Friedrich Floating Air Pro-Premiere FPHW091 Service & Parts Manual page 61

Diagnostic Codes
Error Power Timer
Code
1 2
26
27
33 BLINK OFF
34 BLINK OFF
36 BLINK ON
38 BLINK ON
39 BLINK OFF
41 ON ON
61
TROUBLESHOOTING
Running Sleep
3 4 Content
Overheated outdoor radiator
Protection against too high
system pressure
OFF ON The failure for temperature
sensor of indoor room
ON OFF The failure for temperature
sensor of indoor coil
temperature
OFF ON Communication failure
between the indoor unit and
outdoor unit
ON ON Indoor EEPROM failure
ON ON Indoor fan motor run
abnormally
BLINK ON The failure for Indoor
grounding protective
The root cause is may be one of the following
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 failed.
c. The indoor control board failed.
a. The indoor coil temperature sensor loose.
b. The indoor coil temperature sensor failed.
c. The indoor control board failed.
a. the communication cable connect loose.
b. the connection between the filter board
and the terminal is incorrect or loose.
c. the communication cable failed.
d. the connection between the filter board and
the outdoor control board 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 are something block the indoor fan
motor.
b. The fan motor cord connect loose.
c. The fan motor failed.
d. The indoor control board failed.
The indoor control board failed.