Air Conditioner Service Manual
36
Solution: Check the connecter of sensor and slot, if loose or not plugged in, please connect again.
2) Outdoor pipe temp sensor damage.
Solution: Check and replace the sensor.
3) Outdoor PCB damage.
Solution: Check and replace the outdoor PCB.
10.5.1 Display E0,E5
Reason: Indoor / outdoor communication damage.
Solution:
1) Check if the indoor and outdoor connections are correct. The terminal L and N which connect to indoor
unit shall correspond to each other on indoor and outdoor units. Measure the voltage on outdoor
terminal L and N (before display of E0 fault). If the voltage is “0”, please replace indoor main PCB.
2) If the 1 & N which connect to indoor unit voltage is normal, measure the voltage between the outdoor
terminal 1 and N. If the voltage change occurs between 0~24V (change pulse voltage), please replace
indoor main PCB.
3) If the 1 & N which connect to indoor unit voltage is normal, measure the voltage between the outdoor
terminal 1 and N. If the voltage change occurs between 0~12V( change pulse voltage), but there is no
24V, please replace the outdoor PCB.
4) If the 1 & N voltage is normal, measure the voltage between the outdoor terminal 1 and N. If the
voltage has no change, firstly replace the indoor main PCB. If the fault remains unsolved, replace the
outdoor PCB.
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