40MBFAQ: Service Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
15
DIAGNOSIS AND SOLUTION
EH 00/EH 0A/EC 51 (EEPROM Parameter Error Diagnosis and Solution)
Description: Indoor or outdoor PCB main chip does not receive feedback from the EEPROM chip.
Recommended parts to prepare:
• Indoor PCB
• Outdoor PCB
Troubleshooting
REMARKS:
EEPROM: A read only memory whose contents can be erased and reprogrammed using a pulsed voltage. Review figures 18
and 19 for the location of the EEPROM chip on the indoor and outdoor PCB.
Fig. 18 — EEPROM Chip (Indoor)
Fig. 19 — EEPROM Chip (Outdoor)
NOTE: For certain models, the outdoor PCB cannot be removed separately. In this case, the outdoor electric control box should be replaced
as a whole. This images are only for reference and the actual appearance may vary. Troubleshooting and repair of the compressor
driven chip EEPROM parameter error and communication error between the outdoor main chip and the compressor driven chip
are the same as EC 51.
Shut o the power supply and
turn it on 2 minutes later.
Is it still displaying
the error code ?
YES
Replace the indoor main
PCB(E0/EA) /outdoor main
PCB(F4).
Unit is operating as designed.
NO
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