Friedrich Floating Air Pro-Premiere FPHW091 Service & Parts Manual page 58

Diagnostic Codes
THE FLASH IS 1 SECOND
No. LED1
1 BLINK
2 OFF
3 OFF
4 ON
5
6 ON
7 BLINK
8 ON
9 OFF
10 OFF
58
TROUBLESHOOTING
LED2 LED3
BLINK BLINK
OFF ON
ON ON
OFF ON
ON ON
OFF OFF
OFF OFF
ON BLINK
ON OFF
Reasons for the current operating frequency of
the compressor is limited
Normal frequency rising and decreasing, no
limitation
Frequency decreasing or prohibition of frequency
rising caused by over‑current
Frequency decreasing or prohibition of frequency
rising caused by anti‑freezing of refrigeration or
anti‑overload in heating
Frequency decreasing or prohibition of frequency
rising caused by too high compressor discharge
temperature
Limit to the max operating frequency caused by
too low power voltage
Operation at fixed frequency (in the case of
capability measuring or compulsory operation at
fixed frequency)
Protective frequency decreasing against outdoor
overload (overpower, over frequency conversion
rate, over torque, detection of DC under‑voltage)
Frequency decreasing caused by indoor and
outdoor communication fault
Frequency decreasing or prohibition of frequency
rising protection against overload of outdoor
coiled pipe
Frequency decreasing or prohibition of frequency
rising for power‑saving when it is being used
simultaneously with other appliances