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error GE
Error Code E4
Compressor discharge high temperature protection.
? What Causes This
Valves not fully open, faulty electronic expansion valve, improper fan operation (cooling mode), blockages or obstructions in lines, ambient temperatures too high for operation, low refrigerant level or clogged refrigerant line sets.
✓ How to Fix It
Open valves completely, check and correct operation of the expansion valve, operate fans correctly, unclog refrigerant lines, avoid running unit at extreme temperatures if possible, ensure proper charge of the system.
Source: page 28 of the official manual
From the manual
This error code appears in:
GE 24922 Universal Remote