Carrier 38MHRC Service Manual page 34

38MHRC: Service Manual
DIAGNOSIS AND SOLUTION (CONT)
Indoor and Outdoor Unit Communication Error (E1)
Description: The indoor/outdoor unit communication
Possible causes:
• Wiring mistake
• Faulty Indoor or outdoor PCB
Troubleshooting
A210596
For certain models, outdoor PCB could not be removed separately. In this case, the outdoor electric control box should be replaced as a whole.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
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