57 PB
TROUBLESHOOTING
Outdoor Unit
Diagnostic Codes when Compressor is Running
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 ON ON ON Operation at fixed frequency (in the case of capability measuring or
compulsory operation at fixed frequency)
6 BLINK OFF OFF Protective frequency decreasing against outdoor overload (over-
power, over frequency conversion rate, over torque, detection of
DC under-voltage)
7 ON OFF OFF Frequency decreasing caused by indoor and outdoor communica-
tion fault
8 OFF ON BLINK Frequency decreasing or prohibition of frequency rising protection
against overload of outdoor coiled pipe
9 OFF ON OFF Frequency decreasing or prohibition of frequency rising for power-
saving when it is being used simultaneously with other appliances
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