Mitsubishi Electric MSZ-FH25VE2-E1 Service Manual page 35

When AIR PURIFYING lamp flashes 2-time.
When POWER lamp flashes 1 to 5 times while AIR PURIFYING power failure mode is recalled.
E Check of AIR PURIFYING power
After performing the check, make sure to release the failure mode recall function.
Turn ON the power supply.
Does AIR PURIFYING lamp
flash 2-time with unit stopping?
Make sure that the front panel is firmly closed.
While pressing both OPERATION SELECT
button and TEMP + button on the remote controller at the
same time, press RESET button.
First, release RESET button.
Hold down the other two buttons for another 3 seconds.
Make sure that the indicators on the LCD screen shown in the
right figure are all displayed. Then release the buttons.
Press OPERATE/STOP (ON/OFF) (MSZ-FH25/35/50VE)/
STOP/OPERATE (OFF/ON) (MSZ-FH25/35/50VE2) button.
(the set temperature is displayed)
And press PURIFIER button once with the remote controller
headed towards the indoor unit.
AIR PURIFYING operation is selected.
The AIR PURIFYING power operation check mode is set.
(Refer to 10-2.5.)
Does AIR PURIFYING lamp stay OFF, or
continuously blink?
Remove the air purifying device,
firmly close the front panel, and then perform
AIR PURIFYING power operation check ( 2).
Does AIR PURIFYING lamp stay OFF, or
continuously blink?
Turn OFF the power supply, and check the
interlock switch (Air purifying device).
Is it firmly fixed?
Work and Not-work the interlock switch
(Air purifying device) using something
like a screw driver, and measure the resistance
between CN1R1
control P.C. board. Does the interlock
switch (Air purifying device) function?
Keep the interlock switch
(Air purifying device) Not-work (close)
using something like a screw driver.
Turn ON the power supply. Is the voltage between
CN1T1 (+) and
control P.C. board) 0V with the unit stopping?
(Refer to 10-7.)
Set the AIR PURIFYING power failure mode
recall function. (Refer to 10-2.2)
When AIR PURIFYING power turns
ON by pressing PURIFIER button once, is there
12.5V DC between CN1T1
Replace the air purifying device.
OBH623D
Yes
No
1
1 Regardless of normal or abnormal
condition, a short beep is emitted
once the signal is received.
OFF
Continuously blinking.
OFF
Continuously blinking.
No
Yes
No
and on the indoor electronic
Yes
No
12.5 V DC is generated.
(GND) on the electronic
Yes
No
(+) and (GND)?
Yes
High voltage (approximately 5.8kV) is generated during
AIR PURIFYING power operation.
Pay careful attention and never touch the air purifying device
and the high-voltage lead part.
Replace the indoor electronic control P.C. board.
MSZ-FH25VE
MSZ-FH35VE
MSZ-FH50VE
AIR
PURIFYING
operation
AIR PURIFYING power supply is normal.
Working of the interlock switch (Air purifying device)
due to uncomplete close of the front panel could cause
2-time flash.
2 Turn AIR PURIFYING power OFF and ON again.
(For turning OFF AIR PURIFYING power, refer to 10-2.3.)
(If it goes normal without turning OFF and ON, AIR PURIFYING lamp
does not go OFF.)
Abnormal discharge may occur due to much dirt on the
air purifying device, clean it.
After cleaning, make sure to attach the air purifying device
since it is completely dry.
If AIR PURIFYING power operation check is performed with
the air purifying device wet, protection gets active and
AIR PURIFYING lamp blinks continuously as well.
Firmly fix the interlock switch (Air purifying device).
Replace the interlock switch (Air purifying device).
Replace the indoor electronic control P.C. board.
Replace the indoor electronic control P.C. board,
after check of the wiring of CN1T1 on the indoor electronic
control P.C. board.
35
MSZ-FH25VE2
MSZ-FH35VE2
MSZ-FH50VE2