Service and Parts Manual (2019, 2020, 2021, 2022)

47 PB
TROUBLESHOOTING
Diagnostic Codes
Outdoor Unit When The Compressor Is In Operation
THE FLASH IS 1 SECOND
No. LED1 LED2 LED3 Reasons for the current operating frequency of
the compressor is limited
1 BLINK BLINK BLINK Normal frequency rising and decreasing, no
limitation
2 OFF OFF ON Frequency decreasing or prohibition of
frequency rising caused by over-current
3 OFF ON ON Frequency decreasing or prohibition of
frequency rising caused by anti-freezing of
refrigeration or anti-overload in heating
4 ON OFF ON Frequency decreasing or prohibition
of frequency rising caused by too high
compressor discharge temperature
5 Limit to the max operating frequency caused
by too low power voltage
6 ON ON ON Operation at xed frequency (in the case of
capability measuring or compulsory operation
at xed frequency)
7 BLINK OFF OFF Protective frequency decreasing against
outdoor overload (overpower, over frequency
conversion rate, over torque, detection of DC
under-voltage)
8 ON OFF OFF Frequency decreasing caused by indoor and
outdoor communication fault
9 OFF ON BLINK Frequency decreasing or prohibition of
frequency rising protection against overload of
outdoor coiled pipe
10 OFF ON OFF Frequency decreasing or prohibition of
frequency rising for power-saving when it
is being used simultaneously with other
appliances