Mitsubishi Electric MSZ-FH25VE2-E1 Service Manual page 23

2. Flow chart of AIR PURIFYING power failure mode recall function
Operational procedure
The air purifying device might be abnormal.
Check if the air purifying device is abnormal according to the following procedures.
Make sure that the remote controller is set to 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.
Does POWER lamp on the indoor
unit blink at the interval of 0.5 seconds?
Blinks: The air purifying device is abnormal.
The air purifying device is abnormal.
Check the blinking pattern, and identify the abnormal point with
the AIR PURIFYING power failure mode table (10-2.5.).
Make sure to check at least 2 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.
Deleting the memorized abnormal condition
After repairing the unit, recall the failure mode again according to
"Setting up the failure mode recall function" mentioned above.
Press OPERATE/STOP (ON/OFF) (MSZ-FH25/35/50VE)/STOP/OPERATE (OFF/ON) (MSZ-FH25/35/50VE2)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"
mentioned above.
Note1. Make sure to release the failure mode recall function after 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 the air purifying device is abnormal:
2.5-second OFF
ON
OFF
Repeated cycle
3. AIR PURIFYING power operation check
AIR PURIFYING power goes ON when PURIFIER button on the remote contoller is pressed
with any set temperature displayed during failure mode recall function.
Check the operation display section of the remote controller to confirm that AIR PURIFYING power is activated.
While AIR PURIFYING lamp stays OFF, it means normal.
Flashing AIR PURIFYING lamp means abnormal, the AIR PURIFYING power is not conducted.
AIR PURIFYING lamp
Continuously blinking
2-time flash
NOTE: Perform the above mentioned check with the front panel closed. The interlock switch (Air purifying device) works by
opening front panel and the AIR PURIFYING power is cut.
OBH623D
Beep is emitted at the same timing as the
blinking of POWER lamp. 2
Yes
(Blinks)
Repair the failure parts.
Blinking at 0.5-
second interval
2.5-second OFF
Beeps
Repeated cycle
Follow "Check of AIR PURIFYING power" to identify the error. (Refer to 10-6. .)
AIR PURIFYING power control circuit on the indoor electronic control P.C. board is out of order.
(Refer to 10-6. .)
1
No
(OFF)
The air purifying device is normal.
2
Release the failure mode recall function according to the left
mentioned procedure.
Blinking at 0.5-
second interval
Beeps
Repeated cycle
Remedy
23
1. Regardless of normal or abnormal condition, a short
beep is emitted as the signal is received.
Beeps