Friedrich Floating Air Pro-Premiere FPHW091 Service & Parts Manual page 63

Diagnostic Codes
Error Power Timer
Code 1 2
16 ON OFF
17 OFF ON
18 OFF ON
19 OFF ON
20 ON OFF
21 OFF OFF
22
24
26
27
33 ON BLINK
34 OFF BLINK
36 BLINK ON
38 BLINK BLINK
39 BLINK BLINK
63
TROUBLESHOOTING
Running
3 Content
ON Anti‑freeze protection
with cooling or overload
protection with heating in
OFF PFC protection
ON DC compressor start failure
BLINK Compressor drive in trouble
BLINK Outdoor fan motor locked
rotor protection
BLINK Outdoor coil anti‑overload
protection with cooling
Compressor pre heating
process
Chip in outdoor board in
trouble
Overheated outdoor radiator
Protection against too high
system pressure
BLINK The failure for temperature
sensor of indoor room
BLINK The failure for temperature
sensor of indoor coil
temperature
BLINK Communication failure
between the indoor unit and
outdoor unit
OFF Indoor EEPROM failure
ON Indoor fan motor run
abnormally
The root cause is may be one of the following
a.the indoor coil temperature sensor connector loose.
b.the indoor coil temperature sensor failed.
c.the indoor control board failed.
d. the refrigerant system is abnormal.
a.the PFC failed.
b.the outdoor drive board failed.
a.the outdoor drive board failed.
b.the compressor failed.
a.the outdoor drive board failed.
b.the compressor failed.
c. the outdoor control board failed.
a.the connection of the outdoor fan motor is loose.
b.there are something blocking the outdoor fan.
c.the fan motor failed.
d.the outdoor control board failed.
a.the refrigerant charge is exxcessive.
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 are abnormal.
it is normal mode in cold weather
a.Using the wrong drive board;
b.Using the wrong compressor.
a. Radiator sensor fails.
b. Detection circuit of the sensor on the control panel fails.
a. The pressure switch fails.
b. The pressure detection switch on the control panel fails.
c. The measured value of system pressure exceeds the
limit.
a. The indoor room temperature sensor loose;
b. The indoor room temperature sensor is failure;
c. The indoor control board is failure.
d. The indoor coil temperature sensor loose.
e. The indoor coil temperature sensor failed.
f. The indoor control board failed.
a.the communication cable connector loose.
b.the communication cable failed.
c.the connection between the filter board and the outdoor
control board is incorrect or loose.
d.the connection between the filter board and the terminal
is incorrect or loose.
e.the indoor control board failed.
f.the PFC board failed.
g.the power board failed.
h.the outdoor control board failed.
a. The EEPROM chip loose;
b. The indoor control board failed.
a. There is something blocking the indoor fan motor.
b. The fan motor cord connector loose.
c. The fan motor is failed.
d. The indoor control board failed.