Product specifications

Samsung Electronics 4-12

4-5-3 The Outdoor unit Fan error

1. Checklist :

1) Are the input power voltage and power connection correct?

2) Is the motor wire connected to the outdoor PCB correctly?

3) Is there no obstacle at the surrounding of motor and propeller?

4) Does the driver in the motor case broken?

2. Troubleshooting procedure

Yes

Is the connection of FAN housing certainly to

PCB socket?(CN40, CN41)

Take off each Fan motor housing after 1 minutes from

turning off the power

Is each resistance of FAN cable housing pin #1-#3 over

1Mohm, pin #4-#3, #5-#3 and #6-#3 over 1Kohm on

each FAN motor?

Mount each Fan housing to PCB socket and turn

on the power

Is the Pin voltage #1 - #3 of CN40 and 41over 250V?

Is the Pin voltage #5 - #3 of CN40 and 41 15V?

Is the Pin voltage #5 - #3 of CN40 and 41within 1-6V

during the operation?

Is the Fan in rotation during TEST operation in

cooling mode

Is the Pin voltage #6 - #3 of CN40 and 41changed

high(4-5V) and low(0-1V) in case ofmaking manual

rotation slowly?

Is the Pin voltage #7 - #3 of CN40 and 41 low(0-1V) in

normal rotation?

Check AC power source. Reconnect wires correctly

Exchange the FAN motor because of driver inside

of the motor case broken

Follow the check procedure of outdoor unit power

supply error check

Exchange INVERTER PCB

Exchange the FAN motor not in rotation

Exchange INVERTER PCB

Exchange the FAN motor

Yes

# TEST operation #

press K900 button on the

MAIN PCB after power on.

- once : cooling mode

- twice in a second : heating mode