TROUBLESHOOTING & REFERENCES
J-20
ENGLISH
Topic TitleFlow Charts
Code disappears after
power off/on again
Check outdoor
PCB, If faulty,
replace it.
No
[1] Outdoor EEPROM Malfunction
EEPROM communication error; EEPROM data check
error (model ID, checksum, etc.); EEPROM data logic
error (wider data range, wrong order, etc.)
Possible causes:
• EEPROM is bad
• Loose EEPROM wiring
Correct the wiring
Is electric box wiring correct,
and is compressor wiring firmly
connected?
Is compressor normal
(compressor coil resistor,
insulation)?
Is power module normal?
Replace compressor
Replace power module
Yes
Yes
Yes
No
No
No
Solve or correct any
failures according to
relative information
[2] Outdoor IPM over current or short circuit
3U24EH2VHA
Input over current detected by PIM’s hardware.
Possible causes:
• The IPM is bad
• Loose compressor wire
• The compressor is bad
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