Friedrich FSHW091 Service And Parts Manual page 111

Diagnostic Codes
No. Malfunction Display Method of Indoor Unit
Name
Dual‑8
Code
Display
9 Limit/ EU
decrease
frequency
due to high
temperature
10 Malfunction C5
protection of
jumper cap
11 Gathering F0
Refrigerant
12 Indoor ambi‑ F2
ent tempera‑
ture sensor is
open/ short
circuited
13 indoor F2
evaporator
temperature
sensor is
open/ short
circuted
111
TROUBLESHOOTING
Indicator Display (During blinking,
ON 0.5s and OFF 0.5s)
Power Cool Heating
Indicator Indicator Indicator
OFF 3s OFF 3s
and blink
and blink
6 times
6 times
OFF 3s
and blink
15 times
OFF 3s OFF 3s
and blink and blink
once once
OFF 3s
and blink
once
OFF 3s
and blink
twice
Display Method of Outdoor Unit
Indicator has 3 kinds of display status
and during blinking, ON 0.5s and
OFF 0.5s
Yellow Red Green
Indicator Indicator Indicator
OFF 1s
and blink
17 times
A/C status Possible Causes
All loads operate normally, Discharging after the
while complete unit is de‑energized
operation frequency for for 20mins, check whether
compressor is decreased the thermal grease on IPM
Module of outdoor control
the radiator is inserted tightly.
If its no use, please replace
control panel AP1.
Wireless remote receiver 1.No jumper cap insert on
and button are effective, but mainboard.
can not dispose the related 2.Incorrect insert of jumper
command cap.
3.Jumper cap damaged.
4.Abnormal detecting circuit of
mainboard.
When the outdoor unit receive Nominal cooling mode
signal of Gathering refrigerant
,the system will be forced to
run under cooling mode for
gathering refrigerant
During cooling and drying 1.Loosening or bad contact of
operation, indoor unit oper‑ indoor ambient temp. sensor
ates while other loads will and mainboard terminal.
stop; during heating operation, 2.Components in mainboard
the complete unit will stop fell down leads short circuit.
operation. 3.Indoor ambient temp.
sensor damaged.(check with
sensor resistance value chart)
4.Mainboard damaged.
AC stops operation once 1.Loosening or bad contact
reaches the setting tempera‑ of Indoor
ture. Cooling, drying: internal evaporator temp. sensor and
fan motor stops operation mainboard terminal.
while other loads stop 2.Components on the
operation; heating: AC stop mainboard fall down leads
operation short circuit
3.Indoor evaporator temp.
sensor damaged.(check temp.
sensor value
chart for testing)
4.Mainboard damaged.