Service manual

9.3 Diagnosis and Solution

9.3.1 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

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 ?

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.

Indoor PCB Outdoor PCB

Note: The two photos above are only for reference, it’s may be not same totally with the ones on

our s

stem.