Important Note For Wiring 4-Way Cassette Type - Panasonic S-22MU2E5BN Installation Instructions Manual

3-5-3. Checking the Drainage
Be careful since the fan will start when you short the pin on the indoor
CAUTION
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, N terminals) inside the electrical component
box.
(2) Slowly pour about 1 L of water into the drain pan to check drainage.
(3) Short the check pin (CHK) (6P : 5-6) 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 : 5-6) 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 : 5-6) 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".

3-6. Important Note for Wiring 4-Way Cassette Type

(1) The power supply inlet is located at the lower area of the refrigerant tubing side of the unit.
The electrical component box is located at the air intake of the bottom of the unit.
(2) Before installing the panel for cassette, be sure to carry out the wiring connection.
Drainage check
Over 100 mm
Plastic container
Water (Approx. 1 L)
for water intake
Drain pan outlet
Power supply inlet
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