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SDi Decades Extreme Service Manual www.ecoer.com
May. 2023Manufacturer reserves the right to change specifications or designs without notice.
8.7.27 PC 41(Outdoor compressor current sampling circuit failure diagnosis and solution)
Description: Three-phase sampling offset voltage error, the static bias voltage is normally 2.5V
Recommended parts to prepare:
• Outdoor main PCB
Troubleshooting and repair:
8.7.28 EH b3 (Communication error between wired controller and indoor unit Diagnosis
and Solution
Description: If Indoor PCB does not receive feedback from wired controller, the error displays on the wired
controller
Recommended parts to prepare:
• Connection wires
• Indoor PCB
• Wired controller
Troubleshooting and repair:
The unit is operating normally.
Replace the outdoor main PCB.
Is it still displaying
the error code?
Shut off the power supply and
turn it on 2 minutes later.
YES
NO
Does the error still exist?
Replace the wired controller
Does a problem remain? The unit is operating normally
NO
Check the wirings and connections
YES
Are all the
connections good?
Ensure proper connections
NO
YES
Replace the indoor main PCB
The problem is solved
NO
Power off, then restart the unit after 2 minutes.
YES
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