Mitsubishi Electric MSZ-FD50VA-E1 Service Manual page 22

2. Flow chart of PLASMA operation failure mode recall function
Operational procedure
The plasma electrode 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 TOO
COOL or TOO WARM button to adjust the set temperature to 23°C. 1
Does POWER lamp on the indoor unit blink at the
interval of 0.5 seconds?
Blinks: The plasma electrode unit is abnormal. Beep
is emitted at the same timing as the blinking of
POWER lamp. 2
The plasma electrode unit is abnormal.
Check the blinking pattern, and refer to confi rm the abnormal point with
the PLASMA operation failure mode table. (10-2.5.)
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". (10-2.1.)
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 plasma unit is abnormal:
Blinking at 0.5-
second interval
2.5-second OFF
ON
OFF
Repeated cycle
3. PLASMA operation check
PLASMA operation goes ON when PLASMA button on the remote controller is pressed with any set temperature displayed
during failure mode recall function.
PLASMA lamp
Continuously blinking Follow "Check of PLASMA operation" to identify the error. (Refer to 10-6. )
There is failure in PLASMA operation control circuit on the indoor electronic control P.C. board. (Refer
2-time fl ash
to 10-6. )
Not lighted Normal
Yes
(Blinks
)
Repair the defective parts.
Blinking at 0.5-
second interval
2.5-second OFF
Beeps
Repeated cycle
No
(OFF)
Release the failure mode recall function accord-
ing to the left mentioned procedure.
Beeps Beeps
Repeated cycle
Correspondence
22
1. Regardless of normal or abnormal condition, 2 short
beeps are emitted as the signal is received.
The plasma electrode unit is normal.