Friedrich FSHW091, Service And Parts Manual

Page: 112 / 171

112 PB
No. Malfunction
Name Display Method of Indoor Unit Display Method of Outdoor Unit A/C status Possible Causes
Dual‑8
Code
Display Indicator Display (During blinking,
ON 0.5s and OFF 0.5s) Indicator has 3 kinds of display status
and during blinking, ON 0.5s and
OFF 0.5s
Power
Indicator Cool
Indicator Heating
Indicator Yellow
Indicator Red
Indicator Green
Indicator
14 outdoor
ambient
temperature
sensor is
open/ short
circuted F3 OFF 3s
and blink
3 times OFF 1s
and blink 6
times During cooling and drying
operating, compressor stops
while indoor fan operates;
During heating operation,
the complete unit will stop
operation Outdoor temperature sensor
hasnt’ been connected well or
is damaged. Please check it
by referring to the resistance
table for temperature sensor)
15 outdoor
condenser
temperature
sensor is
open/ short
circuted F4 OFF 3s
and blink
4 times OFF 1s
and blink 5
times During cooling and drying
operation, compressor stops
while indoor fan will operate;
During heating operation,
the complete unit will stop
operation. Outdoor temperature sensor
hasnt been connected well or
is damaged. Please check it
by referring to the resistance
table for temperature sensor
16 outdoor
discharge
temperature
sensor is
open/ short
circuted F5 OFF 3s
and blink
for 5
times OFF 1S
and blink 7
times During cooling and drying
operation, compressor will
sop after operating for about
3 mins,
while indoor fan will operate;
During heating operation, the
complete unit will stop after
operating for about 3 mins. 1. Outdoor temperature sen‑
sor hasnt been connected well
or is damaged. Please check it
by referring to the resistance
table for temperature sensor
2. The head of temperature
sensor hasnt been inserted
into the copper tube
17 limit/
decrease fre‑
quency due to
overload F6 OFF 3s
and blink
for 6
times OFF 1s
and blink 3
times All loads operate normally,
while
operation frequency for
compressor is decreased Refer to the malfunction
analysis (overload, high
temperature resistant)
18 decrease fre‑
quency due to
overcurrent F8 OFF 3s
and blink
8 times OFF 1s
and blink
once All loads operate normally,
while
operation frequency for
compressor is decreased The input supply voltage is too
low; System pressure is too
high and overload
19 decrease
frequency
due to high
air discharge F9 OFF 3s
and blink
9 times OFF 1s
and blink
twice All loads operate normally,
while
operation frequency for
compressor is decreased Overload or temperature is
too high; refrigerant is insuf‑
ficent Malfunction of electric
expansion valve (EKV)
20 limit/
decrease fre‑
quency due to
antifreezing FH OFF 3s
and blink
2 times OFF 3s
and blink 2
times OFF 1s
and blink 4
times All loads operate normally,
while operation frequency for
compressor is decreased Poor air‑return in indoor unit
or fan speed is too low
TROUBLESHOOTING
Diagnostic Codes