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SDi Decades Extreme Service Manual www.ecoer.com
May. 2023Manufacturer reserves the right to change specifications or designs without notice.
8.7.1 EH 00 / EC 51 (EEPROM Parameter Error Diagnosis and Solution)
Description: Indoor or outdoor PCB main chip does not receive feedback from EEPROM chip.
Recommended parts to prepare:
• Indoor PCB
• Outdoor PCB
Troubleshooting and repair:
Remarks:
EEPROM: A read-only memory whose contents can be erased and reprogrammed using a pulsed voltage.
The location of the EEPROM chip on the indoor and outdoor PCB is shown in the following two images:
Note: For certain models, outdoor PCB could not be removed separately. In this case, the outdoor electric
control box should be replaced as a whole. This pictures are only for reference, actual appearance may vary.
Troubleshooting and repair of compressor driven chip EEPROM parameter error and communication error
between outdoor main chip and compressor driven chip are same as EC 51.
8.7 Troubleshooting by Error Code
S hut o f f t he p o w er supp ly a n d
turn it o n 2 m i nu tes later.
Is it still displaying
th e error cod e ?
Th e unit is op erati ng normally.
Replace the indoor main PCB(EH 00)
/outdoor main PCB(EC 51).
Yes
No
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