20 Nov 109

Symptom: DXG-18, DXH-18, MGC-18 – ERROR CODE B7

Solution: MULTIPLE SOLUTIONS

Cause: GAS VALVE TEMPERATURE SENSOR IS ON / SHORT-CIRCUITED

Remarks:

REPAIR:

1) CHECK THE TEMPERATURE SENSOR:

SOLUTION 1) CHECK IF THE TEMPERATURE SENSOR IS NOT WELL CONNECTED OR DAMAGED. IF YES, PLEASE FIX CONNECTION OR REPLACE THE SENSOR IF DAMAGED

2) CHECK THE WIRING OF TEMPERATURE SENSOR:

SOLUTION 2) CHECK IF THE WIRE OF TEMPERATURE SENSOR IS DAMAGED (CAUSING SHORT CIRCUIT TO COPPER PIPE OR OUTER CASING). IF IT IS DAMAGED, PLEASE REPLACE THE WIRING AND ENSURE PROPER CONNECTION

3) CHECK MAIN BOARD OF OUTDOOR UNIT:

SOLUTION 3) CHECK IF MAIN BOARD OF OUTDOOR UNIT IS DAMAGED OR NOT. IF YES, PLEASE REPLACE THE OUTDOOR UNIT PCB