Friedrich FSHW091, Service And Parts Manual

Page: 110 / 171

110 PB
TROUBLESHOOTING
Diagnostic Codes
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
1 High
Pressure
Protectioon
Of System E1 OFF 3s
and blink
once During cooling and drying
operation, except indoor
fan operates, all loads stop
operation.
During heating operation, the
complete unit stops. Possible reasons:
1.Refrigerant was super‑
abundant;
2.Poor heat exchange
(including filth blockage of
heat exchanger and bad
radiating environment );
Ambient temperature is
too high.
2 Antifreezing
protection E2 OFF 3s
and blink
twice OFF 1 s
and blink 3
times During cooling and drying
operation, compressor and
outdoor fan stop while indoor
fan operates. 1.Poor air‑return in indoor
unit;
2.Fan speed is abnormal;
3.Evaporator is dirty.
3 In Defect of
refrigerant F0 OFF 1 s
and blink 9
times The Dual‑8 Code Display will
show F0 and the complete
unit stops. 1.In defect of refrigerant;
2.Indoor evaporator
temperature sensor works
abnormally;
3. The unit has been
plugged up somewhere.
4 High
Discharge
temperaature
protection of
compressor E4 OFF 3s
and blink 4
times OFF 1s
and blink 7
times During cooling and drying
operation, compressor and
outdoor fan stop while indoor
fan operates. During heating
operation, all loads stop. Please refer to the malfunc‑
tion analysis (discharge
protection, overload).
5 Overcurrent
protection E5 OFF 3s
and blink 6
times OFF 1s
and blink 5
times During cooling operation,
compressor stops while
indoor fan motor operates.
During heating operation, the
complete unit stops. 1. Supply voltage is unstable;
2. Supply voltage is too low
andload is too high;
3. Evaporator is dirty.
6 Communica‑
tion malfunc‑
tion E6 OFF 3s
and blink 6
times Always on During cooling operation,
compressor stops while
indoor fan motor operates.
During heating operation,
the complete unit stops.
Refer to the corresponding
malfunction analysis.
7 High
temperature
resistant
prtoection E8 OFF 3s
and blink 8
times OFF 1s
and blink 6
times During cooling operation:
compressor will stop while
indoor fan will operate.
During heating operation, the
complete unit stops. Refer to the malfunction
analysis (overload, high
temperature resistant).
8 EEPROM
malfunction EE OFF 3s
and blink
15 times OFF 1s
and blink
11 times During cooling and drying op‑
eration, compressor will stop
while indoor fan will operate;
During heating operation, the
complete unit will stop Replace outdoor control
panel AP1