17 May 13

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

Solution: MULTIPLE SOLUTIONS

Cause: OUTDOOR UNIT CURRENT SENSOR FAULT

Remarks:

DESCRIPTION:

BIAS VOLTAGE OF THE PFC CURRENT SAMPLING CIRCUIT FAULT.

REPAIR:

1) CHECK IF REFRIGERANT HAS A LEAKAGE:

SOLUTION 1) FIND AND REPAIR THE LEAKAGE PROBLEM AND RECHARGE REFRIGERANT

2) SWITCH ON AC UNIT, MEASURE THE VOLTAGE BETWEEN “D21 + ” AND “GND” WITH A DIGITAL MULTIMETER:

SOLUTION 2) IF THE VOLTAGE IS +5V OR 0V, REPLACE THE OUTDOOR PCB (IN MOST CASES, REPLACEMENT OF OUTDOOR UNIT PCB IS NEEDED)