Heat Controller A-MMC36FA-1, B-MMH12FA-1 manual Trouble 4 When indoor Fan does not operate, Nector

Troubleshooting Guide

Trouble 4 When indoor Fan does not operate.

When indoor Fan does not operate.

Does the voltage of each terminals of CN-MOTOR CONNECTOR in

Indoor unit corresponds to values in the Table of page 70

Does the voltage of terminal of CN-DC/DC CONNECTOR in Indoor unit that corresponds to the values in the table of page 70

Check connection condition of the CN-MOTOR CON-

NECTOR

Does the voltage of terminal of CN-DC/DC CONNECTOR in Outdoor unit corresponds to the values in the table of page 70

Check the pattern and the condition of Indoor unit PCB Ass'y.

Check for any interference of Indoor Fan.

NO

Check the patterns and the conditions of outdoor unit PCB Assy's.

Check the condition of con- necting wires between Indoor and Outdoor unit.

Check the motor of Indoor Fan

Indoor Fan may be off in the Soft Dry Mode(change to the Cooling Operation Mode).

Indoor Fan is off when Indoor pipe(coil) termperature is lower than 79°F. (At that time, the defrost indicator is turn on.)

- 69 - Service Manual