– 174 –
4. Check the control P.W.B. (power circuit)
Is 35V being output at pin
⑤
relative to 0V at pin
③
of
CN3?
Is 12V being output
at (+) relative to 0V at (-) of
C114?
Is ICP1 normal?
Normal if it is less than 1 .
Blown (open) if it is 1 or more.
Replace ICP1. Check if the air
deflector motor is shorted, and
IC111, Q111, C114, ZD121 are
defective.
If shorted / defective, ICP1 will be
open again.
Replace the terminal board.
Insert the connection cable
securely.
Replace IC121. Check if a short
occurs in the 5V line.
If the 5V line is shorted, ICP1 will
be open again.
Check to see if the connection cables are
disconnected or reversed.
If normal, check the outdoor unit P.W.B.
Has the terminal board
thermal fuse blown (open)?
Replace Q111 and IC111.
Is DC5V being generated?
Perform final operation check.
Yes
Yes
(Normal)
Yes
(Open)
Yes
No
No
No
Yes
No
No
Summary of Contents for RAC-25FX8
Page 44: ... 49 MODEL RAC 25FX8 RAC 35FX8 SELF CHECK SELF MODE FORCECOOLING RED RED RED ...
Page 48: ...BASIC MODE MODEL RAF 25FX8 RAF 35FX8 57 button 63 67 67 71 75 67 ...
Page 148: ... 166 SELF DIAGNOSIS LIGHTING MODE MODEL RAC 25FX8 RAC 35FX8 ...
Page 191: ...TC NO 0780EF RAF 25FX8 RAC 25FX8 RAF 35FX8 RAC 35FX8 Printed in Japan HRT ...
