROM check sum error
EEPROM Access error
and Check SUM error
1. EEPROM contact defect/wrong insertion
2. Different EEPROM Version
3. ODU Inverter & Main PCB assembly damage
Display
code
Title Cause of error Check point & Normal condition
n Error Diagnosis and Countermeasure Flow Chart
Is EEPROM insertion normal?
No
Yes
Recheck power and installation condition
1.Check EEPROM insert direction/connection condition
2.Check EEPROM Check SUM
→ Replace if abnormality found
Is inverter PCB assembly normal?
No
Yes
Replace inverter PCB assembly
Yes
MAIN PCB assembly normal?
No
Replace MAIN PCB assembly
Check Point
- Check the EEPROM Check sum & Direction
18,24,30kBtu/h class
EEPROM
WARNING
Before checking PCB or each outdoor electric parts, wait for 3 minutes after the power is off. When measuring at standby state
of power supply, after checking the measurement mode of the meter, be careful of the short-circuits with other parts.