Mitsubishi Electric M Series Manual page 158

WALL-MOUNTED Inverter Heat Pump
MSZ-FD25VA
MSZ-FD25VAS
MSZ-FD35VA
MSZ-FD35VAS
MSZ-FD50VA
MSZ-FD50VAS
Flow chart of PLASMA operation failure mode recall function
Operational procedure
The plasma electrode unit might be abnormal. Confirm if plasma electrode
unit is abnormal according to the following procedures.
Confirm 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
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.
The plasma electrode unit is abnormal.
Check the blinking pattern, and refer to confirm the abnormal point
with the PLASMA operation failure mode table.
Make sure to check at least two 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 defective 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 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".
NOTE1. Make sure to release the failure mode recall function once it is set up, otherwise the unit can not 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
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.
There is failure in PLASMA operation control circuit on the indoor electronic control
2-time flash
P.C. board.
Not lighted
Normal
C-156
. 1
2
Yes
(Blinks)
Blinking at 0.5-
second interval
2.5-second OFF
Beeps
Repeated cycle
1. Regardless of normal or abnormal condition, a short
No
(OFF)
The plasma electrode unit is normal.
2
Release the failure mode recall function according to the left
mentioned procedure.
Beeps Beeps
Repeated cycle
Correspondence
beep is emitted as the signal is received.
M series