E4: High Temperature Protection

E4 TROUBLESHOOTING STEPS:

Step 1: Check the Outdoor Fan Motor

• Inspect the outdoor fan motor for any signs of malfunction or irregularities.

• Verify the wiring and connections to the outdoor fan motor.

• Ensure that the fan blades are free from obstructions and can rotate freely.

• Test the functionality of the outdoor fan motor.

Step 2: Check for Dirty Filters, Coils

• Examine filters and coils for dirt or debris that may obstruct airflow.

• Clean or replace dirty filters.

• Clean coils to ensure efficient heat exchange.

Step 3: Check the Temp Sensor

• Inspect the temperature sensor for proper functioning.

• Verify the wiring and connections to the temperature sensor.

• Replace the sensor if necessary.

Step 4: Check for Restriction

• Inspect the system for any restrictions in airflow.

• Clear any obstructions or blockages that may be restricting airflow.

Step 5: Check the Expansion Valve

• Inspect the expansion valve for proper operation.

• Verify the wiring and connections to the expansion valve.

• Replace the expansion valve if necessary.

Step 6: Check the Strainer

• Inspect the strainer for any signs of clogging or blockage.

• Clean or replace the strainer as needed.

Step 7: Check by 4 Point Temp Check

• Perform a 4-point temperature check to assess the system's performance.

• Check temperatures at various points to identify any irregularities.

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