Mitsubishi Electric MSZ-FA25VA Service Manual page 15

2. Flow chart of PLASMA DEODORIZING/PLASMA AIR PURIFYING power failure mode recall function
Operational procedure
The plasma unit might be abnormal.
Confirm if plasma 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:. W1
Does POWER lamp on the indoor
unit blink at the interval of 0.5 seconds?
Blinks: The plasma unit is abnormal.
Beep are emitted at the same timing as the
blinking of POWER lamp.
The plasma unit is abnormal.
Check the blinking pattern, and refer to confirm the
abnormal point with the PLASMA DEODORIZING/PLASMA AIR
PURIFYING power failure mode table (9-2.5.).
Make sure to check at least two consecutive blinking cycles. W2
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 abnormal memorized condition
1After repairing the unit, recall the failure mode again according to
"Setting up the failure mode recall function" mentioned above.
2Press OPERATE/STOP(ON/OFF) button of the remote controller (the set temperature is displayed)
with the remote controller headed towards the indoor unit.
3Press EMERGENCY OPERATION switch so that the memorized abnormal condition is deleted.
4Release the failure mode recall function according to "Releasing the failure mode recall function"
mentioned above.
Note1. Make sure to release the failure mode recall function once it's 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.
W2.Blinking pattern when plasma unit is abnormal:
2.5-second OFF
ON
OFF
Repeated cycle
3. PLASMA DEODORIZING/PLASMA AIR PURIFYING power operation check
PLASMA DEODORIZING/PLASMA AIR PURIFYING power goes ON when PLASMA button on the remote contoller is pressed
with any set temperature displayed during failure mode recall function.
PLASMA button is pressed, the power of plasma is changed in sequence:
PLASMA DEODORIZING power goes ON
Check the operation display section of the remote controller to confirm that PLASMA DEODORIZING power or PLASMA AIR
PURIFYING power is activated.
While PLASMA/WASH lamp stays OFF, it means normal.
Flashing PLASMA/WASH lamp means abnormal, the plasma power is not conducted.
PLASMA/WASH lamp
Follow "Check of PLASMA DEODORIZING power" or "Check of PLASMA AIR PURIFYING power"
Continuously blinking
to identify the error.(Refer to 9-6.F or G.)
PLASMA DEODORIZING power and/or PLASMA AIR PURIFYING power control circuit on the indoor
2-time flash
electronic control P.C. board is out of order.(Refer to 9-6.F or G.)
NOTE: Perform the above mentioned check with the front panel closed (Refer to 9-1.6 Figure5). The SAFETY DEVICE
(PLASMA UNIT) works by opening front panel and the plasma power is cut.
W2
Yes
(Blinks)
Repair the defective parts.
Blinking at 0.5-
second interval
2.5-second OFF
Beeps
Repeated cycle
PLASMA AIR PURIFYING power goes ON
No
(OFF)
The plasma unit is normal.
Release the failure mode recall function according to the left
mentioned procedure.
Blinking at 0.5-
second interval
Beeps
Repeated cycle
Action
15
W1. Regardless of normal or abnormal, a short
beep is emitted as the signal is received.
Beeps
Cancel