Troubleshooting
Page 72
Check the fastening screws on the
PCB and IPM radiator.
Are they
fixed tightly?
Replace the outdoor
control PCB.
Tighten the screws and apply
silicon grease.
NO
YES
8.12 EC 0d(Outdoor unit malfunction Diagnosis and Solution)
Description: The indoor unit detect the outdoor unit is error.
Recommended parts to prepare:
• Outdoor unit
Troubleshooting and repair:
Is the main board
displaying an error?
Is the main board
displaying an error?
Power off, then restart the unit 2
minutes later. Does the outdoor main
board display an error code a few
minutes later?
Power off, then restart the unit 2
minutes later. Does the outdoor main
board display an error code a few
minutes later?
No
Yes
Refer to the prescribed
steps for resolving the
issue
Refer to the prescribed
steps for resolving the
issue
Yes
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