Friedrich Floating Air Pro-Premiere FPHW091 Service & Parts Manual page 57

Diagnostic Codes
Diag Outdoor Failure Description
Code
Compressor drive faulted
Outdoor fan motor locked rotor
protection
Outdoor coil anti-overload
protection with cooling
IPM module protection
PFC protection
Compressor pre heating process
Chip in outdoor board faulted
AC voltage higher or lower
protection
DC compressor start failure
Outdoor ambient temperature too
low protection
Mark description: the lights flash every two seconds for the following faults
Protection against overheated
outdoor radiator
Protection of the system against too
high pressure
57
TROUBLESHOOTING
LED1 LED2
BLINKS OFF
BLINKS BLINKS
OFF ON
OFF BLINKS
BLINKS OFF
BLINKS ON
ON OFF
ON ON
BLINKS BLINKS
BLINKS OFF
BLINKS OFF
BLINKS BLINKS
LED3 the root cause my be one of the following
BLINKS a.the outdoor drive board failed.
b.the compressor failed.
c. outdoor control board failed.
ON a.the connection of the outdoor fan motor is loose.
b.there is something blocking the outdoor fan.
c.the fan motor failed.
d.the outdoor control board failed.
OFF
a.There is too much refrigerant.
b.the outdoor fan motor failed.
c.the outdoor fan is broken.
d.the condensor is dirty.
e.the air inlet and air outlet of the indoor unit and
the outdoor unit is not normal.
OFF a.The IPM board failed.
b.The outdoor fan is broken.
c.The outdoor fan motor failed.
d.The outdoor fan has been blocked.
e.The condenser is dirty.
f.The outdoor unit has been installed without
standard.
OFF a.the PFC failed.
b.the outdoor drive board failed.
BLINKS it is normal mode in cold weather
BLINKS a. Using the wrong drive board.
b. Using the wrong compressor.
BLINKS a.the supply voltage is higher or lower than
normal.
b.the inner supply voltage of the unit is higher or
lower than normal.
OFF a.the outdoor drive board failed.
b.the compressor failed.
OFF a＆Outdoor ambient temperature too low.
OFF a. Radiator sensors failed.
b. Detection circuit of the sensor on the control
panel fails
OFF
a. The pressure switch fails
b. The pressure detection switch on the control
panel failed.
c. The measured value of the system pressure
exceeds the limit.
c. the