Carrier 40MAHB Series Service Manual page 16

40MAHB: Service Manual
DIAGNOSIS AND SOLUTION (CONT)
Outdoor EEPROM Parameter Error or Compressor Driven Chip EEPROM Parameter Error (EC51)
Description: Outdoor PCB main chip does not receive feedback from the EEPROM chip or the compressor driven chip.
Recommended parts to repair:
• Outdoor PCB
Troubleshooting
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Shut off the power. Wait two
minutes then turn the unit on.
Does the error code
still appear?
YES
Replace the outdoor main PCB.
NO The unit is operating normally.
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