36 Specifications subject to change without notice. 38MGR-04SM
DIAGNOSIS AND SOLUTION (CONT)
EEPROM parameter error (EO/E4)
Troubleshooting
EEPROM: A read-only memory whose contents can be erased and reprogrammed using a pulsed voltage.
Fig. 42 — EEPROM Chip
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
If the EEPROM chip
is welded on the main
PCB, replace the
main PCB.
Otherwise, check whether
the EEPROM chip is
plugged into main
PCB correctly.
Yes
No
Yes
Correct the connection.
Replace the main PCB.
Shut off the power supply and
turn it on 5 seconds later. Is it
still displaying the error code?
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