24
（
1
）
E0- Overcurrent Protection of Indoor Unit
Explanation of
error
Cause: The main control panel detects that the working current of the
system exceeds the upper limit of protection, and will indicate "indoor
unit overcurrent protectin:. The air conditioner stopps running for
protection and displays the failure code E0.
Inspection path: current transformer
→
power line
→
compressor
line
→
connector assembly
Tools required
for inspection
Current clamp and multimeter
Frequent
problematic part
Indoor unit panel, power line, compressor and complete machine
Inspection
procedure and
key points
1.
If it is a fixed-frequency model, observe whether the live line passes
through the current transformer; if not, lay the line accordingly and
reboot for inspection.
2.
The current clamp is used to measure the working current and
determine whether it is within the normal working current range of the
nameplate. If normal working current is detected, it may be the fault of
the current transformer and replace the main control panel of the
indoor unit.
3.
Measure whether the power supply voltage is within the normal
operating voltage range; if the working voltage is not normal, it is
necessary to consider whether the local grid voltage is stable.
4.
If the working current exceeds the range and the working voltage is
normal, the system may be blocked and the air-conditioning may be
overloaded, which needs to be checked according to the actual
situation.