Check Maifunction Process - Gree GWH18AC-D3DNA1B Service Manual

Troubleshooting
9.2.3 Check Malfunction Process
Refer to indicator on indoor/outdoor unit and malfunction table (paste on the electric of cover or the top cover of unit) to confirm the malfunction
type.
The indicator of outdoor controller panel will display the related malfunction;
Some malfunctions are to be displayed on the indoor display, while others will be seen on remote controller (press light button 4 times continuously
in 3S).
In below malfunction diagnoses process, "Y" is for "Yes"; "N" is for "No";
In below malfunction diagnoses process, controller panel AP1 is for outdoor controller panel;
Discharge electrolytic capacity and confirm voltage decreases to
20V below according to before method, if not, electrical shock or
control panel damaged may occurr!!
9.2.3.1 Capacity charging malfunction (outdoor unit malfunction)
Indoor unit display: PU (dual-8 display), heating indicator is off for 3S and blinks 17 times.
Main detection point:
Detect if the voltage of L and N terminal of wiring board is between 210AC-240AC by alternating voltage meter;
Is reactor (L) well connected? Is connection wire loosened or pull-out? Is reactor (L) damaged?
Malfunction diagnosis process:
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