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4 . --- R e f r i g e r a n t L e a k a g e D e t e c t i o n --- d i a g n o s i s a n d s o l u t i o n ( E C )
Error Code EC
Malfunction decision conditions
Defi ne the evaporat o r coi l te mp. T2 of the compre s s or just st art s runni ng as Tcoo l . In the beginni ng 5
mi nute s after the com pre ss o r star ts up, if T2 <Tc oo l---35. 6° F(Tc oo l--- 2° C) does not keep cont inuo us 4
sec o nds and this si t uati o n happens 3 ti me s , the displ ay area show s “EC” and AC turns off.
Supposed Causes
S T2 Sensor faulty
S Indoor PCB faulty
S System problems, such as leakage of blocking
Troubleshooting:
ADDITIONAL INFORMATION FOR CRITICAL PARTS:
Temperature sensor troubleshooting
Disconnect the temperature sensor from the PCB, and measure the resistance value with a multimeter.
Temperature sensors:
1. Room temperature (T1) sensor,
2. Indoor coil temperature (T2) sensor,
3. Outdoor coil temperature (T3) sensor,
4. Outdoor ambient temperature (T4) sensor,
5. Compressor discharge temperature (T5) sensor
Indoor Fan Motor
Measure the resistance value of each winding by using the multimeter.
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