Flow Chart Of The Detailed Outdoor Unit Failure Mode Recall Function - Mitsubishi Electric MLZ-KP09NA Service Manual

2. Flow chart of the detailed outdoor unit failure mode recall function

Operational procedure
The outdoor unit might be abnormal.
Check if outdoor unit is abnormal according to the following procedures.
Make sure that the remote controller is set to the failure mode
recall function.
With the remote controller headed towards the indoor unit, press TOO COOL or TOO
WARM button to adjust the set temperature to 77ºF (25ºC).
Does OPERATION INDICATOR lamp on the indoor
unit blink at the interval of 0.5 seconds?
Blinks: The outdoor unit is abnormal.
Beeps are emitted at the same timing as the
blinking of OPERATION INDICATOR lamp.
The outdoor unit is abnormal.
Check the blinking pattern, and identify the abnormal point by referring
to the outdoor unit failure mode table
(Refer to outdoor unit service manual).
Make sure to check at least 2 consecutive blinking cycles.
Releasing the failure mode recall function
Release the failure mode recall function by the following procedures.
Turn OFF the power supply and turn it ON again.
Press RESET button of the remote controller.
Repair the failure parts.
Deleting the memorized abnormal condition
After repairing the unit, recall the failure mode again according to
"Setting up the failure mode recall function".
Press STOP/OPERATE (OFF/ON) button of the remote controller (the set temperature is
displayed) with the remote controller headed towards the indoor unit.
Press EMERGENCY OPERATION switch so that the memorized abnormal condition is deleted.
Release the failure mode recall function according to "Releasing the failure mode recall function".
Note1. Make sure to release the failure mode recall function after it is set up, otherwise the unit cannot operate properly.
2. If the abnormal condition is not deleted from the memory, the last abnormal condition is kept memorized.
2.Blinking pattern when outdoor unit is abnormal:
2.5-second OFF 3-second ON
ON
OFF
Repeated cycle
OBH802A
2
Yes
(Blinks)
2
Blinking at 0.5-
second interval
No beep
Beeps
sandium.com
1
No
(OFF)
Release the failure mode recall function according
to the left mentioned procedure.
2.5-second OFF 3-second ON
No beep
Repeated cycle
23
1. Regardless of normal or abnormal, 2 short
beeps are emitted as the signal is received.
The outdoor unit is normal.
Blinking at 0.5-
second interval
Beeps
Repeated cycle