Outdoor Unit - Mitsubishi Electric MUZ-SF25VE-E1 Service Manual

2. Flow chart of the detailed outdoor unit failure mode recall function
Operational procedure
The outdoor unit might be abnormal.
Confi rm if outdoor unit is abnormal according to the following procedures.
Confi rm that the remote controller is in the failure mode recall function.
With the remote controller headed towards the indoor unit, press TEMP
button to adjust the set temperature to 25°C. 1
Does the left lamp of OPERATION INDICATOR lamp
on the indoor unit blink at the interval of 0.5 seconds?
Blinks: The outdoor unit is abnormal. Beep is emitted
at the same timing as the blinking of the left
lamp of OPERATION INDICATOR lamp. 2
The outdoor unit is abnormal.
Check the blinking pattern, and confi rm the abnormal point with the out-
door unit failure mode table (11-2.3.).
Make sure to check at least two consecutive blinking cycles. 2
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.
Deleting the memorized abnormal condition
After repairing the unit, recall the failure mode again according to "Setting up the failure mode recall
function" (11-2.1.).
Press OPERATE/STOP (ON/OFF) 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" men-
tioned above.
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.
2.Blinking pattern when outdoor unit is abnormal:
2.5-second OFF
ON
OFF
OBH629
Yes
(Blinks
)
Repair the defective parts.
Blinking at 0.5-
3-second ON second interval
No beep
Beeps
Repeated cycle
1. Regardless of normal or abnormal condition, 2 short
beeps are emitted as the signal is received.
NOTE: It takes up to 1 minute to indicate the outdoor unit
abnormality.
Even if the OPERATION INDICATOR lamp is not
lighting, keep checking at least 1 minute or longer.
No
(OFF)
Release the failure mode recall function accord-
ing to the left mentioned procedure.
2.5-second OFF 3-second ON
No beep
Repeated cycle
30
The outdoor unit is normal.
4 The information regarding whether the
connected outdoor unit is a low-standby-
power model or a non-low-standby-power
model will also be initialized.
4
(Default= compatible with a low-standby-
power model)
Blinking at 0.5-
second interval
Beeps
Repeated cycle