Mitsubishi Ceiling Cassette Indoor Unit SLZ-KA25VAL

9.3.1. For wireless remote controller (Fig. 9-3)

• During the test run, ensure the water is being properly drained out and that no water is leaking from joints.

• Always check this during installation even if the unit is not required to provide cooling/drying at that time.

• Similarly, check the drainage before finishing ceiling installation in a new premises.

(1) Remove the cover of the water supply inlet and add about 1000 cc of water using a water supply pump etc. During this process, be careful not to spray water into the drain pump mechanism.

(2) Switching on emergency operation switch (cooling) on the grille.

(3) Confirm that water is being drained out through the drainage outlet.

(4) After checking the drainage, ensure that the cover is replaced and the power supply is isolated.

After installation of indoor and outdoor units, and piping and electric wiring work, recheck that the unit is free from leaks of refrigerant, loosened connections, and incorrect polarity.

Measure an impedance between the power supply terminal block (L, N, ) on the units and the ground with a 500 V Megger and check that it is equal to or greater than 1.0 MΩ.

9.2.1. For wireless remote controller (Fig. 9-1)

Measure an impedance between the power supply terminal block on the outdoor unit and the ground with a 500 V Megger and check that it is equal to or greater than 1.0 MΩ.

• Before performing the test run, recheck for any wrong wiring. Wrong wiring prevents normal operation or results in blown fuse disabling operation.

• Perform test run in the following procedure.