Mitsubishi Electric MSZ-FA25VA Service Manual page 15

Mitsubishi ilmalämpöpumput huoltaa ja korjaa: Jäähdytinpalvelu RefGroup Oy
2. Flow chart of PLASMA DEODORIZING/PLASMA AIR PURIFYING power failure mode recall function
Operational procedure
There is a possibility that the plasma unit is abnormal.
Confirm the presence of abnormality according to the following procedures.
Confirm that the remote controller is in the failure mode recall
function.
W1
With the remote controller headed towards the indoor unit, press TOO COOL or TOO
WARM button to adjust the set temperature to 23:.
Confirmation of abnormality presence
Does POWER lamp on the indoor
unit blink at the interval of 0.5 seconds?
Blinks: The plasma unit is abnormal.
Beep sounds are emitted at the same timing
of the blinking of POWER lamp.
The plasma unit is abnormal.
Check the blinking pattern, and refer to confirm the
abnormal point(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.
1With the remote controller headed towards the indoor unit, press any button
that is not used in this failure mode recall function (e.g. TIMER button) .
OR
1Turn OFF the power supply and turn ON it again.
2Press RESET button of the remote controller.
Repair the defective parts.
Deleting the abnormal condition
1After repairing the unit, recall the failure mode again according to
"Setting up the failure mode recall function" mentioned above.
2Press EMERGENCY OPERATION switch so that the memorized
abnormal condition is deleted.
3Release 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 outdoor unit is abnormal:
Blinking at 0.5-
2.5-second OFF second interval
ON
OFF
Beeps
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 controller is pressed
once while the indoor error indication is being checked or after one short beep sound (signal reception beep) is emitted.
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, and it means normal.
Flashing PLASMA/WASH lamp means abnormal, and the plasma power is not being conducted.
PLASMA/WASH lamp
Follow "Check of PLASMA DEODORIZING power" or "Check of PLASMA AIR PURIFYING power"
Continuously flashes
to identify the error.(Refer to 9-6.F or G.)
PLASMA DEODORIZING power 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. Panel open is detected by the SAFETY DEVICE
(PLASMA UNIT).
No
W2
(OFF)
Yes
(Blinks)
Blinking at 0.5-
2.5-second OFF second interval
Beeps
Repeated cycle
PLASMA AIR PURIFYING power goes ON
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W1. Regardless of normal or abnormal, a short
beep is emitted as the signal is received.
The plasma unit is normal.
Release the failure mode recall function according to the left
mentioned procedure.
Beeps
Repeated cycle
Action
Cancel