Hitachi RAF-25QXA RAF25QXA Manuel D’Utilisation
Codes de produits
RAF25QXA
14-16
14.4.2 INDOOR FAN DOES NOT OPERATE (OTHERS ARE NORMAL) – RAK-25/35/50PXA, RAK-
18/25/35/50/70PPA, RAK-18/25/35/50PEA, RAF-25/35/50RPA, RAF-25/35/50PXA, RAD-50/60/70PPA
Yes
Yes
Replace the fan motor
Replace the microcomputer
Can the fan be stopped
by remote control?
by remote control?
Replace the microcomputer
The microcomputer fan PWM
output at pin (24) is 1-5V
output at pin (24) is 1-5V
Perform final operation check
No
No
14.4.3 AIR DEFLECTOR DOES NOT MOVE (OTHERS ARE NORMAL)
Yes
Yes
Are pulse signals output at
microcomputer pin ⑮~⑱ when auto
swing is turned ON in the fan mode?
microcomputer pin ⑮~⑱ when auto
swing is turned ON in the fan mode?
Replace the microcomputer
No
No
Replace IC111
Is voltage over 15 or below 10V
being generated on the 12V line?
being generated on the 12V line?
Check IC711. If it is
normal, replace the air
deflector motor
normal, replace the air
deflector motor
Perform final operation check
14.4.4 CHECK THE CONTROL P.W.B. (POWER CIRCUIT) – RAK-25/35PXA, RAK-18/25/35PPA, RAK-
18/25/35/50PEA, RAF-25/35/50RPA, RAF-25/35PXA
Yes
No
Is 35V or 20V being output at pinn⑤
relative to 0V at pin③ of CN3
relative to 0V at pin③ of CN3
Check to see if the connection cables
are disconnected or reversed. If
normal, check the outdoor unit P.W.B.
are disconnected or reversed. If
normal, check the outdoor unit P.W.B.
Is DC5V being
generated?
generated?
Replace IC121. Check if a
short occurs in the 5V
line. If the 5V line is
shorted, ICP1 will open
again.
short occurs in the 5V
line. If the 5V line is
shorted, ICP1 will open
again.
Is 12V or 7V being output
at (+) relative to 0V at (-)
of C114
at (+) relative to 0V at (-)
of C114
Replace ICP1. Check if the air
deflector motor is shorted
and IC111, Q111, C114, ZD121
are defective.
deflector motor is shorted
and IC111, Q111, C114, ZD121
are defective.
Is CP1 normal? Normal if
it is less than 1
it is less than 1
Ω . Blown
(open) if it is 1
Ω or more.
Replace the terminal
board. Insert the
connection cable
securely.
board. Insert the
connection cable
securely.
Has the terminal board
thermal fuse blown
(open)?
thermal fuse blown
(open)?
Replace Q111 and IC111
Perform final operation
check
check
No
Yes
Yes (Normal)
Yes
(Open)
No
No
Yes
※2
※1
※1: When the unit is not in operation, the voltage across the 35V line may drop to 20V
※2: When the unit is not in operation, the voltage across the 12V line may drop to 7V
※2: When the unit is not in operation, the voltage across the 12V line may drop to 7V