Product specifications

Samsung Electronics 53

4-5 Troubleshooting by symptoms

4-5-1 Communication error after finishing tracking (E202)

1. Check items

1) Is the communication cable short/open?

2) Is there a response from the Control kit PCB?

2. Check procedure

Yes

Is there a response from the $POUSPM kit PCB?

(LED901 (ORN) in NOT blinking)

Yes

In this case, is the

voltage waveform between the lines square

wave with amplitude over ±0.7V as shown

in the following picture?

+0.7V

-0.7V

Good

Bad

Check the communication cable and

exchange the $POUSPM kit PCB

Remove the communication cable

connecting the outdoor unit to indoor unit,

and measure the signal on LINE 2 of the

outdoor unit with a scope

Reconnect the cable connecting

the outdoor unit to the indoor unit

and restart the unit.

If the communication still doesn’t work,

dna BCP tik .mmoc eht ecalper

Check the communication

BCP hcae ni elbac

and replace the PCB

Yes

Is the power/communication

cable connected correctly?

Connect the power/communication

cable correctly.

outdoor unit PCB in order of mention.

cf.) If there is no oscillo scope, it can be replaced multimeter instead of osillo scope.

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