Diagnosis And Solution - Carrier 40MPHA Service Manual

DIAGNOSIS AND SOLUTION

E0/F4/EA (EEPROM Parameter Error)
Description: Indoor or outdoor PCB main chip does not receive feedback from EEPROM chip.
Recommended parts to prepare:
• Indoor PCB
• Outdoor PCB
• Reactor
Troubleshooting and Repair:
Shut off the power supply.
Wait 2 minutes then turn back on.
NO The unit is operating normally.
Does the error code still appear?
YES
If the EEPROM chip is welded on the
main PCB, replace the main PCB.
Otherwise, check if the EEPROM chip
is plugged into the main PCB.
NO Correct the connection.
Is it plugged correctly?
Replace the indoor /outdoor
main PCB .
Remarks:
The location of the EEPROM chip on the indoor and outdoor PCB is shown in Figures 16 and 17:
Fig. 17 —EEPROM Chip (Outdoor Unit)
Fig. 16 —EEPROM Chip (Indoor Unit)
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40MPHA-03SM Specifications subject to change without notice.