koppel KV 24CC-ARF21 - Page 123

Troubleshooting
2.4.2.4. E4 malfunction
Judge1:Outdoorcondensertemp.sensor(T3)ismalfunction
E4 display
No
No
Replacecondensertemp.sensor(T3)
Checkwhetherthewiringofthe
condensertemp.sensor(T3) is
brokenoff
Checkwhethertheresistanceof
condensertemp.sensorT3) iswrong
refertotheAppendix 1
Yes
ConnectthewiringwellYes
Judge2:Outdoorambienttemp.sensor(T4)ismalfunction
No
Replaceoutdoorambient
temperaturesensor(T4)
Checkwhetherthewiringofthe
outdoorambienttemperature
sensor(T4)isbrokenoff
Checkwhethertheresistanceof
outdoorambienttemperature
sensor(T4)iswrongrefertothe
Appendix 1
Yes
ConnectthewiringwellYes
Judge3:Compressordischarge temp.sensor(T5)ismalfunction
No
Replacecompressordischarge
temperaturesensor(T5)
Checkwhetherthewiringofthe
compressordischarge temperature
sensor(T5)isbrokenoff
Checkwhethertheresistanceof
compressordischarge temp. sensor
(T5)iswrongrefertotheAppendix 2
Yes
ConnectthewiringwellYes
No
ReplaceoutdoormainPCB
No
121