TGM MWVIT09SA - 9.2 Troubleshooting Common Errors

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9.2 Trouble shooting
9.2.1 EEPROM parameter error diagnosis and solution(E0/F4)
Error Code
E0/F4
Malfunction decision
conditions
Indoor or outdoor PCB main chip does not receive feedback
from EEPROM chip.
Supposed causes ● Installation mistake
● PCB faulty
Trouble shooting:
If the EEPROM chip
is welded on
main
PCB, replace the
main PCB directly.
Otherwise, check
whether the
EEPROM chip
plugged in main PCB
well?
Yes
No
Yes
Correct the connection.
Replace the indoor/outdoor
main PCB.
Shut off the power supply and
turn it on 2 minutes later. Is it
still displaying the error code?
EEPROM: a read-only memory whose contents can be erased and reprogrammed using a pulsed
voltage. For the location of EEPROM chip, please refer to the below photos.
Note: The two photos above are only for reference, it’s may be not same totally with the ones
on your side.
Indoor PCB
Outdoor PCB