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3-5-3. Checking the Drainage
Be careful since the fan will start when you short the pin on the indoor
unit control PCB.
After wiring (see Section “4. ELECTRICAL WIRING”.) and drain piping are completed, use the
following procedure to check that the water will drain smoothly. For this, prepare a bucket and
wiping cloth to catch and wipe up spilled water.
(1) Connect power to the power terminal board (L/1, N/2 terminals) inside the electrical
component box.
(2) Slowly pour about 1 L of water into the drain pan to check drainage.
Drainage check
Over
100 mm
Plastic container
for water intake
Water (Approx. 1 L)
Drain pan outlet
(3) Short the check pin (CHK) (6P : 1-4) on the indoor unit control PCB and operate the drain
pump. Check the water flow through the transparent drain pipe and see if there is any
leakage.
* If the check pin (CHK) (6P : 1-4) is shorted, the fan starts rotating at high speed and could
cause injury.
(4) When the check of drainage is complete, open the check pin (CHK) (6P : 1-4) and remount
the tube cover.
(5) Checkpoint after installation
After installation of indoor and outdoor units, panels and electrical wiring, check Section
“10. CHECKLIST AFTER INSTALLATION WORK”.
CAUTION
01_330918_EU_Eng.indb 19 2021/9/9 11:26:44
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