31 Jan 97

Symptom: MGTC-20, DXTC-20, DXTH-20 – ERROR CODE FB

Solution: NORMAL PROTECTION

Cause: LIMITING/REDUCING FREQUENCY FOR OVERLOAD PROTECTION ON COOLING/HEATING MODE

Remarks:

DESCRIPTION:

THE COIL TEMPERATURE IS TOO HIGH:

1. COOLING MODE: THE OUTDOOR UNIT COIL TEMPERATURE, OR
2. HEATING MODE: THE INDOOR UNIT COIL TEMPERATURE

WHEN THE TEMPERATURE REACHES TO THE POINT WHERE FREQUENCY LIMITATION/REDUCTION IS NEEDED, IT WILL ACTIVATE THE FB PROTECTION.

REPAIR:

1) THIS IS A NORMAL PROTECTION