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SDi Decades Extreme Service Manual www.ecoer.com
May. 2023Manufacturer reserves the right to change specifications or designs without notice.
Are the high pressure
switch and main control
boar wired correctly?
Method: Disconnect the plug.
Measure the resistance of the
high pressure protector, if the
protector is normal the value is
o, Does a problem still exist?
Yes
No
No
Yes
Is the high pressure
protector broken?
Is the outdoor ambient
temperature is higher
than 122℉?
No
Yes
Check if the outdoor unit
ventilation is good
Yes
Is the heat exchanger dirty?
Yes
High pressure protection
Is the outdoor fan
running properly?
No
Yes
No
Replace outdoor main board.
Is the problem resolved?
Connect high pressure switch
and main control board
Replace the high pressure
protector
Stop unit
Ensure the outdoor unit
ventilation is functioning properly
Please refer to the solution of the
fan speed is operating outside of
normal range malfunction
Clean the exchanger
Check whether the refrigerant
system is functioning properly
No
No
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