20 Nov 66

Symptom: DXF-19, DXH-19, MGC-19 – ERROR CODE E1

Solution: MULTIPLE SOLUTIONS

Cause: INDOOR/OUTDOOR UNIT COMMUNICATION ERROR

Remarks:

DESCRIPTION:

THE INDOOR UNIT HAS NOT RECEIVED FEEDBACK FROM THE OUTDOOR UNIT FOR 110 SECONDS, FOR 4 CONSECUTIVE TIMES.

REPAIR:

1) TURN POWER OFF, THEN RESTART THE UNIT AFTER 2 MINUTES:

DOES A PROBLEM REMAIN?

NO = THE UNIT IS OPERATING NORMALLY
YES = CHECK 2)

2) MEASURE VS. (VS IS THE VOLTAGE BETWEEN S AND N OF THE OUTDOOR UNIT. RED PAN-S, BLACK PAN-N):

IS THE VOLTAGE MOVING ALTERNATELY BETWEEN POSITIVE AND NEGATIVE?

NO = THE VOLTAGE IS A CERTAIN VALUE –> CHECK THE INDOOR WIRING CONNECTIONS –> IS IT NORMAL? YES = REPLACE THE INDOOR PCB. POWER ON. –> IS THE ERROR RESOLVED? NO = REPLACE THE OUTDOOR PCB

YES = THE VOLTAGE MOVES ALTERNATELY WITH POSITIVE VALUE –> CHECK THE OUTDOOR WIRING CONNECTION –> IS IT NORMAL? YES = CHECK 3)

3) CHECK THE REACTOR:

IS IT NORMAL?

NO = REPLACE THE REACTOR
YES = REPLACE THE OUTDOOR PCB. POWER ON. –> IS THE ERROR RESOLVED? NO = REPLACE THE INDOOR PCB