8-3. Checking the Outdoor System

8-3-1. Checking the outdoor unit

No.

Work procedure

Check items (unit operation)

 

 

 

1

• Apply 220 V AC between terminals L1 and L2 on the

• The LED (red) on the control board must illuminate.

 

outdoor unit terminal plate.

 

 

 

 

2

• Short-circuit the T-RUN terminal to the COM terminal

• The compressor and fan motor must turn ON.

 

of TEST/T-RUN terminals.

(They turn ON about (70) seconds later after the power

 

 

is turned ON.)

 

 

 

NOTE If the above check items are okay, but the outdoor unit does not operate, there may be a faulty connection between the indoor unit and the outdoor unit.

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Panasonic CU-4KS31NBU Checking the Outdoor System, Checking the outdoor unit, Work procedure Check items unit operation
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