Mitsubishi Electronics 2.5KKC, PLH-2 Troubleshooting, Following do not indicate any malfunction

E7. Troubleshooting

Before you call out a repair man, check the following table to see whether there is a simple solution to your problem.

Problem	Display reading	Cause	Solution
Unit will not start.	Pilot lamp does not turn on even	Main power switch is turned off.	Turn main power on. Then press
	when the POWER ON/OFF button		the POWER ON/OFF button to turn
	is pressed.		the unit on.
		Main power fuse has blown.	Replace the fuse.
		Outdoor unit’s ground fault breaker is	Reset the ground fault breaker.
		open.
		A power cut has occurred (see NOTE	Wait until power is restored, then
		below).	press the POWER ON/OFF button
			to turn the unit on.
Unit discharges air well, but fails to	Remote controller shows that the unit	Improper temperature setting - e.g.	Check the set temperature on the re-
cool or heat the room well.	is operating.	you have selected COOL mode, but	mote controller and the actual intake
		the desired temperature setting is	air temperature. Use the COOLER
		higher than the current room tem-	and WARMER buttons to set the tem-
		perature.	perature as described in “Selecting
			a temperature” on page 10.
		Filters are clogged.	Clean the filter and resume opera-
			tion. See “Cleaning the filters and
			the indoor unit” on page 15.
		Outdoor unit’s intake or outlet is ob-	Remove the obstruction.
		structed.
		A door or window has been left open.	Shut door or window.
Unit does not start immediately.	Remote controller shows that the unit	Unit is waiting three minutes before	Wait until the unit restarts automati-
	is operating.	restarting.	cally.The compressor may hesitate
			resuming because a three-minute
			resume prevention circuit is incor-
			porated in the outdoor unit for pro-
			tection of the compressor.
Unit stops soon after starting.	Remote controller check display	Indoor or outdoor unit’s intake or out-	Remove obstruction and restart the
	reads “CHECK P6” or “CHECK P8”.	let is obstructed.	unit.
		Filters are clogged.	Remove the obstruction. Clean the
			filter and resume operation. See
			“Cleaning the filters and the indoor
			unit” on page 15.

NOTE: After a power cut, the unit will not restart automatically. You will have to restart it by pressing the POWER - ON/OFF button on the remote controller.

If none of the above apply, turn the main switch off and contact the dealer from whom you bought the air-conditioner, telling him the model name and the

nature of the problem. Do not try to fix the unit yourself.

In any of the following cases, turn off the main power switch and contact your local dealer for service:

•“CHECK” followed by “P1”, “P2”, “P3”, “P4”, “P5”, “P7” or “CENTRALLY CONTROLLED” is displayed on the control panel.

•The switches do not work properly.

•The circuit breaker trips frequently (or the fuse blows frequently).

•Water has accidentally been splashed into the unit.

•Water leaks from the unit.

•Something is accidentally dropped into the air-conditioner.

•An unusual noise is heard during operation.

The following do not indicate any malfunction:

Odours: smells such as tobacco or cosmetic odours may persist after they have been sucked into the unit.

Sound of liquid flowing inside indoor unit: this can occur during or after operation and is simply the sound of refrigerant being circulated inside the unit.

Ticking sound coming from indoor unit: this can occur when cooling or heating has just begun or has just stopped. It is caused by the indoor unit shrinking or expanding slightly due to the change in temperature.

The message “CENTRALLY CONTROLLED” appearing on the LCD panel: from time to time, this message may come up on the LCD panel. This does not indicate any malfunction.

Warning:

If the air conditioner operates but does not cool or heat (depending on model) the room, consult your dealer since there may be a refrigerant leak. Be sure to ask the service representative whether there is refrigerant leakage or not when repairs are carried out.

The refrigerant charged in the air conditioner is safe. Refrigerant normally does not leak, however, if refrigerant gas leaks indoors, and comes into contact with the fire of a fan heater, space heater, stove, etc., harmful substances will be generated.

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