SG-40MAHB-01: Service Manual
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17
DIAGNOSIS AND SOLUTION
EEPROM Parameter Error Diagnosis and Solution (E0/F4)
Malfunction Decision Conditions
Indoor or outdoor PCB main chip does not receive feedback from the EEPROM chip
Possible Causes:
• Installation error
• PCB faulty
Troubleshooting
EEPROM:
A read
−
only memory whose contents can be erased and reprogrammed using a pulsed voltage. For the EEPROM chip location,
refer to Fig 21 and Fig. 22.
Fig. 21 — Indoor PCB
Fig. 22 — Outdoor PCB (18K Model)
NOTE:
Figures 21 and 22
are for reference only and may differ from the actual unit.
Yes
Replace the indoor/outdoor
main PCB.
Power off, then restart the
unit 2 minutes later.
