148
E8
Overload System Protection Problem
Status:
Cooling operation, compressor stops while
indoor fans runs. Heating operation, complete
unit stops
Error Code Diagnostics
E8 Error Code
Overload System Protection Problem
1. Incorrect refrigerant charge
2. Metering device problem
3. Compressor failure
Start Troubleshooting
after unit is powered off for
20 minutes
Is the overload protector
positioned and wired
correctly?
No
Correct wiring
problem
Are the wires to the expansion
valve connected per the
wiring diagram?
No
Resistance between the first 4
pins and the 5th pin should be
less than 100 ohms
Replace coil of electronic
expansion valve
Under normal ambient conditions, is
the resistance of the overload less
than 1000 ohms?
Replace
Overload
No
Is system operating
normal?
Check Refrigerant for
leakage and proper
charge
Is system working
properly?
No
Replace outdoor
AP1 control
board
No
Yes
End Troubleshooting
Yes
Compressor Overload
Metering Device