Mitsubishi Electric MXZ-2B30VA, Service Manual

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2. Flow chart of the detailed outdoor unit failure mode recall function
2.Blinking pattern when outdoor unit is abnormal:
ON
OFF
No beep
Beeps
Repeated cycle
2.5-second OFF 3-second ON
Blinking at 0.5-
second interval
No beep Beeps
Repeated cycle
2.5-second OFF 3-second ON
Blinking at 0.5-
second interval
Repeated cycle
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. 2
Yes
(Blinks
)
No
(OFF)
The outdoor unit might be abnormal.
Confi rm if outdoor unit is abnormal according to the following procedures.
Operational procedure
Confi rm that the remote controller is in the failure mode recall function.
3
With the remote controller headed towards the indoor unit, press the
TEMPERATURE buttons to adjust the set temperature to 25°C. 1
1 Regardless of normal or abnormal condition, 2 short
beeps are emitted as the signal is received.
The outdoor unit is abnormal.
Check the blinking pattern, and confi rm the abnormal point with the out-
door unit failure mode table (12-2.3.).
Make sure to check at least two consecutive blinking cycles. 2
Repair the defective parts.
The outdoor unit is normal.
Release the failure mode recall function. 3
NOTE : 1. Make sure to release the failure mode recall function once 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.
Delete the memorized abnormal condition. 3
Release the failure mode recall function. 3
3 Refer to the service manual of indoor unit.
Release the failure mode recall function. 3
OBH554D