Mitsumi electronic PLA-ABA Check of drainage Fig, Test run, When electric work is completed

7. Test run

• If the unit cannot be operated properly after the test run has been performed, refer to the following table to remove the cause.

		Symptom			Cause
	Wired remote controller		LED 1, 2 (PCB in outdoor unit
		For about 2 minutes	After LED 1, 2 are lighted, LED 2 is turned		•For about 2 minutes after power-on, operation of the remote
PLEASE WAIT			off, then only LED 1 is lighted. (Correct		controller is not possible due to system start-up. (Correct
		after power-on
			operation)		operation)
					•Connector for the outdoor unit’s protection device is not
PLEASE WAIT	Error code		Only LED 1 is lighted.	LED 1, 2 blink.	connected.
					Reverse or open phase wiring for the outdoor unit’s power
		Subsequent to about
					terminal block (L1, L2, GR)
		2 minutes after power-
Display messages do not appear					• Incorrect wiring between indoor and outdoor units (incorrect
		on
even when operation switch is			Only LED 1 is lighted.	LED 1 blinks
					polarity of S1, S2, S3)
turned ON			twice, LED 2 blinks once.
					•Remote controller wire short
(operation lamp does not light up).

On the wireless remote controller with condition above, following phenomena take place.

•No signals from the remote controller are accepted.

•Operation lamp is blinking.

•The buzzer makes a short ping sound.

Note:

Operation is not possible for about 30 seconds after cancellation of function selection. (Correct operation)

For description of each LED (LED1, 2, 3) provided on the indoor controller, refer to the following table.

LED 1	(power for microcomputer)	Indicates whether control power is supplied. Make sure that this LED is always lit.
LED 2	(power for remote controller)	Indicates whether power is supplied to the remote controller. This LED lights only in the case of the
		indoor unit which is connected to the outdoor unit refrigerant address “0”.
LED 3	(communication between indoor and outdoor units)	Indicates state of communication between the indoor and outdoor units. Make sure that this LED is
		always blinking.

Water supply pump

Water (about 1000cc, 1/4 gal)

Drain plug

Pour water through outlet

.Be carefule not to spray water into the drain pump mechanism.

7.4. Check of drainage (Fig. 7-5)

•Ensure that the water is being properly drained out and that no water is leaking from joints.

When electric work is completed.

. Pour water during cooling operation and check.

When electric work is not completed.

. Pour water during emergency operation and check.

*Drain pan and fan are activated simultaneously when single phase 220-240V is turned on to S1 and S2 on terminal block after the connecter (SWE) on controller board in the electrical branch box is set to ON.

Be sure to turn it back to the former state after work.

15