Mitsubishi Electric MXZ-2HA40VF-E1 Service Manual page 42

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.
*1
With the remote controller headed towards the indoor unit, press the
Temperature buttons to adjust the set temperature to 25°C. *2
Does the OPERATION INDICATOR lamp on the
indoor unit blink at the interval of 0.5 seconds?
Blinks: The outdoor unit is abnormal. Beep is emit-
ted at the same timing as the blinking of the
OPERATION INDICATOR lamp.
The outdoor unit is abnormal.
Check the blinking pattern, and make sure that the abnormal point with
the table of outdoor unit failure mode recall function (12-2.3.).
Make sure to check at least 2 consecutive blinking cycles.
Release the failure mode recall function. *1
Repair the failure parts.
Delete the memorized abnormal condition. *1
Release the failure mode recall function. *1
NOTE: 1. 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.
1. Refer to the service manual of indoor unit.
*
2. Regardless of normal or abnormal condition, 2 short beeps are emitted as the signal is received.
*
3. Blinking pattern when outdoor unit is abnormal:
*
2.5-second OFF 3-second ON
ON
OFF
Repeated cycle
OBH828B
3
*
Yes
(Blinks
)
3
*
Blinking at 0.5-
second interval
No beep
Beeps
No
(OFF)
Release the failure mode recall function. *1
2.5-second OFF 3-second ON
No beep
Repeated cycle
42
The outdoor unit is normal.
Blinking at 0.5-
second interval
Beeps
Repeated cycle