Friedrich MD24Y3J Svc Manual page 78

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Title
code
Inverter PCB & Main
60
EEPROM check sum error
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.
n Error Diagnosis and Countermeasure Flow Chart
Is EEPROM insertion normal?
Yes
Is inverter PCB assembly normal?
Yes
MAIN PCB assembly normal?
Yes
Recheck power and installation condition
Check Point
- Check the EEPROM Check sum & Direction
* AUUW24GD2 [MR24UY3J]
Only for training and service purposes
Cause of error
EEPROM Access error
and Check SUM error
1.Check EEPROM insert direction/connection condition
No
2.Check EEPROM Check SUM
→ Replace if abnormality found
No
Replace inverter PCB assembly
No
Replace MAIN PCB assembly
- 78 -
Check point & Normal condition
1. EEPROM contact defect/wrong insertion
2. Different EEPROM Version
3. ODU Inverter & Main PCB assembly damage